Some standard content:
Agricultural Industry Standard of the People's Republic of China
NY481—2002
Organic-inorganic compound fertilizer
Organic-inorganic compound fertilizer2002-01-04 Issued
2002-02-01 Implementation
Issued by the Ministry of Agriculture of the People's Republic of China
Chapter 4, Chapter 6, Chapter 7 and Chapter 8 of this standard are mandatory clauses, and the rest are recommended clauses. This standard is proposed by the Crop Management Department of the Ministry of Agriculture. NY4812002
Drafting units of this standard: National Agricultural Technology Extension Service Center, National Fertilizer Quality Supervision and Inspection Center (Beijing), Huazhong Agricultural University. The main drafters of this standard: Du Sen, Gao Xiangzhao, Xu Fangsen, Chen Shoulun, Ma Changbao, Wang Xu, Yang Fan, Jiang Qiquan. 1 Scope
Organic-inorganic compound fertilizer
NY481—2002
This standard specifies the technical requirements, test methods, inspection rules, labeling, packaging, transportation and storage of organic-inorganic compound fertilizers. This standard applies to organic-inorganic compound fertilizers made from organic materials such as poultry manure, animal and plant residues as the main raw materials, which are fermented and decomposed and inorganic fertilizers are added.
2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to the agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all undated references, the latest versions shall apply to this standard. GB/T1250 Expression and determination methods of limit values GB/T6274 Terminology of fertilizers and soil conditioners GB/T6679 General rules for sampling of solid chemical products GB8172 Control standards for agricultural use of urban garbage
GB8569
Packaging of solid chemical fertilizers
Laboratory sample preparation of compound fertilizers
GB/T8571
Determination of available phosphorus content in compound fertilizers
GB/T8573
Determination of free water content in compound fertilizers Vacuum oven method GB/T 8576
GB/T17767.1 Determination of total nitrogen content in organic-inorganic compound fertilizers GB/T17767.3 Determination of total potassium content in organic-inorganic compound fertilizers GB18382 Fertilizer labeling content and requirements
GB15063—2001 Compound fertilizers (compound fertilizers) HG/T2843 Standard titration solutions, standard solutions, reagent solutions and indicator solutions commonly used in chemical analysis of fertilizer products 3 Terms and definitions
The terms and definitions established in GB/T6274 and the following terms and definitions apply to this standard. Organic-inorganic compound fertilizers Organic-inorganic compound fertilizers are products derived from organic and inorganic substances with marked nutrients, and are made by mixing and (or) combining organic and inorganic fertilizers. 4 Requirements
4.1 Appearance: Granular or powdery products, free of mechanical impurities and no odor. 4.2 The technical indicators of organic-inorganic compound fertilizers shall meet the requirements of Table 1. NY481—2002
Table 1 Technical indicators of organic-inorganic compound fertilizers
Total nutrients Nitrogen + Available phosphorus (P20) + Potassium (K2O).% Organic matter, %
Water (HO).%
Acidity (pH)
Note: The content of a single nutrient constituting the product shall not be less than 2.0%, and the absolute value of the negative deviation between the measured value of a single nutrient and the indicated value shall not be greater than 1.5%. 4.3 The indicators of heavy metal content, insect egg mortality and coliform value in organic-inorganic compound fertilizers shall meet the requirements of GB8172. 5 Test methods
The preparation of reagents, water and solutions used in this standard shall comply with the provisions of HG/T2843 when the specifications and preparation methods are not specified. 5.1 Appearance
Visual determination.
5.2 Determination of total ammonia content
Perform according to GB/T17767.1.
5.3 Determination of effective phosphorus content
Perform according to GB/T8573.
5.4 Determination of total potassium content
Perform according to GB/T17767.3.
5.5 Determination of moisture content by vacuum oven method
Perform according to GB/T8576.
5.6 Determination of organic matter content by potassium dichromate volumetric method 5.6.1 Principle
Use a quantitative potassium dichromate-sulfuric acid solution under heating conditions. Oxidize the organic carbon in the organic-inorganic compound fertilizer, and titrate the remaining potassium dichromate with a standard ferrous sulfate solution. At the same time, use silicon dioxide as an additive for a blank test. Calculate the amount of organic carbon based on the oxidant consumption before and after oxidation, and multiply it by a coefficient of 1.724 to obtain the organic matter content. 5.6.2 Reagents and Materials
5.6.2.1 Silicon dioxide: powder.
5.6-2.2 Sulfuric acid (ol.84).
5.6.2.3 Phenanthroline indicator: weigh 1.485g of phenanthroline and 0.695g of ferrous sulfate and dissolve in 100mL of water, store in a brown bottle.
5.6.2.4 Potassium dichromate-sulfuric acid solution: c (1/6KCrzO,) = 0.5mol/L, weigh 49.03g of potassium dichromate and dissolve in 600mL~800mL of water, dilute to 1L with water, transfer the solution to a 3L large beaker. Take another 1L of concentrated sulfuric acid and slowly add it to the potassium dichromate solution, stirring continuously. To avoid the solution from heating up rapidly, place the large beaker in a basin filled with cold water to cool it down. After adding about 100 mL of sulfuric acid, wait for a while and add another part of sulfuric acid when the solution temperature drops to a level that is not too hot to touch. 5.6.2.5 Potassium dichromate standard solution: c1/6KzCr20,) = 0.4000mol/L. Weigh 19.612g potassium dichromate (superior purity) that has been dried at 130C for 2~~3h, dissolve it in a small amount of water, then transfer it to a 1L volumetric flask without damage, and mix it to volume. 5.6.2.6 Ferrous sulfate standard solution: Weigh 112g ferrous sulfate (FeSO.*7HO), dissolve it in 800mL of water, add 20mL of sulfuric acid (5.6.2.2), slowly add it to the ferrous sulfate solution, dilute it to 1L with water (filter if necessary), mix it evenly and store it in a brown bottle. This solution 2
NY481—2002
is easily oxidized by air. Its accurate concentration should be calibrated with potassium dichromate standard solution each time it is used. Calibration: Pipette 20mL of potassium dichromate standard solution (5.6.2.5) into a 250mL conical flask, add 5mL of sulfuric acid (5.6.2.2), 50mL~60mL of water, and 5 drops of o-phenanthroline indicator. Titrate with ferrous sulfate standard solution until the solution changes from orange-yellow to blue-green and finally to brown-red as the end point. According to the consumption of ferrous sulfate solution, calculate its accurate concentration according to formula (1): c2:GXV
Where:
The concentration of potassium dichromate standard solution, in moles per liter (mol/L): C
V-the volume of potassium dichromate standard solution absorbed, in milliliters (mL); V. ——The volume of ferrous sulfate standard solution consumed during titration, in milliliters (mL) 5.6.3 Instruments
Usually laboratory instruments and water baths.
.....(1)
5.6.4 Analysis steps
5.6.4.1 Prepare laboratory samples according to GB/T8571 and grind them to pass through a 0.5 mm sieve. Weigh 0.05-0.5 g (accurate to 0.0001) of the sample (the amount of sample weighed depends on the organic matter content) into a 250 mL conical flask, and accurately add 25.0 mL of potassium dichromate-sulfuric acid solution (5.6.2.4). After shaking thoroughly, add a small curved neck funnel, place in boiling water and keep warm for 30 minutes, shaking every 5 minutes. Take out and cool to room temperature, rinse the small funnel with water, collect the washing liquid in a conical flask, add water to 120mL, add 6 drops of o-Phthiophene indicator (5.6.2.3), and titrate with ferrous sulfate standard solution (5.6.2.6) until it turns brownish red. At the same time, replace the sample with silicon dioxide (5.6.2.1), and perform a blank test according to the same analytical steps and using the same reagents. If the amount of ferrous sulfate standard solution used to titrate the sample is less than one-third of the amount of ferrous sulfate standard solution used in the blank test, the sample weight should be reduced and re-measured. 5.6.4.2 Determination of chloride ion content: Determine the chloride ion content c (%) according to the provisions of 5.7 of GB15063-2001. 5.6.5 Calculation and expression of analysis results
5.6.5.1 Calculation
Organic matter content is expressed as mass percentage (%) and is calculated according to formula (2): [V-V) Xc X0.03 ×100 -- 0.084 7]×1. 724.. 2) Organic matter (%) =
Wherein:
-The volume of ferrous sulfate standard solution consumed in blank test, in milliliters (mL); Va
The volume of ferrous sulfate standard solution consumed in sample determination, in milliliters (mL); Concentration of ferrous sulfate standard solution. Unit is mole per liter (mol/L); Oxygen ion content, %;
The molar mass of one quarter of carbon atom, in grams per mole (g/mol): 0.003-
The conversion factor of organic carbon to organic matter; The conversion factor of ammonium ion to carbon:
The mass of the sample, in grams (g).
Take the arithmetic mean of the parallel determination results as the determination result. 5.6.5.2 Allowable difference
The absolute difference of the parallel determination results shall not exceed 0.6%. The absolute difference of the determination results of different laboratories shall not exceed 1.2%. 5.7 Determination of pH pH meter method
5.7.1 Principle
The sample is soaked in water for equilibrium and then measured with a pH meter. NY481—2002
5.7.2 Reagents and solutions
5.7.2.1 pH 4.01 standard buffer solution: Weigh 10.21 g of potassium hydrogen phthalate (KHCaHO.) dried at 105°C and dissolve it in water to dilute it to 1 L.
5.7.2.2PH6.87 standard buffer solution: weigh 3.398g of dried potassium dihydrogen phosphate (KHPO4) and 3.53g of anhydrous disodium hydrogen phosphate (NaHPO4) (dry at 120C~130C for 2h) and dissolve in water to dilute to 1L5.7.2.3PH9.18 standard buffer solution: weigh borax (NazB.O, *10H.O) and dissolve in water to dilute to 1L. 5.7.3 Instruments
Usually laboratory instruments and pH acidometer. 5.7.4 Operation steps
Weigh 10.00g of fresh sample in a 100mL beaker, add 50mL of carbon dioxide-free water, stir for 1min, let stand for 30min, and measure with pH acidometer. Before measurement, calibrate the acidometer with standard buffer solution, and recalibrate with standard buffer solution after measuring 10 samples.
Take the arithmetic mean of the parallel determination results as the determination result. 5.7.5 Allowable difference
The absolute difference of the parallel determination results shall not exceed 0.2PH units. 6 Inspection rules
6.1 The qualified judgment of the product quality indicators in this standard shall adopt the "rounded value comparison method" in GB/T1250. 6.2 The products shall be inspected by the enterprise quality supervision department, and the manufacturer shall ensure that all products leaving the factory meet the requirements of this standard. Each batch of products leaving the factory shall be accompanied by a quality certificate, the contents of which shall include: the name and address of the manufacturer, the name, batch number or production date of the product, the net content of the product, the total nutrient content, and the nitrogen, available phosphorus, potassium, organic matter content and the number of this standard. 6.3 Users have the right to inspect the received products according to the inspection rules and inspection methods specified in this standard to verify whether their quality indicators meet the requirements of this standard.
6.4 If one of the indicators in the inspection results does not meet the requirements of this standard When required, samples should be taken from double the amount of packaging bags for re-testing. If even one indicator of the re-testing result does not meet the requirements of this standard, the entire batch of products cannot be accepted. 6.5 Products are inspected in batches. One or two days' output is considered a batch, and the maximum batch is 500t. 6.6 Bag products are sampled according to Table 2. When the number exceeds 512 bags, the sample is calculated according to formula (3). If the calculation result is a decimal, it is rounded to an integer. Table 2 Number of sampling bags
Total number of bags
65~~81
82~101
102125
126~151
152~181Www.bzxZ.net
Minimum number of sampling bags
Total number of bags
182--216|| tt||217~254
255-296
297343
344~394
395--450
451~512
Minimum number of sampling bags
Where:
N Total number of bags per batch.
Number of sampling bags=3×N
NY481—2002
（3）
Calculate the results according to Table 2 or formula (3), then select a certain number of bags, insert the sampler from the longest diagonal line of each bag to three-quarters of the bag, take out no less than 100 samples, and the total sample volume for each batch shall not be less than 2kg. 6.7 Bulk products shall be sampled in accordance with the provisions of GB/T6679. 6. 8 Sample reduction: Mix the sample quickly, use a reducer or quartering method to reduce the sample to about 1kg, and pack it into two clean, dry wide-mouth bottles or polyethylene bottles with ground stoppers, seal and label them, indicate the name of the manufacturer, product name, batch number, sampling date, and name of the sampler. One bottle is used for product quality analysis, and the other bottle is kept for 2 months for future reference. Labeling
The packaging labeling shall comply with GB18382, and the organic matter content and product registration certificate number shall be indicated. If the chloride ion content in the product is greater than 3.0%, the packaging container shall be marked with "containing chlorine".
8 Packaging, transportation and storage
The packaging shall comply with GB8569. The product should be stored in a cool and dry place, and should be protected from moisture, sunlight, and cracks during transportation. NY481-2002
Agriculture of the People's Republic of China
Industry Standard
Organic-inorganic compound fertilizer
NY481—2002
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 6852394668517548
China Standards Press Qinhuangdao Printing Factory Printed by Xinhua Bookstore, Beijing Distribution Office Distributed by Xinhua Bookstores in various regions Sold by Xinhua Bookstores*
Format 880×12301/16 Printing sheet 3/4 Number of words 12 First edition April 2002 First printing April 2002 Print run 1-1000
Book number: 155066·2-14237 Price: RMB 10.00 Website: bzcbs.com
Copyright reserved. Infringements will be investigated
Report phone number: (010) 685335331 The qualified judgment of product quality indicators in this standard shall adopt the rounded value comparison method in GB/T1250". 6.2 Products shall be inspected by the enterprise quality supervision department, and the manufacturer shall ensure that all products shipped meet the requirements of this standard. Each batch of products shipped shall be accompanied by a quality certificate, which includes: the name and address of the manufacturer, the name of the product, the batch number or the production date, the net content of the product, the total nutrient content, and the nitrogen, available phosphorus, potassium, organic matter content and the number of this standard. 6.3 Users have the right to inspect the received products according to the inspection rules and inspection methods specified in this standard to verify whether their quality indicators meet the requirements of this standard.
6.4 If one of the indicators in the inspection results does not meet the requirements of this standard, samples shall be taken from the double amount of packaging bags for re-inspection. If even one of the indicators in the re-inspection results does not meet the requirements of this standard, the entire batch of products cannot be accepted. 6.5 Products are inspected in batches. The output of one or two days is considered as a batch, and the maximum batch is 500t. 6. For 6-bag products, samples shall be taken according to Table 2. When the number exceeds 512 bags, samples shall be taken according to the calculation results of formula (3). If the calculation result is a decimal, it shall be rounded up to an integer. Table 2 Number of sampling bags
Total number of bags
65~~81
82~101
102125
126~151
152~181
Minimum number of sampling bags
Total number of bags
182--216||tt| |217~254
255-296
297343
344~394
395--450
451~512
Minimum number of sampling bags
Where:
N Total number of bags per batch.
Number of sampling bags=3×N
NY481—2002
（3）
Calculate the results according to Table 2 or formula (3) , then take a certain number of bags, insert the sampler from the longest diagonal line of each bag to three-quarters of the bag, take out no less than 100 samples, and the total sample volume of each batch shall be no less than 2kg. 6.7 Bulk products shall be sampled in accordance with GB/T6679. 6.8 Sample reduction: Mix the samples quickly, reduce the samples to about 1kg using a reducer or quartering method, and pack them in two clean, dry wide-mouth bottles or polyethylene bottles with ground stoppers, seal and label them, indicating the name of the manufacturer, product Product name, batch number, sampling date, name of the sampler, one bottle for product quality analysis, the other bottle for 2 months for future reference. Labeling
Packaging labeling shall comply with GB18382, and shall indicate the organic matter content and product registration number. If the chloride ion content in the product is greater than 3.0%, the packaging container shall be marked with "containing chlorine".
8 Packaging, transportation and storage
Packaging shall comply with GB8569. The product shall be stored in a cool and dry place. It shall be protected from moisture and dirt during transportation. NY481-2002
Agriculture
Industry Standard
Organic-inorganic compound fertilizer
NY481—2002
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 6852394668517548
China Standards Press Qinhuangdao Printed by the printing factory; distributed by Beijing Xinhua Bookstore; sold by Xinhua Bookstores in various places*
Format: 880×12301/16 Printing sheet: 3/4 Number of words: 12 First edition: April 2002 First printing: April 2002 Number of copies: 1-1000
Book number: 155066·2-14237 Price: RMB 10.00 Website: bzcbs.com
Copyright: All rights reserved. Infringements must be investigated
Report phone number: (010) 685335331 The qualified judgment of product quality indicators in this standard shall adopt the rounded value comparison method in GB/T1250". 6.2 Products shall be inspected by the enterprise quality supervision department, and the manufacturer shall ensure that all products shipped meet the requirements of this standard. Each batch of products shipped shall be accompanied by a quality certificate, which includes: the name and address of the manufacturer, the name of the product, the batch number or the production date, the net content of the product, the total nutrient content, and the nitrogen, available phosphorus, potassium, organic matter content and the number of this standard. 6.3 Users have the right to inspect the received products according to the inspection rules and inspection methods specified in this standard to verify whether their quality indicators meet the requirements of this standard.
6.4 If one of the indicators in the inspection results does not meet the requirements of this standard, samples shall be taken from the double amount of packaging bags for re-inspection. If even one of the indicators in the re-inspection results does not meet the requirements of this standard, the entire batch of products cannot be accepted. 6.5 Products are inspected in batches. The output of one or two days is considered as a batch, and the maximum batch is 500t. 6. For 6-bag products, samples shall be taken according to Table 2. When the number exceeds 512 bags, samples shall be taken according to the calculation results of formula (3). If the calculation result is a decimal, it shall be rounded up to an integer. Table 2 Number of sampling bags
Total number of bags
65~~81
82~101
102125
126~151
152~181
Minimum number of sampling bags
Total number of bags
182--216||tt| |217~254
255-296
297343
344~394
395--450
451~512
Minimum number of sampling bags
Where:
N Total number of bags per batch.
Number of sampling bags=3×N
NY481—2002
（3）
Calculate the results according to Table 2 or formula (3) , then take a certain number of bags, insert the sampler from the longest diagonal line of each bag to three-quarters of the bag, take out no less than 100 samples, and the total sample volume of each batch shall be no less than 2kg. 6.7 Bulk products shall be sampled in accordance with GB/T6679. 6.8 Sample reduction: Mix the samples quickly, reduce the samples to about 1kg using a reducer or quartering method, and pack them in two clean, dry wide-mouth bottles or polyethylene bottles with ground stoppers, seal and label them, indicating the name of the manufacturer, product Product name, batch number, sampling date, name of the sampler, one bottle for product quality analysis, the other bottle for 2 months for future reference. Labeling
Packaging labeling shall comply with GB18382, and shall indicate the organic matter content and product registration number. If the chloride ion content in the product is greater than 3.0%, the packaging container shall be marked with "containing chlorine".
8 Packaging, transportation and storage
Packaging shall comply with GB8569. The product shall be stored in a cool and dry place. It shall be protected from moisture and dirt during transportation. NY481-2002
Agriculture
Industry Standard
Organic-inorganic compound fertilizer
NY481—2002
Published by China Standards Press
No. 16, Sanlihebei Street, Fuxingmenwai, Beijing
Postal Code: 100045
Tel: 6852394668517548
China Standards Press Qinhuangdao Printed by the printing factory; distributed by Beijing Xinhua Bookstore; sold by Xinhua Bookstores in various places*
Format: 880×12301/16 Printing sheet: 3/4 Number of words: 12 First edition: April 2002 First printing: April 2002 Number of copies: 1-1000
Book number: 155066·2-14237 Price: RMB 10.00 Website: bzcbs.com
Copyright: All rights reserved. Infringements must be investigated
Report phone number: (010) 68533533
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