Some standard content:
Agricultural Industry Standard of the People's Republic of China
NY525—2002
Organic Fertilizer
Organic fertilizer
2002-B-27 Issued
2002-12-01 Implementation
Issued by the Ministry of Agriculture of the People's Republic of China
Chapter 4, Section 7.1 and 7.2 are regulatory clauses, and the rest are maintenance clauses: This standard is proposed by the Crop Production Management Department of the Ministry of Agriculture, NY525
This standard is established by: Ministry of Agriculture Feed Supervision and Testing Center (hereinafter referred to as the "Fertilizer Research Institute"), China Agricultural Science and Technology Bureau. Drafters of this standard: Jia Nengyou, Hu Qunzhong, Zhang Dadao, Kong Shemin, Wang Xie, 1 Scope
Organic fertilizer
This standard specifies the technical specifications of organic fertilizers. Technical requirements, test methods, specifications, labeling, packaging, transportation and storage, NY525-2D2
This standard is applicable to organic materials made from animal waste, animal residues and other organic materials as the main raw materials, which are heat-resistant and rot-resistant
The standard is applicable to small farms and other organic fertilizers produced by farmers themselves. 2 Normative references
The following documents are cited in this standard The following are dated references. All subsequent versions (excluding those with errors) or amendments are not applicable to this standard. However, all parties that agree with this standard are encouraged not to use the latest versions of these documents. For any later referenced documents, the latest version applies to this standard. F6I Titration analysis of chemical agents (volume analysis) Preparation of standard solutions G/251 Method for expressing limit numbers GB/TH679 General rules for the sampling of chemical products GBTGR2 Analytical test water quality and test method GB8172 Control standard for urban and agricultural waste GB1B57S Vacuum chamber method for high-water content of re-filtered materials H18382 Material identification and requirements 3 Terms and definitions The following terms and meanings apply to this standard Organic waste Fertilizer
The main function of fertilizer is to provide nutrition for plants. 4 Requirements
4.1 Appearance: Organic fertilizer is white, granular or granular, with no organic impurities and no harmful substances. 2.2. The technical indicators of organic fertilizers should meet the requirements of Table 1. Table 1 Technical indicators of organic fertilizers
Total organic matter (in terms of basis)/)
Total chemical content (in terms of basis)
Water (maximum water content)
5. 5~ 8. c
4.3 The content of organic fertilizers, egg mortality and E. coli content should meet the requirements of G12. NY5252002
5 Test method
The reagents in this standard should meet the requirements of GB 2101. The reagents listed are analytically pure unless otherwise specified. The test liquids should be prepared according to G/T601. 5.1 Appearance
, determination.
5.2 Determination of organic matter content (chromium aldehyde potassium content method) 5.2.1 Principle of the method
The organic matter content in organic fertilizers is determined by the quantitative determination of the organic matter content in the organic fertilizer under heating conditions. At the same time, silicon dioxide is used as the radiant. The organic matter content is obtained by multiplying the organic matter content before oxidation by the coefficient of 1724.
5.2-2 Equipment
Usually, the test equipment is discarded.
5.2.3 Reagents and preparation
5.2.3.1 Oxidation column, powder
5. 2. 3-2 Concentration (pl. 84),
5.2.3. Take the standard solution (KC0),) standard solution: 1/6 (KCr=1ml/. Weigh the magnetic pure 931 after 10 steps of 3-1h and dissolve it in 4m. It takes time to heat the whole solution and cool it gently to 11 volumes for use.
5.2.3.4 Service standard solution: cl176K.C0,>:.1mrl/L Take_1/)」1r1. Standard box chain (5.2.5. 16ml., dilute with water to 11, mix well and set aside. 5.2.3.5 Acid standard solution (S0 = 9.2aol/mL FeS, 7H0) analytically pure > 55.6g, add (1/2H0) = 6mal/mL, and dissolve in 30ml of water until the volume reaches 1mL. Set aside. The exact concentration of this solution is calibrated with U.101/L dichloroacetic acid new standard solution (=.2.3.4), and the calibration is done now. H-S0,)2mml/1. Standard filter determination: Pipette 30.00ml of potassium dichromate standard solution (5.2.3.). Add to 10ml flask. Add concentrated sulfuric acid 5.2.H.23m,5m. 2-3 drops of o-chloroform indicator (5.2.3.6). Use sulfuric acid standard solution (5.2.3.5) to determine: Based on the consumption of sulfuric acid standard solution during titration, calculate the accurate concentration according to formula (1). c1x||tt ||\: The concentration of potassium hydroxide standard is expressed in malt (mal). The volume of the standard solution of chromium chloride is expressed in ml. The volume of sulphuric acid provided by the standard titrator is expressed in liters (13). 5.2.3.6 Indicator: ferrous sulfate (analytical. 95) and o-chloroprene (analytical. 31.28) 1 Mml.
5. 2.4 Determination steps
standard sample ~. Confirm the pen 0 center 1) two angles of accurate A1nWlL g rivet standard drop wave 5.2.3.33).L: fully add concentrated sulfur tunnel 6m.. according to the 1mm mark next to the editor, put in boiling water m, every drop of about m pull once, take the cold water to the room, rinse with water a small amount of water, wash the bottle. Take a bottle, transfer the area into a 2L volume bottle, adjust to volume, and absorb 50% of the liquid at 25 0. Add about 100ml of water. Add 2~3ml of 9.2mal/1 iron standard solution (5.2.3.5), a rate indicator. When it is close to the end point: the dark color of the wave turns into dark green, and then gradually decrease until a negative signal is generated. Replace the sample with silicon dioxide (C.1*) F.2.3.1) and perform a blank test according to the same analysis method.
NY525—2002
If the amount of the standard solution with a deep acid used in the titration test is less than three times the amount of the standard solution used in the blank test, the sample should be weighed and re-measured
5.2.5 Expression of analysis results
The content of fertilizer is expressed by the mass fraction of the fertilizer. Calculate according to the formula (2>: Organic matter 1=c(P-)× 9. 303 ×1.721nx(l
Wherein:
The density of ferrous acid standard solution, unit is molar mass (mol)x
Blank age, use sulfuric acid standard to determine the body weight: unit is liter (mL; o.cc3
The coulometric mass of one-fourth of a ton, unit is g/mol! Coefficient of converting organic carbon to organic carbon; sample mass, unit is g);
Water content of the sample after air reduction!
Sieving multiple: 50/2:0..
S Filling difference
5. 2. 6. 1
5. 2. 6.2 The arithmetic mean of the collected parallel analysis results is the absolute relative standard of the final analysis results. Table 2: The relative values of the different experimental results meet the requirements of the support 3, Table 3: Organic version 5.3 Total content and determination 5.3.1 Principle of the method: (Absolute) 8% of the organic fertilizer in the organic fertilizer was decomposed into organic hydrogen peroxide. After the solution is alkalized, the hydrogen produced is absorbed by alkali solution and titrated with standard lacquer solution to calculate the total content of the product. 5.3.2 Reagents 5.3.2.1 Sulfuric acid (1.24). 5.3.2.2 30% hydrogen peroxide. 5.3.2.3 Chemical solution: Add 10% pure hydrogen peroxide to 10ml of water, 5.3.2.4 Add 2% alkali solution to water, add 1% alkali solution to water, add ...5.3.2.6 Sulfuric acid [1/TS), 0.5% tantalum green, 0.1% tantalum red and add it to 100ml. 95% ethanol 5.3.2.7 Sulfuric acid [1/TS), 0.01% tantalum green or 0.1% tantalum green 5.3.2.8 Standard concentration: Preparation and calibration, according to GB/T601: 5.3.3 Receiver. Equipment: Laboratory instrument conversion and concentration device (see Figure 1) 100ml.3: Adsorption rate: Adsorption rate <50 α1.),
-skinned tube
spherical electric sand interface or electric chamber:
·Ling Ning Moss:
Electric Bubble:
Holder Angle l.1.
Figure 1 5.3.4 Analysis steps 5.3.4.1 Preparation of sample solution Weigh the sample that has passed through a 5 nm sieve, F (finely spread to G1). Place in a boiling pot and collect the bottom. Rinse the sample attached to the bottle with a small amount of water. Add 5 ml sulfuric acid (5 ml, 3.2.1) and 1.5 ml hydrogen peroxide (3.2.2). Carefully place the bottle in a small bowl, so that the temperature is changed: slowly heat up on the electric furnace, remove the smoke, cool, add 15 drops of hydrogen peroxide, gently shake the boiling pot, add steam for 10 minutes, remove, cool, add 5~ drops of hydrogen peroxide in batches and filter in batches, until the drop is slightly yellow or light yellow. After the color is eliminated, continue to heat for 10 minutes. Remove the remaining hydrogen peroxide. Cool and carefully add water to 2 minutes! .~30-..Heat and pass. Remove the cold. Rinse with a small amount of small bucket, wash and collect into a non-fermented bottle, reduce the volume to 1 (m, level, add water to make up the volume. Static clean or state phosphorus paper ten can be sealed in a bottle, set aside. 5.3.1.2 Air test
Except for the risk of not adding sample, the amount of reagents and replacement are the same as 5.3.4.1. 5.3.4.3 Determination
5.3.4.3.1 Before heating, check whether the air is added and whether the air is cleaned and disinfected. General Certificate N525702
5.3. 4.3.2 Put 50.0ml of the clear solution into a hot bottle and add 2V water. Add 10l of acid to a 20V Erlenmeyer flask and obtain 15.3.2.4>. Mixing indicator (5.3.2.=>) is printed on the lower end of the condenser. Insert the boric acid liquid surface and slowly add -5ml sodium hydroxide to the steam chamber through a simple funnel <5.3.2.3>. Turn off the piston. Heat the steam chamber; stop steaming when the volume is about 100L.
5.3.4.3 .3 Use standard nitrogen fertilizer (5.3.2.6) to hydrate the fertilizer until the color changes from red to purple. Record the volume of standard nitrogen dissolved in mL. The volume of standard nitrogen consumed should not exceed 0.1 nl. 5.3.5 Expression of analytical results The total nitrogen content of the fertilizer shall be expressed as the mass distribution of the target material and calculated according to the formula: Total nitrogen content (N%) - (Y)X6X004D
The volume of standard nitrogen dissolved in liquid is expressed in cubic meters [I =L]: V-the volume of the blank solution, in milliliters (ml). C-the volume of the standard solution, in kiloliters (mol/l). 0.(14-the volume of the standard solution, in grams per milliliter (g/ml). D-the volume of the sample, in grams per milliliter (g/ml). 0.5/50-the mass of the test sample, in grams. X. The water content of the sample. The new value should be expressed as a decimal. 5.3.6 Allowable difference 5.3.6.1 Take the arithmetic mean of the results of two parallel determinations as the determination result. The allowable absolute difference of the two parallel determination results shall meet the requirements of Table 1. 5.3.6.2
0.50 ~1. x
5.4 Determination of total phosphorus content
5.4.7 Principle of the method
The organic fertilizer is tested by the oxygen elimination point of the acid machine. Under a certain acidity, the phosphorus radical in the filter reacts with the pyrolysis and the pyrolysis to form a yellow powder. Within a certain concentration range of 1m/.~20DVg/: phosphorus (F), the absorbance of the yellow powder is in direct proportion to the content. The phosphorus is quantified by spectrophotometry. 5.4.2 Reagents|| 5.4.2.1 Follow 101.B4). 5.4.2.2 Nitric acid, 5.4.2.3 3% peroxide: 5.4.2.4 Vanadium plating reagent: A sugar: weigh 2.1.g sodium hydroxide and add it to 132ml water, B micron: weigh 1.25% vanadium alcohol and add it to 339ml water, cool it down and add 250ml acid (5.4.2.2), cool it down for 5 minutes, add 4% sodium hydroxide to 1% solution, dilute it with water to 1.5%, mix it evenly, and add it to the battery 4: 5.4.2.5 Sodium hydroxide solution with a volumetric method of c%. 5.4.2.6 Sulfur (5.1.2.1): a solution with a volume and a decomposition efficiency of 3%. 5.4.2.7 Phosphorus standard solution, 50 g/m3.
Take U.2195R and dissolve it in 1 l (10% of the required dihydrogen acid (fast grade pure), transfer it to a 1 ml thick bottle, add 5 ml of magnetic acid (5.4.2.1>. After cooling, use water to mark the scale. The spectrum concentration is 1 ml. Phosphorus (P) 50g 5.4.2.8%. 4-7.2,5-) mononitrophenol indicator: mass concentration of C.2%. Weigh 3.2 (or 2,6i-)-nitrophenol and dissolve it in 1 CCml water (volume): 5.4.2.9 Youqun paper
5. 4. 3 Instruments and equipment
Bandwidth experimental plan and set the route.
5. 4.4 Analysis Steps
5.4.4.1 Preparation of Sample Solution
Weigh 3.3 g~0.5 of the sieve of 1/4 1/8 inch sieve and prepare according to 3.3..1. 5.4.4.2 Preparation of Blank Solution
Except for the addition of 1/4 inch, the reagents used are the same as those in 5.4.4.1. 5.2.4.3 Determination
Pipette 5.0 ml. 11.00 rrT of the sample solution (4.4.1) (Phosphorus content: 51g~1.5g) Dissolve in 50mL volumetric bottles with water to 3ml. The standard liquid series is colored under the condition of non-freezing liquid. Read the absorbance colorimetrically. 3.4.4.4. Prepare the calibration curve. Discard the standard liquid (5.4.2.7) 0, 1.C, 2.5.5.0, 7.5, 10.0.15.0mL respectively in 7 50mL volumetric bottles. Add water to 3ml. The sample is equal to the absorbance of the sample. 30L or so, add 2 drops of 2,4 (or 2.6) diphenylphenol indicator to fill 15.4.2.6, use hydroxide solution (5.4.2.5) and acid solution (5.4.2.6) to dissolve and show a color change, add 1U.U1mL ammonium vanadate (5.4.2.4), probe, and water to determine the solution is 1mT. Phosphorus (P) 0.1..2.5, 5.0.7.5, 10.6.15.1 standard Liquid series. Place at room temperature for 2 minutes, use 1.c aperture to compare colors at 40 nm of the spectrophotometer, adjust the pseudo-band isotope with air flow, compare, and read the absorbance. Draw a standard curve or find a linear regression equation based on the phosphorus band intensity and absorbance. 5.4.5 Rate of analysis results
The total phosphorus content is expressed as the mass fraction of the sample, calculated according to formula 4, CXVXE
Total phosphorus (P:0, (%) = × 2.29 × 10 * in
obtained by calibration or regression analysis or obtain the phosphorus concentration of the visible light package, the unit is micrograms per liter/ml..
color development volume.5oml..
division multiples of heat regulation/division ice appear, take out 10m.-special test column consumption, unit is gram (:X.
air-dried into a blue water-containing disk;
convert the disk P into a crushing factor (the two numbers of PO will be converted into mass fractions.bzxZ.net
1) The choice of wavelength can be rooted in the brand installation:
pregnancy depends on pressure1.
Figure 1 Ammonia retention device
5.3.4 Analysis steps
5.3.4.1 Preparation of sample solution
Weigh the sample solution that has passed 5 nm sieve (finely spread to G1). Place it in a boiling pot and rinse the bottom with a small amount of water. Add 5 ml of sulfuric acid (5 ml, 3.2.1) and 1.5 ml of hydrogen peroxide (3.2.2). Carefully put the bottle into a small sieve and heat it slowly on an electric stove. There is some fumes, then cool it down. Add 15 drops of hydrogen peroxide while cooling. Gently shake the boiling pot. Add steam for 10 min, remove it, cool it down, add 5~ drops of hydrogen peroxide in batches and filter it in batches. After the drop is slightly yellow or light yellow, continue to heat for 10 min. Remove all the remaining hydrogen peroxide. Remove the coolant and rinse with water until 2m! .~30-.. Heat and pass. Remove the coolant. Use a small amount of small rinse water to wash the two small parts, collect the washed bead into the baking bottle, reduce the volume to 1(m, level, add water to make up the volume. Static clean or state phosphorus paper ten can be sealed in the bottle, and set aside. 5.3.1.2 Air self-test
Except for the risk of not adding sample, the amount of reagents and replacement are the same as 5.3.4.1. 5.3.4.3 Determination
5.3.4.3.1 Before heating, check whether the air is added and whether it is air-washed and obtain the general certificate N525702
5.3. 4.3.2 Put 50.0ml of the clear solution into a hot bottle and add 2V water. Add 10l of acid to a 20V Erlenmeyer flask and obtain 15.3.2.4>. Mixing indicator (5.3.2.=>) is printed on the lower end of the condenser. Insert the boric acid liquid surface and slowly add -5ml sodium hydroxide to the steam chamber through a simple funnel <5.3.2.3>. Turn off the piston. Heat the steam chamber; stop steaming when the volume is about 100L.
5.3.4.3 .3 Use standard nitrogen fertilizer (5.3.2.6) to hydrate the fertilizer until the color changes from red to purple. Record the volume of standard nitrogen dissolved in mL. The volume of standard nitrogen consumed should not exceed 0.1 nl. 5.3.5 Expression of analytical results The total nitrogen content of the fertilizer shall be expressed as the mass distribution of the target material and calculated according to the formula: Total nitrogen content (N%) - (Y)X6X004D
The volume of standard nitrogen dissolved in liquid is expressed in cubic meters [I =L]: V-the volume of the blank solution, in milliliters (ml). C-the volume of the standard solution, in kiloliters (mol/l). 0.(14-the volume of the standard solution, in grams per milliliter (g/ml). D-the volume of the sample, in grams per milliliter (g/ml). 0.5/50-the mass of the test sample, in grams. X. The water content of the sample. The new value should be expressed as a decimal. 5.3.6 Allowable difference 5.3.6.1 Take the arithmetic mean of the results of two parallel determinations as the determination result. The allowable absolute difference of the two parallel determination results shall meet the requirements of Table 1. 5.3.6.2
0.50 ~1. x
5.4 Determination of total phosphorus content
5.4.7 Principle of the method
The organic fertilizer is tested by the oxygen elimination point of the acid machine. Under a certain acidity, the phosphorus radical in the filter reacts with the pyrolysis and the pyrolysis to form a yellow powder. Within a certain concentration range of 1m/.~20DVg/: phosphorus (F), the absorbance of the yellow powder is in direct proportion to the content. The phosphorus is quantified by spectrophotometry. 5.4.2 Reagents|| 5.4.2.1 Follow 101.B4). 5.4.2.2 Nitric acid, 5.4.2.3 3% peroxide: 5.4.2.4 Vanadium plating reagent: A sugar: weigh 2.1.g sodium hydroxide and add it to 132ml water, B micron: weigh 1.25% vanadium alcohol and add it to 339ml water, cool it down and add 250ml acid (5.4.2.2), cool it down for 5 minutes, add 4% sodium hydroxide to 1% solution, dilute it with water to 1.5%, mix it evenly, and add it to the battery 4: 5.4.2.5 Sodium hydroxide solution with a volumetric method of c%. 5.4.2.6 Sulfur (5.1.2.1): a solution with a volume and a decomposition efficiency of 3%. 5.4.2.7 Phosphorus standard solution, 50 g/m3.
Take U.2195R and dissolve it in 1 l (10% of the required dihydrogen acid (fast grade pure), transfer it to a 1 ml thick bottle, add 5 ml of magnetic acid (5.4.2.1>. After cooling, use water to mark the scale. The spectrum concentration is 1 ml. Phosphorus (P) 50g 5.4.2.8%. 4-7.2,5-) mononitrophenol indicator: mass concentration of C.2%. Weigh 3.2 (or 2,6i-)-nitrophenol and dissolve it in 1 CCml water (volume): 5.4.2.9 Youqun paper
5. 4. 3 Instruments and equipment
Bandwidth experimental plan and set the route.
5. 4.4 Analysis Steps
5.4.4.1 Preparation of Sample Solution
Weigh 3.3 g~0.5 of the sieve of 1/4 1/8 inch sieve and prepare according to 3.3..1. 5.4.4.2 Preparation of Blank Solution
Except for the addition of 1/4 inch, the reagents used are the same as those in 5.4.4.1. 5.2.4.3 Determination
Pipette 5.0 ml. 11.00 rrT of the sample solution (4.4.1) (Phosphorus content: 51g~1.5g) Dissolve in 50mL volumetric bottles with water to 3ml. The standard liquid series is colored under the condition of non-freezing liquid. Read the absorbance colorimetrically. 3.4.4.4. Prepare the calibration curve. Discard the standard liquid (5.4.2.7) 0, 1.C, 2.5.5.0, 7.5, 10.0.15.0mL respectively in 7 50mL volumetric bottles. Add water to 3ml. The sample is equal to the absorbance of the sample. 30L or so, add 2 drops of 2,4 (or 2.6) diphenylphenol indicator to fill 15.4.2.6, use hydroxide solution (5.4.2.5) and acid solution (5.4.2.6) to dissolve and show a color change, add 1U.U1mL ammonium vanadate (5.4.2.4), probe, and water to determine the solution is 1mT. Phosphorus (P) 0.1..2.5, 5.0.7.5, 10.6.15.1 standard Liquid series. Place at room temperature for 2 minutes, use 1.c aperture to compare colors at 40 nm of the spectrometer wave, adjust the pseudo-band isotope with air flow, compare, and read the absorbance. Draw a standard curve or find a linear regression equation based on the phosphorus band intensity and absorbance. 5.4.5 Rate of analysis results
The total phosphorus content is expressed as the mass fraction of the sample, calculated according to formula 4, CXVXE
Total phosphorus (P:0, (%) = × 2.29 × 10 * in
obtained by calibration or regression analysis or obtain the phosphorus concentration of the visible light package, the unit is micrograms per liter/ml..
color development volume.5oml..
division multiples of heat regulation/division ice appear, take out 10m.-special test column consumption, unit is gram (:X.
air-dried into a blue water-containing disk;
convert the disk P into a crushing factor (the two numbers of PO will be converted into mass fractions.
1) The choice of wavelength can be rooted in the brand installation:
pregnancy depends on pressure1.
Figure 1 Ammonia retention device
5.3.4 Analysis steps
5.3.4.1 Preparation of sample solution
Weigh the sample solution that has passed 5 nm sieve (finely spread to G1). Place it in a boiling pot and rinse the bottom with a small amount of water. Add 5 ml of sulfuric acid (5 ml, 3.2.1) and 1.5 ml of hydrogen peroxide (3.2.2). Carefully put the bottle into a small sieve and heat it slowly on an electric stove. There is some fumes, then cool it down. Add 15 drops of hydrogen peroxide while cooling. Gently shake the boiling pot. Add steam for 10 min, remove it, cool it down, add 5~ drops of hydrogen peroxide in batches and filter it in batches. After the drop is slightly yellow or light yellow, continue to heat for 10 min. Remove all the remaining hydrogen peroxide. Remove the coolant and rinse with water until 2m! .~30-.. Heat and pass. Remove the coolant. Use a small amount of small rinse water to wash the two small parts, collect the washed bead into the baking bottle, reduce the volume to 1(m, level, add water to make up the volume. Static clean or state phosphorus paper ten can be sealed in the bottle, and set aside. 5.3.1.2 Air self-test
Except for the risk of not adding sample, the amount of reagents and replacement are the same as 5.3.4.1. 5.3.4.3 Determination
5.3.4.3.1 Before heating, check whether the air is added and whether it is air-washed and obtain the general certificate N525702
5.3. 4.3.2 Put 50.0ml of the clear solution into a hot bottle and add 2V water. Add 10l of acid to a 20V Erlenmeyer flask and obtain 15.3.2.4>. Mixing indicator (5.3.2.=>) is printed on the lower end of the condenser. Insert the boric acid liquid surface and slowly add -5ml sodium hydroxide to the steam chamber through a simple funnel <5.3.2.3>. Turn off the piston. Heat the steam chamber; stop steaming when the volume is about 100L.
5.3.4.3 .3 Use standard nitrogen fertilizer (5.3.2.6) to hydrate the fertilizer until the color changes from red to purple. Record the volume of standard nitrogen dissolved in mL. The volume of standard nitrogen consumed should not exceed 0.1 nl. 5.3.5 Expression of analytical results The total nitrogen content of the fertilizer shall be expressed as the mass distribution of the target material and calculated according to the formula: Total nitrogen content (N%) - (Y)X6X004D
The volume of standard nitrogen dissolved in liquid is expressed in cubic meters [I =L]: V-the volume of the blank solution, in milliliters (ml). C-the volume of the standard solution, in kiloliters (mol/l). 0.(14-the volume of the standard solution, in grams per milliliter (g/ml). D-the volume of the sample, in grams per milliliter (g/ml). 0.5/50-the mass of the test sample, in grams. X. The water content of the sample. The new value should be expressed as a decimal. 5.3.6 Allowable difference 5.3.6.1 Take the arithmetic mean of the results of two parallel determinations as the determination result. The allowable absolute difference of the two parallel determination results shall meet the requirements of Table 1. 5.3.6.2
0.50 ~1. x
5.4 Determination of total phosphorus content
5.4.7 Principle of the method
The organic fertilizer is tested by the oxygen elimination point of the acid machine. Under a certain acidity, the phosphorus radical in the filter reacts with the pyrolysis and the pyrolysis to form a yellow powder. Within a certain concentration range of 1m/.~20DVg/: phosphorus (F), the absorbance of the yellow powder is in direct proportion to the content. The phosphorus is quantified by spectrophotometry. 5.4.2 Reagents|| 5.4.2.1 Follow 101.B4). 5.4.2.2 Nitric acid, 5.4.2.3 3% peroxide: 5.4.2.4 Vanadium plating reagent: A sugar: weigh 2.1.g sodium hydroxide and add it to 132ml water, B micron: weigh 1.25% vanadium alcohol and add it to 339ml water, cool it down and add 250ml acid (5.4.2.2), cool it down for 5 minutes, add 4% sodium hydroxide to 1% solution, dilute it with water to 1.5%, mix it evenly, and add it to the battery 4: 5.4.2.5 Sodium hydroxide solution with a volumetric method of c%. 5.4.2.6 Sulfur (5.1.2.1): a solution with a volume and a decomposition efficiency of 3%. 5.4.2.7 Phosphorus standard solution, 50 g/m3.
Take U.2195R and dissolve it in 1 l (10% of the required dihydrogen acid (fast grade pure), transfer it to a 1 ml thick bottle, add 5 ml of magnetic acid (5.4.2.1>. After cooling, use water to mark the scale. The spectrum concentration is 1 ml. Phosphorus (P) 50g 5.4.2.8%. 4-7.2,5-) mononitrophenol indicator: mass concentration of C.2%. Weigh 3.2 (or 2,6i-)-nitrophenol and dissolve it in 1 CCml water (volume): 5.4.2.9 Youqun paper
5. 4. 3 Instruments and equipment
Bandwidth experimental plan and set the route.
5. 4.4 Analysis Steps
5.4.4.1 Preparation of Sample Solution
Weigh 3.3 g~0.5 of the sieve of 1/4 1/8 inch sieve and prepare according to 3.3..1. 5.4.4.2 Preparation of Blank Solution
Except for the addition of 1/4 inch, the reagents used are the same as those in 5.4.4.1. 5.2.4.3 Determination
Pipette 5.0 ml. 11.00 rrT of the sample solution (4.4.1) (Phosphorus content: 51g~1.5g) Dissolve in 50mL volumetric bottles with water to 3ml. The standard liquid series is colored under the condition of non-freezing liquid. Read the absorbance colorimetrically. 3.4.4.4. Prepare the calibration curve. Discard the standard liquid (5.4.2.7) 0, 1.C, 2.5.5.0, 7.5, 10.0.15.0mL respectively in 7 50mL volumetric bottles. Add water to 3ml. The sample is equal to the absorbance of the sample. 30L or so, add 2 drops of 2,4 (or 2.6) diphenylphenol indicator to fill 15.4.2.6, use hydroxide solution (5.4.2.5) and acid solution (5.4.2.6) to dissolve and show a color change, add 1U.U1mL ammonium vanadate (5.4.2.4), probe, and water to determine the solution is 1mT. Phosphorus (P) 0.1..2.5, 5.0.7.5, 10.6.15.1 standard Liquid series. Place at room temperature for 2 minutes, use 1.c aperture to compare colors at 40 nm of the spectrometer wave, adjust the pseudo-band isotope with air flow, compare, and read the absorbance. Draw a standard curve or find a linear regression equation based on the phosphorus band intensity and absorbance. 5.4.5 Rate of analysis results
The total phosphorus content is expressed as the mass fraction of the sample, calculated according to formula 4, CXVXE
Total phosphorus (P:0, (%) = × 2.29 × 10 * in the
by calibration or regression to obtain the phosphorus concentration of the visible light, the unit is micrograms per liter / ml..
color volume. 50ml..
scale multiples through the heat gauge / scale ice appear,: take out 10m.-special test column consumption, unit is gram (: X.
air-dried into a blue water disk;
the disk P will be broken into pieces (PO two numbers will be converted into mass fraction factors.
1) the choice of wavelength can be root culture brand installation degree:
pregnancy pressure=>Connect to the lower end of the condenser, insert the port into the boric acid liquid level, and slowly add -5m sodium hydroxide to the distillation chamber from the simple funnel <5.3.2.3>. Turn off the light piston. Heat and steam; stop steaming when about 100 L of nitrogen has been removed.
5.3.4.3.3 Use standard nitrogen sulfate or standard nitrogen sulfate (5.3.2.6) to stir until the color changes from red to purple. Record the volume of standard nitrogen sulfate in mL. The volume of standard nitrogen sulfate consumed shall not exceed 0.1 nL.5.3.5 Expression of analytical results
The total nitrogen content of the fertilizer shall be expressed in terms of the mass dispersion of the target material and calculated according to the formula: Total nitrogen content (N%) - the volume of the standard nitrogen sulfate solution in the final solution, in litres [IL]: V - the volume of the blank standard nitrogen sulfate solution, in milliliters! (ml.) c-dry standard solution, unit is coulomb-year liter (mol/L): 0.(14-short rate, unit is gram per liter (g/ml): D-take the number. Take the product of the specified product/min. 05/50. Weigh the mass of the test solution + in grams;
X. Water content of the solution.
The new result should be expressed as a decimal.
5.3.6 Allowable difference
5.3.6.1 Take the arithmetic mean of the results of two parallel determinations as the determination result. The allowable absolute difference of the two parallel determination results shall meet the requirements of Table 1. 5.3.6.2
0.50 ~1. x
5.4 Determination of total phosphorus content
5.4.7 Principle of the method
The organic fertilizer is tested by the oxygen elimination point of the acid machine. Under a certain acidity, the phosphorus radical in the filter reacts with the pyrolysis and the pyrolysis to form a yellow powder. Within a certain concentration range of 1m/.~20DVg/: phosphorus (F), the absorbance of the yellow powder is in direct proportion to the content. The phosphorus is quantified by spectrophotometry. 5.4.2 Reagents|| 5.4.2.1 Follow 101.B4).
5.4.2.2 Nitric acid,
5.4.2.3 3% peroxide:
5.4.2.4 Vanadium molybdenum plating reagent:
A sugar: weigh 2.1.g of vanadium sulfate and add it to 132ml of water, B micron: weigh 1.25% of metavanadate alcohol and add it to 339ml of water, cool it down and add 250ml of acid (5.4.2.2), cool it down for 5 hours. 5252002
Inject 4 chains of sodium hydroxide into 1% liquid under pressure, dilute with water to 1I. Mix well, and add to brown battery 4: 5.4.2.5 Sodium hydroxide solution with a volumetric method of c%. 5.4.2.6 Sulfur (5.1.2.1): solution with a volume and a potency of 3%. 5.4.2.7 Phosphorus standard solution, 50 g/m.
Pipette U.2195R through 11 (for the need of dihydrogen acid (fast Grade pure), after decomposition in water, transfer to a 1 volume thick bottle, add 5ml magnetic acid (5.4.2.1>. After cooling, use water to mark the pen, the spectrum concentration is 1ml. Phosphorus (P) 50g5.4.2.8%. 4-7.2,5-) mononitrophenol indicator: mass concentration of C.2% grid. Weigh 3.2 (or 2,6i-)-nitro and dissolve in 1CCm water (volume): 5.4.2.9 Youqun paper
5. 4.3 Instruments and equipment
Bandwidth experimental plan
5.4.4 Analytical procedures
5.4.4.1 Preparation of sample solution
Weigh 3.3 g~0.5 of 1% ... 3.4.4.4. Calibration curve preparation: Discard the standard liquid (5.4.2.7) 0, 1.C, 2.5.5.0, 7.5, 10.0.15.0mL respectively in 7 50mL volumetric bottles, add water to the sample and reduce the volume to about 30L, add 2 drops of 2,4 (or 2.6) diphenylphenol indicator to fill 15.4.2.6, use a hydroxide hook to remove (5.4.2.5> and the acid Solution (5.4.2.6) is adjusted to reduce the color, add 1U.U1mL ammonium vanadate reagent (5.4.2.4), probe, water, and the solution is 1mL standard solution containing 0.1, 2.5, 5.0, 7.5, 10.6, 15.1 of phosphorus (P). Place it at room temperature for 2 minutes, use 1.c aperture to compare the color at 40m of the spectrophotometer, adjust the pseudo band equal point with air, compare, and read the absorbance. Draw a standard curve or find a linear regression equation based on the phosphorus band intensity and absorbance. 5.4.5 Analysis results The total instantaneous amount of the sample is expressed as the mass fraction of the sample, calculated according to formula 4, CXVXE
Total phosphorus (P:0, (%) = × 2.29 × 10 *
The phosphorus concentration of the sample is obtained by calibration or regression, and the unit is micrograms per liter/ml..
The color development volume is .5oml..
The multiple of the heat treatment method/division is determined by the heat standard/division ice: Take out 10m.-Special test volume, unit is grams (:X.
Air-dried into a blue water-containing plate;
Convert the plate P into a factor of mass fraction (PO).
1) The choice of wavelength can be based on the pressure:
Pregnancy depends on the pressure=>Connect to the lower end of the condenser, insert the port into the boric acid liquid level, and slowly add -5m sodium hydroxide to the distillation chamber from the simple funnel <5.3.2.3>. Turn off the light piston. Heat and steam; stop steaming when about 100 L of nitrogen has been removed.
5.3.4.3.3 Use standard nitrogen sulfate or standard nitrogen sulfate (5.3.2.6) to stir until the color changes from red to purple. Record the volume of standard nitrogen sulfate in mL. The volume of standard nitrogen sulfate consumed shall not exceed 0.1 nL.5.3.5 Expression of analytical results
The total nitrogen content of the fertilizer shall be expressed in terms of the mass dispersion of the target material and calculated according to the formula: Total nitrogen content (N%) - the volume of the standard nitrogen sulfate solution in the final solution, in litres [IL]: V - the volume of the blank standard nitrogen sulfate solution, in milliliters! (ml.) c-dry standard solution, unit is coulomb-year liter (mol/L): 0.(14-short rate, unit is gram per liter (g/ml): D-take the number. Take the product of the specified product/min. 05/50. Weigh the mass of the test solution + in grams;
X. Water content of the solution.
The new result should be expressed as a decimal.
5.3.6 Allowable difference
5.3.6.1 Take the arithmetic mean of the results of two parallel determinations as the determination result. The allowable absolute difference of the two parallel determination results shall meet the requirements of Table 1. 5.3.6.2
0.50 ~1. x
5.4 Determination of total phosphorus content
5.4.7 Principle of the method
The organic fertilizer is tested by the oxygen elimination point of the acid machine. Under a certain acidity, the phosphorus radical in the filter reacts with the pyrolysis and the pyrolysis to form a yellow powder. Within a certain concentration range of 1m/.~20DVg/: phosphorus (F), the absorbance of the yellow powder is in direct proportion to the content. The phosphorus is quantified by spectrophotometry. 5.4.2 Reagents|| 5.4.2.1 Follow 101.B4).
5.4.2.2 Nitric acid,
5.4.2.3 3% peroxide:
5.4.2.4 Vanadium molybdenum plating reagent:
A sugar: weigh 2.1.g vanadium hydroxide and add it to 132ml water, B micron: weigh 1.25 metavanadium alcohol and add it to 339ml water, cool it down and add 250ml acid (5.4.2.2), cool it down for 5 hours. 5252002
Inject 4 chains of sodium hydroxide into 1% liquid under pressure, dilute with water to 1I. Mix well, and add to brown battery 4: 5.4.2.5 Sodium hydroxide solution with a volumetric method of c%. 5.4.2.6 Sulfur (5.1.2.1): solution with a volume and a potency of 3%. 5.4.2.7 Phosphorus standard solution, 50 g/m.
Pipette U.2195R through 11 (for the need of dihydrogen acid (fast Grade pure), after decomposition in water, transfer to a 1 volume thick bottle, add 5ml magnetic acid (5.4.2.1>. After cooling, use water to mark the pen, the spectrum concentration is 1ml. Phosphorus (P) 50g5.4.2.8%. 4-7.2,5-) mononitrophenol indicator: mass concentration of C.2% grid. Weigh 3.2 (or 2,6i-)-nitro and dissolve in 1CCm water (volume): 5.4.2.9 Youqun paper
5. 4.3 Instruments and equipment
Bandwidth experimental plan
5.4.4 Analytical procedures
5.4.4.1 Preparation of sample solution
Weigh 3.3 g~0.5 of 1% ... 3.4.4.4. Calibration curve preparation: Discard the standard liquid (5.4.2.7) 0, 1.C, 2.5.5.0, 7.5, 10.0.15.0mL respectively in 7 50mL volumetric bottles, add water to the sample and reduce the volume to about 30L, add 2 drops of 2,4 (or 2.6) diphenylphenol indicator to fill 15.4.2.6, use a hydroxide hook to remove (5.4.2.5> and the acid Solution (5.4.2.6) is adjusted to reduce the color, add 1U.U1mL ammonium vanadate reagent (5.4.2.4), probe, water, and the solution is 1mL standard solution containing 0.1, 2.5, 5.0, 7.5, 10.6, 15.1 of phosphorus (P). Place it at room temperature for 2 minutes, use 1.c aperture to compare the color at 40m of the spectrophotometer, adjust the pseudo band equal point with air, compare, and read the absorbance. Draw a standard curve or find a linear regression equation based on the phosphorus band intensity and absorbance. 5.4.5 Analysis results The total instantaneous amount of the sample is expressed as the mass fraction of the sample, calculated according to formula 4, CXVXE
Total phosphorus (P:0, (%) = × 2.29 × 10 *
The phosphorus concentration of the sample is obtained by calibration or regression, and the unit is micrograms per liter/ml..
The color development volume is .5oml..
The multiple of the heat treatment method/division is determined by the heat standard/division ice: Take out 10m.-Special test volume, unit is grams (:X.
Air-dried into a blue water-containing plate;
Convert the plate P into a factor of mass fraction (PO).
1) The choice of wavelength can be based on the pressure:
Pregnancy depends on the pressure2.8%.4-7.2,5-) mononitrophenol indicator: a sieve with a mass concentration of C.2%. Weigh 3.2 (or 2,6i-)-nitrophenol and dissolve it in 1CCm of water (volume): 5.4.2.9
5.4.3 Instruments and equipment
Bandwidth experimental plan
5.4.4 Analysis steps
5.4.4.1 Preparation of sample solution
Weigh 3.3g~0.5 of 1/4 sieve and prepare according to 3.3.1. 5.4.4.2 Preparation of blank solution
Except that no air is added, the reagents used are the same as those in 5.4.4.1. 5.2.4.3 Determination
Pipette 5.0ml.11.00rrT sample solution (4.4.1) (containing .51g~1.5ml phosphorus) into a 50mL volumetric bottle with water to 3ml. Add the standard non-ionic liquid to the colorimetric condition and read the absorbance by colorimetry. 3.4.4.4. Prepare the calibration curve
Pour 0.1, 1.00ml, 2.5, 5.0, 7.5, 10.0, 15.0ml of the standard solution (5.4.2.7) into 7 50mL volumetric bottles respectively, add water to the sample drop to about 30L, add 2 drops of 2,4 (or 2.6) diphenylphenol indicator to fill up to 15.4.2 .6 Use hydroxide ions (5.4.2.5) and sodium hydroxide solution (5.4.2.6) to dissolve the colorimetric solution, add 1U.U1mL ammonium vanadate reagent (5.4.2.4), probe, and water to make the solution 1mL. The solution contains 0.1, 2.5, 5.0, 7.5, 10.6, 15.1 standard solutions of phosphorus (P). Place it at room temperature for 2 minutes, use 1.c aperture to compare the color at 40m in the spectrophotometer, adjust the pseudo-band isotropic point with air, compare, and read the absorbance. Draw a standard curve or find a linear regression equation based on the phosphorus band intensity and absorbance. 5.4.5 Rate of analysis results The total instantaneous amount of the sample is expressed as the mass fraction of the sample, calculated according to formula 4, CXVXE
Total phosphorus (P: 0, (%) = × 2.29 × 10 * in
obtained by calibration or regression analysis or obtain the phosphorus concentration of the visible light package, the unit is micrograms per liter/ml..
color development volume.5oml..
division multiples of heat regulation/division ice appear, take out 10m.-special test column consumption, unit is gram (:X.
air-dried into a blue water-containing disk;
convert the disk P into a crushing factor (the two numbers of PO will be converted into mass fractions.
1) The choice of wavelength can be rooted in the brand installation:
pregnancy depends on pressure2.8%.4-7.2,5-) mononitrophenol indicator: a sieve with a mass concentration of C.2%. Weigh 3.2 (or 2,6i-)-nitrophenol and dissolve it in 1CCm of water (volume): 5.4.2.9
5.4.3 Instruments and equipment
Bandwidth experimental plan
5.4.4 Analysis steps
5.4.4.1 Preparation of sample solution
Weigh 3.3g~0.5 of 1/4 sieve and prepare according to 3.3.1. 5.4.4.2 Preparation of blank solution
Except that no air is added, the reagents used are the same as those in 5.4.4.1. 5.2.4.3 Determination
Pipette 5.0ml.11.00rrT sample solution (4.4.1) (containing .51g~1.5ml phosphorus) into a 50mL volumetric bottle with water to 3ml. Add the standard non-ionic liquid to the colorimetric condition and read the absorbance by colorimetry. 3.4.4.4. Prepare the calibration curve
Pour 0.1, 1.00ml, 2.5, 5.0, 7.5, 10.0, 15.0ml of the standard solution (5.4.2.7) into 7 50mL volumetric bottles respectively, add water to the sample drop to about 30L, add 2 drops of 2,4 (or 2.6) diphenylphenol indicator to fill up to 15.4.2 .6 Use hydroxide ions (5.4.2.5) and sodium hydroxide solution (5.4.2.6) to dissolve the colorimetric solution, add 1U.U1mL ammonium vanadate reagent (5.4.2.4), probe, and water to make the solution 1mL. The solution contains 0.1, 2.5, 5.0, 7.5, 10.6, 15.1 standard solutions of phosphorus (P). Place it at room temperature for 2 minutes, use 1.c aperture to compare the color at 40m in the spectrophotometer, adjust the pseudo-band isotropic point with air, compare, and read the absorbance. Draw a standard curve or find a linear regression equation based on the phosphorus band intensity and absorbance. 5.4.5 Rate of analysis results The total instantaneous amount of the sample is expressed as the mass fraction of the sample, calculated according to formula 4, CXVXE
Total phosphorus (P: 0, (%) = × 2.29 × 10 * in
obtained by calibration or regression analysis or obtain the phosphorus concentration of the visible light package, the unit is micrograms per liter/ml..
color development volume.5oml..
division multiples of heat regulation/division ice appear, take out 10m.-special test column consumption, unit is gram (:X.
air-dried into a blue water-containing disk;
convert the disk P into a crushing factor (the two numbers of PO will be converted into mass fractions.
1) The choice of wavelength can be rooted in the brand installation:
pregnancy depends on pressurePut it in a 50L volumetric flask. Use water to calibrate the instrument under the same conditions as the standard sieve rate series. However, after 5 samples are collected, the instrument must be calibrated with the known standard. 5. 5.4. 4 Draw the standard curve of potassium standard drop (5.E.2.40, 2.5C.5.0F.7.5C.19.00m). Put them in 5mT volumetric flasks respectively. Make the volume of the sample equal to that of the sample. The standard density series with water is: mY. Potassium (K) content G.5.00.10.00.15.00.20.004. On the fire photometer, take the empty liquid as the zero point of the instrument, and then adjust the full-scale rate of change to the standard in the series of high and low concentrations. Then measure the other standard values in turn, and verify the indicated value. Draw the calibration curve based on the potassium method and the indicated value to obtain the regression equation. 5.5.5 Analysis results
The total potassium content of the material is expressed in terms of the mass of the material. Calculate the total potassium % according to the formula (X 1.30 x 10:
X (--X
NY 5252002
.-Use the energy supply line to obtain the potassium concentration or the formula to calculate the concentration, the unit is microgram per liter (ml fixed volume: this operation is 50ml
multiples, fixed volume/partial volume. 1/31D
weigh the test rod, the unit is gram):
ten columns of water;
convert potassium (K) into potassium (K,O) content: convert the content into a mass fraction of the four numbers
the result is expressed as a decimal place.
5.5.6 Allowable error
5.5.6.1 Take the technical average of the results of two and a half tests as the test result. 5.5.6.2 The allowable absolute difference of the results of two and a half tests should meet the requirements of the table. 6
1. 23- 1. 80
5.6 Determination of moisture content (vacuum drying method)
Perform according to T857, and determine the fresh moisture content and the water content (X.): 5.7 Determination of acidity (pH meter method)
5.7.1 Principle of the method
The sample is subjected to water balance and then directly measured with a pH acidometer. 5.7.2 Instruments
Used laboratory comparators and pH acidometers. 5.7.3 Reagents and solutions
Permissible tolerance (
.3. 37
5.7.3.12H4.U1 standard flushing liquid: weigh 111% potassium dihydrogen phosphate (KITC, JT,: 0.21F), dissolve in water, dilute to 11.,
5.7.3.2FIri.87 standard flushing liquid, weigh 12CC of potassium dihydrogen phosphate (KHPO3.3986) and 120~13CC of sodium dihydrogen phosphate (NaHPO3.538) dissolved in water, both diluted to 1L. 5.7.3.3pH9.18 standard buffer: weigh sodium sulfate (Vm1,·nH.Q) <balanced in a solution containing sugar and sodium hydroxide> 3.8 years, dissolve in water, dilute to 1E..5. 7. 4. Weigh the sample into a 100ml beaker, add 50L of hot water (to drive out carbon dioxide), stir for 15 minutes, and place for 30 minutes. Use a pH meter to measure the pH. 5.7.5. The average value of the analytical results is the final value, and the absolute difference is not less than 2.2 2H. 5.8 The determination of heavy metal content, insect mortality rate and large seedling value is carried out according to H8172. 6. Inspection rules 6.1 The quality index in this standard adopts the "comparison method of standard value" in GJ1125C/NY575-?J02. 6.2 The organic fertilizer production enterprise quality supervision department shall conduct inspection, and the production enterprise shall ensure that all organic fertilizers leaving the factory meet the requirements of 4. and 4.3 of this standard. According to the requirements of this standard, each batch of the factory's products should be accompanied by a certificate of air volume, which also includes: enterprise name, product name, number, product net weight, total content of products, production date and wood standard number: 6.3 Gold content, single insect egg mortality rate, and the following conditions should be tested according to the inspection items. During formal production, the following conditions should be tested: 1) During the production of the factory, after a certain amount of work is accumulated, a periodic inspection should be carried out. c) When the national quality inspection requirements are met. 6.4 If any of the indicators in the given results do not meet the requirements of this standard, the organic fertilizer products should be re-selected from the packaging of twice the amount for re-testing. If any indicator does not meet the requirements of this standard, the batch of fertilizers shall be treated as unqualified. 6.5 Fruit samples
6.5.1 Sampling method
For the detailed sampling method of the products, please see the table: Table 7 Sampling method of organic fertilizer products
Total effective
50 ~-94
E2~[nt
Effective sample inspection level
All final amount
Total setting
JC2~ 125
125--151
159--181
1E2--216
717~:54
When the total bag efficiency is passed through 512 rounds, the sampling bag distribution is calculated according to the formula (\): Min sample policy teaching
Lian sample you 8×
Where:
N—total number of packages taken in each batch.
Total number of samples
235--286
237 -- 343
335--155
431~512
Selection policy
Put the samples on the shelf and insert them into the picker from the diagonal line of each bag. Take at least 1 sample, and the total amount of each non-pulled sample shall not be less than 2.
E.5.2 Packaged products
When sampling in bulk production, GB gate ship shall be used for sampling. 6.5. 3. Samples are divided into 4 parts: 1. The samples are clean and evenly distributed, and the labels are affixed with the "company name, product name, batch production year, sample name, one bottle for physical analysis, two pieces for protection in case of change.
Packaging, labeling, transportation and storage
7.1 Plastic woven fabrics with film and woven fabrics and vinyl inner packaging: Net content per bag: 50 = 0.3 k%. 141 ± 0.4) k (2510.2> kg The average content of each bag is 0.0 kg, 10. kg, 2. kg. 7.2 Organic industry packaging should be marked: product name, trade name, organic matter content, total nutrient content, net to, standard number, certification number, name. Address: Other concubines CB implementation || tt || 7.3 Organic fertilizers should be stored in a cool place and should be protected from moisture and cracks during transportation. 9
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