Some standard content:
HG 3621—1999
The product quality control items of this standard are determined based on the chemical industry standard HG/T2467.11996 "Specifications for the Preparation of Pesticide Technical Product Standards" of the People's Republic of China. The test method for the active ingredient of this standard is equivalent to the International Pesticide Analysis Cooperation Council (CIPAC) method - High Performance Liquid Chromatography
This standard was proposed by the Technical Supervision Department of the former Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Shenyang Chemical Research Institute of the Ministry of Chemical Industry. The main drafting unit of this standard: Hunan Chemical Research Institute. The participating drafting units of this standard: Hunan Haili Chemical Co., Ltd. Test Plant, Shandong Huayang Pesticide Chemical Group Co., Ltd., Jiangsu Tongshan Pesticide General Factory.
The main drafters of this standard: Huang Xiangyun, Zhou Zhichun, Liu Zhijuan, Liu Ziyou, Zheng Jingyu, Shao Zhumin. 1198
Chemical Industry Standard of the People's Republic of China
Carbofuran Technical
Carbofuran Technical
Other names, structural formulas and basic physicochemical parameters of Carbofuran are as follows:ISO common name: Carbofuran
CIPAC digital code: 276
Chemical name: 2,3-Diamino-2,2-dimethylbenzofuran-7-yl N-methylcarbamate Structural formula:
CO—NH—CH3
Empirical formula: C12H1sNO3
Relative molecular mass: 221.3 (according to the 1993 international relative atomic mass) Biological activity: Insecticidal
Melting point (℃): 151～152
Vapor pressure (33℃): 2.7MPa
HG 3621-1999
Solubility (g/L, 25℃): 0.7 in water; 150 in acetone, 270 in dimethylformamide; 140 in acetonitrile; 90 in cyclohexanone, 40 in benzene; 40 in ethanol; slightly soluble in petroleum ether and xylene. Stability: Decomposition begins at 180℃, relatively stable in acidic medium, unstable in alkaline medium, and temperature and alkalinity have a greater impact on the hydrolysis rate. 1 Scope
This standard specifies the requirements, test methods, and marking, labeling, packaging, storage and transportation of carbofuran technical. This standard is applicable to carbofuran technical composed of impurities generated during its production. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB190—1990 Dangerous Goods Packaging Marking
GB/T601-1988 Preparation of Standard Solution for Titration Analysis (Volumetric Analysis) of Chemical Reagents GB/T1250-1989 Method for Representation and Judgment of Limit Values GB/T1600-1979 (1989) Method for Determination of Moisture Content in Pesticides GB/T1604-1995 Acceptance Rules for Commercial Pesticides GB/T1605—1979 (1989) Method for Sampling Commercial Pesticides GB3796-1983 General Rules for Pesticide Packaging
Approved by the State Administration of Petroleum and Chemical Industry on June 16, 1999, and implemented on June 1, 2000
3 Requirements
HG 3621---1999
3.1 Appearance: White or grayish white, light yellow crystals, without visible foreign impurities. 3.2 Benzene technical shall meet the requirements of Table 1. Table 1 Control Items of Carbofuran Technical Material
Superior Product
Carbofuran Content, %
Furanol (2,3-dihydro-2,2-dimethyl-7-hydroxybenzofuran), %Moisture, %
Acetone Insoluble Matter, %
Acidity (in terms of H,SO4), %
4 Test Method
4.1 Sampling
Qualified Product
According to the "Technical Material Sampling* Method" in GB/T1605-1979 (1989), the number of sampled packages shall be determined by the random number table method. The final sampling volume should be no less than 250g.
4.2 Identification test
This identification test can be carried out simultaneously with the determination of the content of carbofuran. Under the same high performance liquid chromatography (HPLC) operating conditions, the relative difference between the retention time of a certain chromatographic peak of the sample solution and the retention time of the chromatographic peak of the standard solution carbofuran should be within 1.5%. 4.3 Determination of carbofuran content
4.3.1 Method summary
The sample is dissolved in methanol containing benzophenone as an internal standard, methanol-10 water is used as the mobile phase, and a stainless steel column and a column filled with a C-bonded solid phase are used. Ultraviolet detector, high performance liquid chromatography separation and determination of carbofuran in the sample. 4.3.2 Reagents and bath solution
Methanol: HPLC grade, filtered through a 0.5um filter membrane. Water: twice distilled water, filtered through a 0.5μm filter membrane. Carbofuran standard: known content, greater than or equal to 99.0%. Fentanol (2,3-dihydro-2,2-dimethyl-7-hydroxybenzofuran). Internal standard: acetophenone, should not contain impurities that interfere with the analysis. Internal standard solution: weigh 1000mg of acetophenone and dilute it to 1000mL with methanol and shake well. 4.3.3 Instruments and equipment||t t||High performance liquid chromatograph: with variable wavelength UV detector. Chromatographic data processor.
Chromatographic column: 250mm×4.6mm(id) stainless steel column, with Crs bonded stationary phase, 5μum. Guard column: 20mm×4.6mm(id) stainless steel column, with C bonded stationary phase, 5um. Injector: 50u.
4.3.4 High performance liquid chromatograph operating conditions
Mobile phase: methanol + water - 1 + 1 (volume ratio). If there is any sign of decomposition on the column, add phosphoric acid (3 to 5 drops per column). Flow: 1 mL/min.
Guiyi: 40℃.
Detection wavelength: 280nm.
Injection volume: 10 μL.
Detector sensitivity: full scale 0.2 absorbance. HG 3621—1999
Retention time: carbofuran about 14min; internal standard about 10min; furan about 18min. 2
t (min)
1——Internal standard (acetophenone), 2-carbofuran; 3-furoxol3
Figure 1 HPLC chromatogram of carbofuran original drug (with internal standard, furanol) The above operating parameters are typical (see Figure 1). The given operating parameters can be appropriately adjusted according to the characteristics of the instrument in order to obtain the best effect. 4.3.5 Column optimization
Set the column temperature to 40℃, determine the retention time of carbofuran (preferably between 12 and 15 minutes), change the mobile phase composition ratio if necessary, and determine the retention time and separation of acetophenone on carbofuran. If acetophenone is not completely separated from carbofuran, reduce the proportion of methanol in the mobile phase. This may result in a retention time of carbofuran greater than 15 minutes on some columns. Determine the retention time of furanol. If it interferes with carbofuran, it needs to be optimized again. Increase or decrease the column temperature at 5℃ intervals, and change the mobile phase ratio to keep the separation and retention time of carbofuran and acetophenone unchanged. Pay attention to the retention time and separation of furanol. When furanol and other impurities are completely separated from carbofuran, the sample analysis can begin.
4.3.6 Determination steps
a) Preparation of standard solution
Weigh about 45 mg of carbofuran standard (accurate to 0.0001 g) and about 45 mg of furanol in a 100 mL volumetric flask, add 50 mL of internal standard solution with a pipette, mix well, add 50 mL of deionized water, shake well, degas by ultrasonic and filter with a pore size of 0.45 μm. b) Preparation of sample solution
Weigh about 45 mg of carbofuran sample (accurate to 0.0001 g) in a 100 mL volumetric flask, add 50 mL of internal standard solution with the same pipette as a), mix well, add 50 mL of deionized water, shake well, degas by ultrasonic and filter with a pore size of 0.45 μm. 1201
c) Determination
HG 3621--1999
Under the above operating conditions, after the instrument baseline is stable, repeatedly inject the standard solution, calculate the relative response value of each injection, and when the relative response value of two adjacent injections changes less than 1%, perform the determination in the order of standard solution, sample solution, sample solution, and standard solution. 4.3.7 Calculation
Average the ratios of the peak areas of chlorpyrifos to the internal standard in the two injections of sample solution and the two injections of standard solution before and after the sample. The chlorpyrifos content (X,) expressed as mass percentage is calculated according to formula (1): ram,P
-The average value of the peak area ratio of chlorpyrifos to the internal standard in the standard solution; Where: ri—the average value of the peak area ratio of chlorpyrifos to the internal standard in the sample solution; m1—the mass of the chlorpyrifos standard,g;
The mass of a sample, g;
The mass percentage of carbofuran in the standard sample. 4.3.8 Allowable difference
The difference between two parallel determination results shall not be greater than 1.2%. 4.4 Determination of furanol content
4.4.1 Summary of method
Furanol reacts with sodium nitrite under acidic conditions to form nitrosofuranol, which forms a yellow quinone-type compound after adding methylamine solution. The spectrophotometric determination is carried out at a wavelength of 436nm. 4.4.2 Reagents and solutions
Hydrochloric acid.
Sodium nitrite.
Acetone.
Methylamine aqueous solution: chemically pure (it can also be used after gaseous methylamine is absorbed by distilled water and the content is determined). Hydrochloric acid solution: c(HCI)=0. 1 mol/L. Methylamine aqueous solution: 25g/L, titrate with hydrochloric acid standard solution to measure its precise concentration. Sodium nitrite aqueous solution: 1.0mol/L, weigh 1.7g sodium nitrite and place it in a 25mL volumetric flask, dilute with distilled water to the scale and shake well (use on the same day).
Furanol standard solution: weigh about 40mg (accurate to 0.0002g) of furanol with a content greater than or equal to 98.0% in a 50mL volumetric flask, add acetone to the volume, shake well, take 2.5mL of this solution in a 25mL volumetric flask, add acetone to the volume, shake well, the furanol concentration of this solution is about 0.08mg/mL.
4.4.3 Instruments and equipment
Spectrophotometer.
Constant temperature water solution: control accuracy ±0.5℃.
Graduated colorimetric tube: 25mL.
Volume flask: 25, 50, 250mL.
Pipette: 1, 2 mL graduated pipette.
4.4.4 Determination steps
Weigh 0.01~0.02g (accurate to 0.0002g) of carbofuran technical, place it in a 25mL graduated colorimetric tube, and add 2mL of acetone to dissolve it. Accurately add 1.5mL of 0.1mol/L hydrochloric acid solution, shake well, add 2mL of 1.0mol sodium nitrite along the wall of the colorimetric tube, shake accurately for 1min, place it in a 40℃ constant temperature water bath and heat for 20min, take out the colorimetric tube, cool to room temperature, and then use a 1mL pipette to add 0.5mL of 25g/L methylamine aqueous solution, dilute to 10mL with water, and shake well. The solution is placed in a 1cm colorimetric tube, and its absorbance is measured at a wavelength of 436nm. At the same time, accurately absorb 1mL of furanol standard solution, place it in a 25mL colorimetric tube, and add 1mL of acetone. The following operations are the same as for the sample. 1202
4.4.5 Calculation
HG 3621—1999
The free phenol (in terms of furanol) content (X,) expressed as a mass percentage is calculated according to formula (2). X,
Wherein: mi-
Mass of furanol in the standard solution, mg;
Mass of the sample solution, mg
A-Absorbance of the standard solution;
A Absorbance of the sample solution.
4.4.6 Allowable difference
The difference between two parallel determinations should not be greater than 0.02%. 4.5 Determination of moisture
The Karl Fischer potential endpoint method in GB/T1600-1979 (1989) is used. 4.6 Determination of solid insoluble matter in acetone
4.6.1 Reagents and solutions
Acetone: dried over anhydrous sodium sulfate.
4.6.2 Instruments and equipment
Erlenmeyer flask: with ground glass joint, 250 mL. Reflux condenser: matched with the Erlenmeyer flask. Sand core crucible; 3#
Oven.
4.6.3 Test steps
(2)
Weigh about 10 g of sample (accurate to 0.01 g), put it into an Erlenmeyer flask, add 50 mL of acetone, and heat to reflux until all soluble matter is dissolved. Filter the solution with a crucible with a constant mass, and then wash the Erlenmeyer flask and crucible with 60 mL of acetone several times to ensure that all solid matter is transferred to the crucible and all soluble matter on the wall is washed away. Place the crucible in an oven at 110℃ and dry for 30min. Take it out and cool it to room temperature in a desiccator, and weigh it until the mass is constant.
The content of solid insoluble matter in the two ketones expressed as mass percentage (X3) is calculated according to formula (3): m - mo × 100
Wherein: mi-
The mass of the sand core crucible and the insoluble matter after the mass is constant, name; the mass of the sand core crucible, g
m——the mass of the sample, g.
4.7 Determination of acidity
4.7.1 Reagents and solutions
Acetone.
Standard sodium hydroxide titration solution: c(NaOH) 0.02mol/L, prepared according to the method specified in GB/T601. Mix indicator solution: 2 mL of 2g/L methyl red ethanol solution and 10 mL of 2g/L bromocresol green ethanol solution. 4.7.2 Determination steps
·（3）
Weigh 8g of sample (accurate to 0.0001g) and place it in a 250mL conical flask, add 100mL acetone, shake to dissolve the sample, add 0.6mL indicator solution, and titrate with sodium hydroxide standard titration solution until the color changes from yellow to blue-green. At the same time, make a blank determination.
The acidity (X) of the sample expressed as mass percentage (in terms of H2SO4) is calculated according to formula (4): c(V/-Vo) × 0. 049 × 100*
（4）
HG36211999
The actual concentration of sodium hydride standard solution, mol/, where:
V, the volume of sodium hydroxide standard solution consumed by titrating the sample solution, mL, V. The volume of sodium hydroxide standard solution consumed by titrating the blank solution, mLm
—the mass of the sample·,
0.049---the mass of sulfuric acid in grams equivalent to 1.00mL sodium hydroxide standard solution [c (NaOH) = 1.000mol/L]. 4.8 Product inspection and acceptance
The inspection and acceptance of products shall comply with the relevant provisions of GB/T1604 and shall be accepted within three months from the date of arrival. The rounded value comparison method shall be used for the treatment of limit values.
5 Marking, labeling, packaging, purchase and transportation
5.1 The marking, labeling and packaging of Budweiser technical shall comply with the relevant provisions of GB3796. As a commodity circulating technical, it shall also have a trademark and production license number.
5.2 The Budweiser technical is packed with a layer of plastic film bag inside and a commercial propylene woven bag outside, and then the bag is sealed and placed in an iron barrel, with a net content of (100±0.2)kg per barrel.
5.3 Other forms of packaging may be used according to user requirements or order agreements, but they must comply with the relevant provisions of GB3796. 5.4 Packages should be stored in ventilated and dry warehouses. 5.5 During storage and transportation, strictly prevent moisture and sunlight, do not mix with food, seeds, and feed, avoid contact with skin and eyes, and prevent inhalation through the mouth. 5.6 Safety
Carbofuran is a highly toxic carbamate insecticide. It is toxic if swallowed or inhaled, and can also penetrate through the skin. Therefore, when using this product, you should wear protective clothing and protective gloves. After the skin or exposed parts of the body come into contact with this product, they should be washed with fertilizer and water in time. If poisoning occurs, atropine can be injected intramuscularly to detoxify in mild cases, and a doctor should be consulted if necessary. 12045℃.
Graduated colorimetric tube: 25mL.
Volume flask: 25, 50, 250mL.
Pipette: 1, 2 mL graduated pipette.
4.4.4 Determination steps
Weigh 0.01~0.02g (accurate to 0.0002g) of carbofuran technical, place it in a 25mL graduated colorimetric tube, add 2mL acetone to dissolve it. Accurately add 1.5mL of 0.1mol/L hydrochloric acid solution, shake well, add 2mL of 1.0mol sodium nitrite along the wall of the colorimetric tube, shake accurately for 1min, place it in a 40℃ constant temperature water bath and heat for 20min, take out the colorimetric tube, cool it to room temperature, then use a 1mL pipette to add 0.5mL of 25g/L methylamine aqueous solution, dilute to 10mL with water, and shake well. The solution is placed in a 1cm colorimetric tube and its absorbance is measured at a wavelength of 436nm. At the same time, accurately absorb 1mL of furanol standard solution, place it in a 25mL colorimetric tube, and add 1mL of acetone. The following operations are the same as for the sample. 1202
4.4.5 Calculation
HG 3621—1999
The free phenol (calculated as furanol) content (X,) expressed as mass percentage is calculated according to formula (2). X,
Where: mi-
Mass of furanol in the standard solution, mg;
Mass of the sample solution, mg
A-Absorbance of the standard solution;
A Absorbance of the sample solution.
4.4.6 Allowable difference
The difference between two parallel determinations should not be greater than 0.02%. 4.5 Determination of moisture content
Carry out according to the Karl Fischer potential endpoint method in GB/T1600-1979 (1989). 4.6 Determination of solid insoluble matter in acetone
4.6.1 Reagents and solutions
Acetone: dried over anhydrous sodium sulfate.
4.6.2 Instruments and equipment
Erlenmeyer flask: with ground glass joint, 250mL. Reflux condenser: matched with the Erlenmeyer flask. Sand core crucible; 3#
Oven.
4.6.3 Test steps
(2)
Weigh about 10g of sample (accurate to 0.01g), put it into an Erlenmeyer flask, add 50mL of acetone, and heat to reflux until all soluble matter is dissolved. Filter the solution with a crucible whose mass is constant, and then wash the conical flask and crucible with 60mL acetone several times to ensure that all solids are transferred to the crucible and all solubles on the wall are washed away. Place the crucible in a 110℃ oven and dry for 30 minutes, take it out and cool it to room temperature in a desiccator, and weigh it until the mass is constant.
The content of solid insoluble matter in the two ketones expressed as mass percentage (X3) is calculated according to formula (3): m - mo × 100
Where: mi-
The mass of the sand core crucible and insoluble matter after the mass is constant, name; the mass of the sand core crucible, g
m——the mass of the sample, g.
4.7 Determination of acidity
4.7.1 Reagents and solutions
Acetone.
Standard sodium hydroxide titration solution: c(NaOH) 0.02mol/L, prepared according to the method specified in GB/T601. Mix indicator solution: 2 mL of 2g/L methyl red ethanol solution and 10 mL of 2g/L bromocresol green ethanol solution. 4.7.2 Determination steps
· (3)
Weigh 8g of sample (accurate to 0.0001g) and place it in a 250mL conical flask, add 100mL acetone, shake to dissolve the sample, drop 0.6mL of indicator solution, and titrate with sodium hydroxide standard titration solution until the color changes from yellow to blue-green. Perform a blank determination at the same time.
The acidity (X) of the sample expressed as a mass percentage (in terms of H2SO4) is calculated according to formula (4): c(V/-Vo) × 0. 049 × 100*
(4)
HG36211999
-The actual concentration of the sodium hydride standard solution, mol/, where:
V, the volume of the sodium hydroxide standard solution consumed by the titration of the sample solution, mL, V. The volume of the sodium hydroxide standard solution consumed by the titration of the blank solution, mLm
-The mass of the sample·,
0.049---The mass of sulfuric acid in grams equivalent to 1.00mL of the sodium hydroxide standard solution [c(NaOH)=1.000mol/L]. 4.8 Product inspection and acceptance
The inspection and acceptance of products shall comply with the relevant provisions of GB/T1604 and shall be accepted within three months from the date of arrival. The rounding value comparison method is used for the processing of limit values.
5 Marking, labeling, packaging, purchase and transportation
5.1 The marking, labeling and packaging of Budweiser technical shall comply with the relevant provisions of GB3796. As a commodity circulating technical, it should also have a trademark and production license number.
5.2 The Budweiser technical is packed with a layer of plastic film bag inside, and a commercial propylene woven bag outside, and then the bag is sealed and placed in an iron barrel, with a net content of (100±0.2)kg per barrel.
5.3 According to user requirements or ordering agreements, other forms of packaging can be used, but they must comply with the relevant provisions of GB3796. 5.4 The packages should be stored in a ventilated and dry warehouse. 5.5 During storage and transportation, strictly prevent moisture and sunlight, do not mix with food, seeds, and feed, avoid contact with skin and eyes, and prevent inhalation through the mouth. 5.6 Safety
Carbofuran is a highly toxic carbamate insecticide. It is poisonous if swallowed or inhaled. It can also penetrate through the skin. Therefore, when using this product, you should wear protective clothing and protective gloves. If the skin or exposed parts of the body come into contact with this product, they should be washed with soap and water in time. If poisoning occurs, atropine can be injected intramuscularly to detoxify in mild cases. If necessary, consult a doctor. 12045℃.
Graduated colorimetric tube: 25mL.
Volume flask: 25, 50, 250mL.
Pipette: 1, 2 mL graduated pipette.
4.4.4 Determination steps
Weigh 0.01~0.02g (accurate to 0.0002g) of carbofuran technical, place it in a 25mL graduated colorimetric tube, add 2mL acetone to dissolve it. Accurately add 1.5mL of 0.1mol/L hydrochloric acid solution, shake well, add 2mL of 1.0mol sodium nitrite along the wall of the colorimetric tube, shake accurately for 1min, place it in a 40℃ constant temperature water bath and heat for 20min, take out the colorimetric tube, cool it to room temperature, then use a 1mL pipette to add 0.5mL of 25g/L methylamine aqueous solution, dilute to 10mL with water, and shake well. The solution is placed in a 1cm colorimetric tube and its absorbance is measured at a wavelength of 436nm. At the same time, accurately absorb 1mL of furanol standard solution, place it in a 25mL colorimetric tube, and add 1mL of acetone. The following operations are the same as for the sample. 1202
4.4.5 Calculation
HG 3621—1999
The free phenol (calculated as furanol) content (X,) expressed as mass percentage is calculated according to formula (2). X,
Where: mi-
Mass of furanol in the standard solution, mg;
Mass of the sample solution, mg
A-Absorbance of the standard solution;
A Absorbance of the sample solution.
4.4.6 Allowable difference
The difference between two parallel determinations should not be greater than 0.02%. 4.5 Determination of moisture content
Carry out according to the Karl Fischer potential endpoint method in GB/T1600-1979 (1989). 4.6 Determination of solid insoluble matter in acetone
4.6.1 Reagents and solutions
Acetone: dried over anhydrous sodium sulfate.
4.6.2 Instruments and equipment
Erlenmeyer flask: with ground glass joint, 250mL. Reflux condenser: matched with the Erlenmeyer flask. Sand core crucible; 3#
Oven.
4.6.3 Test steps
(2)
Weigh about 10g of sample (accurate to 0.01g), put it into an Erlenmeyer flask, add 50mL of acetone, and heat to reflux until all soluble matter is dissolved. Filter the solution with a crucible whose mass is constant, and then wash the conical flask and crucible with 60mL acetone several times to ensure that all solids are transferred to the crucible and all solubles on the wall are washed away. Place the crucible in a 110℃ oven and dry for 30min, take it out and cool it to room temperature in a desiccator, and weigh it until the mass is constant.
The content of solid insoluble matter in the two ketones expressed as mass percentage (X3) is calculated according to formula (3): m - mo × 100
Where: mi-
The mass of the sand core crucible and insoluble matter after the mass is constant, name; the mass of the sand core crucible, g
m——the mass of the sample, g.
4.7 Determination of acidity
4.7.1 Reagents and solutions
Acetone.
Standard sodium hydroxide titration solution: c(NaOH) 0.02mol/L, prepared according to the method specified in GB/T601. Mix indicator solution: 2 mL of 2g/L methyl red ethanol solution and 10 mL of 2g/L bromocresol green ethanol solution. 4.7.2 Determination steps
· (3)
Weigh 8g of sample (accurate to 0.0001g) and place it in a 250mL conical flask, add 100mL acetone, shake to dissolve the sample, drop 0.6mL of indicator solution, and titrate with sodium hydroxide standard titration solution until the color changes from yellow to blue-green. Perform a blank determination at the same time.
The acidity (X) of the sample expressed as a mass percentage (in terms of H2SO4) is calculated according to formula (4): c(V/-Vo) × 0. 049 × 100*
（4）
HG36211999
-The actual concentration of the sodium hydride standard solution, mol/, where:
V, the volume of the sodium hydroxide standard solution consumed by the titration of the sample solution, mL, V. The volume of the sodium hydroxide standard solution consumed by the titration of the blank solution, mLm
-The mass of the sample·,
0.049---The mass of sulfuric acid in grams equivalent to 1.00mL of the sodium hydroxide standard solution [c(NaOH)=1.000mol/L]. 4.8 Product Inspection and Acceptance
The inspection and acceptance of products shall comply with the relevant provisions of GB/T1604 and shall be accepted within three months from the date of arrival. The rounding value comparison method is used for the processing of limit values.
5 Marking, labeling, packaging, purchase and transportation
5.1 The marking, labeling and packaging of Budweiser technical shall comply with the relevant provisions of GB3796. As a commodity circulating technical, it should also have a trademark and production license number.
5.2 The Budweiser technical is packed with a layer of plastic film bag inside, and a commercial propylene woven bag outside, and then the bag is sealed and placed in an iron barrel, with a net content of (100±0.2)kg per barrel.
5.3 According to user requirements or ordering agreements, other forms of packaging can be used, but they must comply with the relevant provisions of GB3796. 5.4 The packages should be stored in a ventilated and dry warehouse. 5.5 During storage and transportation, strictly prevent moisture and sunlight, do not mix with food, seeds, and feed, avoid contact with skin and eyes, and prevent inhalation through the mouth. 5.6 Safety
Carbofuran is a highly toxic carbamate insecticide. It is poisonous if swallowed or inhaled. It can also penetrate through the skin. Therefore, when using this product, you should wear protective clothing and protective gloves. If the skin or exposed parts of the body come into contact with this product, they should be washed with soap and water in time. If poisoning occurs, atropine can be injected intramuscularly to detoxify in mild cases. If necessary, consult a doctor. 12042 Determination steps
·（3）
Weigh 8g of sample (accurate to 0.0001g) and place it in a 250mL conical flask, add 100mL acetone, shake to dissolve the sample, add 0.6mL indicator solution, and titrate with sodium hydroxide standard titration solution until the color changes from yellow to blue-green. At the same time, make a blank determination.
The acidity (X) of the sample expressed as mass percentage (in terms of H2SO4) is calculated according to formula (4): c(V/-Vo) × 0. 049 × 100*
（4）
HG36211999
The actual concentration of the sodium hydride standard solution, mol/, where:
V, the volume of the sodium hydroxide standard solution consumed by the titration of the sample solution, mL, V. The volume of sodium hydroxide standard solution consumed by titrating the blank solution, mLm
—the mass of the sample·,
0.049---the mass of sulfuric acid in grams equivalent to 1.00mL sodium hydroxide standard solution [c (NaOH) = 1.000mol/L]. 4.8 Product inspection and acceptance
The inspection and acceptance of products shall comply with the relevant provisions of GB/T1604 and shall be accepted within three months from the date of arrival. The rounding value comparison method shall be used for the treatment of limit values.
5 Marking, labeling, packaging, purchase and transportation
5.1 The marking, labeling and packaging of Budweiser technical shall comply with the relevant provisions of GB3796. As a commodity circulating technical, it shall also have a trademark and production license number.
5.2 The Budweiser technical is packed with a layer of plastic film bag inside and a commercial propylene woven bag outside, and then the bag is sealed and placed in an iron barrel, with a net content of (100±0.2)kg per barrel.
5.3 Other forms of packaging may be used according to user requirements or order agreements, but they must comply with the relevant provisions of GB3796. 5.4 Packages should be stored in ventilated and dry warehouses. 5.5 During storage and transportation, strictly prevent moisture and sunlight, do not mix with food, seeds, and feed, avoid contact with skin and eyes, and prevent inhalation through the mouth. 5.6 Safety
Carbofuran is a highly toxic carbamate insecticide. It is toxic if swallowed or inhaled, and can also penetrate through the skin. Therefore, when using this product, you should wear protective clothing and protective gloves. After the skin or exposed parts of the body come into contact with this product, they should be washed with fertilizer and water in time. If poisoning occurs, atropine can be injected intramuscularly to detoxify in mild cases, and a doctor should be consulted if necessary. 12042 Determination stepsbZxz.net
·（3）
Weigh 8g of sample (accurate to 0.0001g) and place it in a 250mL conical flask, add 100mL acetone, shake to dissolve the sample, add 0.6mL indicator solution, and titrate with sodium hydroxide standard titration solution until the color changes from yellow to blue-green. At the same time, make a blank determination.
The acidity (X) of the sample expressed as mass percentage (in terms of H2SO4) is calculated according to formula (4): c(V/-Vo) × 0. 049 × 100*
（4）
HG36211999
The actual concentration of the sodium hydride standard solution, mol/, where:
V, the volume of the sodium hydroxide standard solution consumed by the titration of the sample solution, mL, V. The volume of sodium hydroxide standard solution consumed by titrating the blank solution, mLm
—the mass of the sample·,
0.049---the mass of sulfuric acid in grams equivalent to 1.00mL sodium hydroxide standard solution [c (NaOH) = 1.000mol/L]. 4.8 Product inspection and acceptance
The inspection and acceptance of products shall comply with the relevant provisions of GB/T1604 and shall be accepted within three months from the date of arrival. The rounding value comparison method shall be used for the treatment of limit values.
5 Marking, labeling, packaging, purchase and transportation
5.1 The marking, labeling and packaging of Budweiser technical shall comply with the relevant provisions of GB3796. As a commodity circulating technical, it shall also have a trademark and production license number.
5.2 The Budweiser technical is packed with a layer of plastic film bag inside and a commercial propylene woven bag outside, and then the bag is sealed and placed in an iron barrel, with a net content of (100±0.2)kg per barrel.
5.3 Other forms of packaging may be used according to user requirements or order agreements, but they must comply with the relevant provisions of GB3796. 5.4 Packages should be stored in ventilated and dry warehouses. 5.5 During storage and transportation, strictly prevent moisture and sunlight, do not mix with food, seeds, and feed, avoid contact with skin and eyes, and prevent inhalation through the mouth. 5.6 Safety
Carbofuran is a highly toxic carbamate insecticide. It is toxic if swallowed or inhaled, and can also penetrate through the skin. Therefore, when using this product, you should wear protective clothing and protective gloves. After the skin or exposed parts of the body come into contact with this product, they should be washed with fertilizer and water in time. If poisoning occurs, atropine can be injected intramuscularly to detoxify in mild cases, and a doctor should be consulted if necessary. 1204
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