Some standard content:
HG 3629-1999
The product quality control items and analytical methods for active ingredient content determined in this standard are formulated with reference to the pesticide specifications of the Food and Agriculture Organization of the United Nations (FAO) and the liquid chromatography analytical method of cypermethrin of the Council for International Pesticide Analysis Cooperation (CIPAC), and in combination with the actual situation of domestic production.
This standard is proposed by the Policy and Regulations Department of the State Administration of Petroleum and Chemical Industry. This standard is under the jurisdiction of Shenyang Chemical Industry Research Institute. The main drafting unit of this standard: Shenyang Chemical Industry Research Institute. The participating drafting units of this standard: Zhongshan Kaida Fine Chemical Co., Ltd. and Tianjin Pesticide Co., Ltd. The main drafters of this standard: Jiang Minyi, Ma Yaguang, Xing Jun, Wu Zhijian.
Chemical Industry Standard of the People's Republic of China
High-efficiency cypermethrin technical
Beta-cypermethrin technical
Other names, structural formulas and basic physical and chemical parameters of high-efficiency cypermethrin are as follows: ISO common name: Beta-cypermethrinCIPAC digital code: 332
HG 3629—1999
Chemical name: (S)-α-cyano-3-phenoxybenzyl (1R, 3R)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate and (R)-α-cyano-3-phenoxybenzyl (1S, 3S)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate and (S)-α-cyano-3-phenoxybenzyl (1R, 3S)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate and (R)-α-cyano-3-phenoxybenzyl (1S ,3R)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate Structural formula:
(S)(1R,3R)-isomer
(R)(1S,3S)-isomer
(S)(1R,3S)-isomer
(R)(1S,3R)-isomer
National Petroleum and Chemical Industry Bureau 1999-06-16 Approved 1258
2000-06-01 Implementation
Empirical formula: C22H1.Cl2NO3
HG 3629--1999
Relative molecular weight: 416.31 (according to the 1993 international relative atomic mass) Biological activity: insecticidal
Melting point: 63~65℃
Solubility (g/L, 20℃): 1×10-5 in water; 9 in hexane, 370 in xylene; easily soluble in acid, ketone and aromatic hydrocarbons Stability: diastereomerization occurs under alkaline conditions, and hydrolysis occurs in strong alkaline media. Stable under weak acid and neutral conditions, stable to air and sunlight, and good thermal stability
1 Scope
This standard specifies the requirements, test methods, and marking, labeling, packaging, storage and transportation of highly effective flucythrinate technical. This standard applies to highly effective cypermethrin technical composed of highly effective cypermethrin and 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 are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1601—1993 Method for determination of pH value of pesticides GB/T1604--1995 Acceptance rules for commercial pesticides GB/T1605-1979 (1989) Sampling method for commercial pesticides GB3796—1983 General rules for pesticide packaging
3 Requirements
3.1 Appearance: White to light yellow crystalline powder. 3.2 High-efficiency cypermethrin technical shall meet the requirements of Table 1. Table 1 Control Items of High-efficiency Cypermethrin Technical Material Index Item
High-efficiency Cypermethrin Content, %
Loss on Drying, %
4 Test Method
4.1 Sampling
Superior Quality
First-class Quality
Qualified Quality
According to the "Raw Powder Sampling" method in GB/T1605-1979 (1989). The sampling packages are determined by the random number table method, and the final sampling volume should be not less than 100g.
4.2 Identification Test
4.2.1 High Performance Liquid Chromatography: This identification test can be carried out simultaneously with the determination of high-efficiency Cypermethrin content. Under the same chromatographic operating conditions, the relative difference between the retention time of two chromatographic peaks in the sample solution and the retention time of the high-cis-isomer and high-trans-isomer chromatographic peaks of high-efficiency Cypermethrin in the sample solution should be within 1.5%. 4.2.2 Infrared spectroscopy: There should be no significant difference between the infrared spectra of the sample and the standard sample in the wave number range of 4000-400 cm-1 (see Figure 1).
4.3 Determination of the content of highly effective cypermethrin
4.3.1 High performance liquid chromatography external standard method
4.3.1.1 Method summary
HG 3629--1999
Figure 1 Infrared spectrum of highly effective cypermethrin standard sample The sample was dissolved in n-hexane, and a mixed solvent of n-hexane/anhydrous ether was used as the mobile phase. A stainless steel column with silica gel as the filler and an ultraviolet detector (230 nm) were used to separate and determine the highly effective flucythrrin in the sample by normal phase high performance liquid spectroscopy. 4.3.1.2 Reagents and solutions
N-hexane: Chromatographic grade.
Anhydrous ether.
Mobile phase: n-hexane + anhydrous ether = 98 + 2 (volume ratio), the mobile phase is filtered through a filter membrane and degassed in an ultrasonic bath for 20 minutes. High-efficiency chlorpyrifos standard: known content, greater than or equal to 99.0%. 4.3.1.3 Instruments and equipment
High-performance liquid chromatograph: with variable wavelength UV detector. Chromatographic column: 150mm×3.9mm (id) stainless steel column, filled with Nova-Pak SiO, 5μm filler. Chromatographic data processor.
Quantitative injection tube: 5μL.
Ultrasonic cleaner.
Filter: The pore size of the filter membrane is about 0.5μm. 4.3.1.4 High-performance liquid chromatography operating conditions
Mobile phase: n-hexane + anhydrous ether = 98 + 2 (volume ratio) Flow rate: 1.0mL/min.
Column temperature: room temperature.
Detection wavelength: 230nm.
Injection volume: 5μL.
Retention time (min):
Low-efficiency cis [(R)-α, (1R)-cis + (S)-α, (1S)-cis about 5.2, high-efficiency cis [(S)-α, (1R)-cis + (R)-α, (1S)-cis] about 5.9; low-efficiency trans [(R)-α, (1R)-trans + (S)-α, (1S)-trans] about 6.7, high-efficiency trans [(S)-α, (1R)-trans + (R)-α, (1S)-trans] about 7.5. The above operating parameters are typical. According to the characteristics of different instruments, the given operating parameters can be appropriately adjusted to obtain the best effect (see Figure 2).
4.3.1.5 Determination steps
a) Preparation of standard solution
HG36291999
1 Low-efficiency Gu form; 2—High-efficiency frequency form, 3—Low-efficiency trans form;—High-efficiency trans form Figure 2 High-efficiency chloranthrin HPLC chromatogram (external standard method) Weigh 0.05g (accurate to 0.0002g) of high-efficiency chloranthrin standard sample, place it in a 50mL volumetric bottle, dissolve it with n-hexane and dilute it to the scale, and shake it.
b) Preparation of sample solution
Weigh 0.05g (accurate to 0.0002g) of sample containing high-efficiency chloranthrin, place it in a 50mL volumetric flask, dissolve it with n-hexane and dilute it to the scale, and shake it well.
c) Determination
Under the above operating conditions, after the instrument baseline is stable, inject several injections of standard solution continuously until the relative change of the peak area of cypermethrin (high-efficiency cis + high-efficiency trans) between two adjacent injections is less than 15%, and then measure in the order of standard solution, sample solution, sample solution, and standard solution.
4.3.1.6 Calculation
Average the peak areas of high-efficiency flucythrin (high-efficiency cis + high-efficiency trans) in the two injections of sample solution and the peak areas of high-efficiency flucythrin (high-efficiency cis + high-efficiency trans) in the two injections of standard solution before and after the sample. The content of highly effective cypermethrin (X) expressed as a mass percentage is calculated according to formula (1): , =
Where: A1—the average value of the peak area of highly effective cypermethrin (highly effective cis + highly effective trans) in the standard solution: Az—the average value of the peak area of highly effective cypermethrin (highly effective cis + highly effective trans) in the sample solution: m—the mass of the highly effective cypermethrin standard sample, g?
—the mass of the sample, name,
P—the mass percentage of highly effective cypermethrin in the standard sample, %. 4.3.1.7 Allowable difference
Take the arithmetic mean as the determination result. The difference between the results of two parallel determinations shall not exceed 1.2%. · (1)
4.3.2 High performance liquid chromatography internal standard method (arbitration method) 4.3.2.1 Method summary
HG 3629—1999
The sample is dissolved in ethyl acetate/n-hexane mixed solvent containing methyl benzoate (internal standard), and the ethyl acetate/n-hexane mixed solvent is used as the mobile phase. The normal phase high performance liquid chromatography separation and determination are carried out on a chromatographic column filled with Hypersil SiO2, 5μm. 4.3.2.2 Reagents and solutions
Highly effective cypermethrin standard: known content, greater than or equal to 99.0%. Internal standard: methyl benzoate, which shall not contain impurities that interfere with the analysis. N-hexane: chromatographic grade.
Ethyl acetate: chromatographic grade.
Mobile phase: n-hexane + ethyl acetate = 99 + 1 (volume ratio), filtered through a 0.45μm filter membrane, ultrasonic for 15min. Internal standard solution: weigh 3.8g of methyl benzoate in a 1L volumetric flask, dissolve it with the mobile phase and shake it to volume. 4.3.2.3 Instruments and equipment
High performance liquid chromatograph: with variable wavelength detector. Chromatographic column: 200mmX4.6mm (id) stainless steel column, filled with HypersilSiO25μm filler. Chromatographic data processor.
Filter: The pore size of the filter membrane is about 0.45μm.
Quantitative injection tube: 5μL.
4.3.2.4 Liquid chromatography operating conditions
Mobile phase: n-hexane + ethyl acetate = 99 → 1 (volume ratio). Flow rate: 1.0 mL/min.
Detection wavelength: 278nm.
Column temperature: room temperature (temperature change should not exceed 2°C). Injection volume: 5μL.
Retention time (min):
Methyl benzoate (internal standard) about 4.5;
Low efficiency cis [(R)-α, (1R)-cis + (S)-α, (1S)-cis] about 7.8; high efficiency cis [(S)-α, (1R)-cis + (R)-α, (1S)-cis about 9.2; low efficiency trans [(R)-α, (1R)-trans + (S)-α, (1S)-trans about 10.3; high efficiency trans [(S)-α, (1R)-trans + (R)-α, (1S)-trans I about 11.3. The above operating conditions can be adjusted appropriately according to different instruments to obtain the best effect (see Figure 3). 2
4.3.2.5 Determination steps
a) Preparation of standard solution
Internal standard; 2—low-efficiency cis; 3—high-efficiency; 4—low-efficiency trans; 5—high-efficiency transFigure 3 High-efficiency cypermethrin HPLC chromatogram (internal standard method) Weigh 0.05 g (accurate to 0.0002 g) of high-efficiency cypermethrin standard sample into a 15 mL stoppered glass bottle, add 10 mL of internal standard solution with a pipette, dissolve and shake well.
b) Preparation of sample solution
HG 3629—1999
Weigh 0.05 g (accurate to 0.0002 g) of sample containing high-efficiency cypermethrin into a 15 mL stoppered glass bottle, add 10 mL of internal standard solution with the same pipette as in a), dissolve and shake well. c) Determination
Under the above operating conditions, after the instrument baseline is stable, inject several injections of standard solution continuously until the relative change of the peak area ratio of the two adjacent injections of high-efficiency cypermethrin (high-efficiency cis + high-efficiency trans) and the peak area ratio of the internal standard is less than 1.5%, and then perform determination in the order of standard solution, sample solution, sample solution, and standard solution. 4.3.2.6 Calculation
Average the peak area ratio of the two injections of the sample solution of high-efficiency cypermethrin (high-efficiency cis + high-efficiency trans) and the peak area ratio of the internal standard, and the peak area ratio of the two injections of the standard solution before and after the sample of high-efficiency cypermethrin (high-efficiency cis + high-efficiency trans) and the peak area ratio of the internal standard. The content of highly effective cypermethrin expressed as mass percentage (X1) is calculated according to formula (2): X1 = r2m,P
Wherein: r1-the average value of the peak area ratio of highly effective cypermethrin (high-efficiency cis + high-efficiency trans) in the standard solution and the peak area ratio of the internal standard; r2-the average value of the peak area ratio of the high-efficiency cypermethrin (high-efficiency cis + high-efficiency trans) in the sample solution and the peak area ratio of the internal standard; ml-the mass of the highly effective cypermethrin standard, g;
m2-the mass of the sample, g;
P-the mass percentage of highly effective cypermethrin in the standard sample, %. 4.3.2.7 Allowable difference
Take its arithmetic mean as the determination result. The difference between two parallel determination results should not exceed 1.2%. 4.4 Determination of drying loss
4.4.1 Instruments and equipment
Oven: accuracy ±2℃.
Weighing bottle: inner diameter 70mm, height 40mm.
Dryer.
4.4.2 Determination steps
Put the weighing bottle in a 105℃ oven for 1h, take it out and put it in a dryer to cool to room temperature, weigh it (accurate to 0.0002g). Repeat the above steps until the mass of the weighing bottle is constant. Put 10g of sample in the bottle, flatten it, and weigh it (accurate to 0.0002g). Put the weighing bottle in a 50℃ oven without covering it, and after drying for 3h, cover it, take it out and put it in a dryer to cool to room temperature, and weigh it. 4.4.3 Calculation
The drying loss (X:) of the sample expressed as a mass percentage shall be calculated according to formula (3): Xg= m2=m × 100
The mass of the sample and the weighing bottle before drying, g; where: mz
m The mass of the sample and the weighing bottle after drying, g, m—The mass of the sample, g.
4.4.4 Allowable difference
Take the arithmetic mean as the measurement result. The relative difference between the results of two parallel measurements shall not exceed 30%. 4.5 Determination of pH value
Perform according to GB/T1601.
4.6 Inspection and acceptance of products
The inspection and acceptance of products shall comply with the provisions of GB/T1604. The rounding value comparison method shall be used for the processing of limit values. (3)
5 Marking, labeling, packaging, storage and transportation
HG3629-1999
5.1 The marking, labeling and packaging of highly effective cypermethrin technical shall comply with the provisions of GB3796 and shall have the production license number and trademark. 5.2 Highly effective cypermethrin technical shall be packaged in woven bags lined with plastic bags or iron drums lined with plastic bags, with a net content of 25kg per bag and a net content of no more than 100kg per drum.
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 Highly effective flucythrinate technical packaging shall 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 and nose. 5.6 Safety: This product is a toxic substance that can penetrate through the skin. Protective gloves and gas masks should be worn when using it. After application, it should be washed with soap and water immediately. If poisoning occurs, go to the hospital for examination and treatment in time. 5.7 Warranty period: Under the specified storage and transportation conditions, the warranty period of highly effective chlorpyrifos technical is 2 years from the date of production. 12640 mL/min.
Detection wavelength: 278nm.
Column temperature: room temperature (temperature change should not exceed 2℃). Injection volume: 5μL.
Retention time (min):
Methyl benzoate (internal standard) about 4.5;
Low efficiency cis [(R)-α, (1R)-cis + (S)-α, (1S)-cis} about 7.8; high efficiency cis [(S)-α, (1R)-cis + (R)-α, (1S)-cis about 9.2; low efficiency trans [(R)-α, (1R)-trans + (S)-α, (1S)-trans about 10.3; high efficiency trans [(S)-α, (1R)-trans + (R)-α, (1S)-trans I about 11.3. The above operating conditions can be adjusted appropriately according to different instruments to obtain the best effect (see Figure 3). 2
4.3.2.5 Determination steps
a) Preparation of standard solution
Internal standard; 2—low efficiency cis; 3—high efficiency; 4—low efficiency trans; 5—high efficiency trans Figure 3 High efficiency chlorpyrifos HPLC chromatogram (internal standard method) Weigh 0.05g (accurate to 0.0002g) of high efficiency chlorpyrifos standard sample into a 15mL stoppered glass bottle, add 10mL of internal standard solution with a pipette, and dissolve and shake well.
b) Preparation of sample solution
HG 3629—1999
Weigh 0.05 g (accurate to 0.0002 g) of sample containing highly effective cypermethrin, put it into a 15 mL stoppered glass bottle, add 10 mL of internal standard solution using the same pipette as in a), dissolve and shake well. c) Determination
Under the above operating conditions, after the instrument baseline is stable, continuously inject several needles of standard solution until the relative change of the peak area ratio of highly effective cypermethrin (high-efficiency cis + high-efficiency trans) and the peak area ratio of the internal standard in two adjacent needles is less than 1.5%, and then determine in the order of standard solution, sample solution, sample solution, and standard solution. 4.3.2.6 Calculation
Average the peak area ratio of the measured high-efficiency flucythrinate (high-efficiency cis + high-efficiency trans) to the peak area ratio of the internal standard in the two sample solutions and the peak area ratio of the high-efficiency cypermethrin (high-efficiency cis + high-efficiency trans) to the peak area ratio of the internal standard in the two standard solutions before and after the sample. The high-efficiency cypermethrin content (X,) expressed as mass percentage is calculated according to formula (2): X, = r2m,P
Wherein: r1-the average value of the peak area ratio of the high-efficiency cypermethrin (high-efficiency cis + high-efficiency trans) to the peak area ratio of the internal standard in the standard solution; r2-the average value of the peak area ratio of the high-efficiency cypermethrin (high-efficiency cis + high-efficiency trans) to the peak area ratio of the internal standard in the sample solution; ml-the mass of the high-efficiency cypermethrin standard, g;
m2-the mass of the sample, g;
P-the mass percentage of the high-efficiency cypermethrin in the standard sample, %. 4.3.2.7 Allowable difference
Take the arithmetic mean as the determination result. The difference between two parallel determination results shall not exceed 1.2%. 4.4 Determination of drying loss
4.4.1 Instruments and equipment
Oven: accuracy ±2℃.
Weighing bottle: inner diameter 70mm, height 40mm.
Dryer.
4.4.2 Determination steps
Put the weighing bottle in a 105℃ oven for 1h, take it out and put it in a dryer to cool to room temperature, weigh it (accurate to 0.0002g). Repeat the above steps until the mass of the weighing bottle is constant. Place 10g of sample in the bottle, flatten it, and weigh it (accurate to 0.0002g). Put the weighing bottle in a 50℃ oven without covering it, and after drying for 3h, cover it, take it out and put it in a dryer to cool to room temperature, and weigh it. 4.4.3 Calculation
The drying loss (X:) of the sample expressed as a mass percentage shall be calculated according to formula (3): Xg= m2=m × 100
The mass of the sample and the weighing bottle before drying, g; where: mz
m The mass of the sample and the weighing bottle after drying, g, m—The mass of the sample, g.
4.4.4 Allowable difference
Take the arithmetic mean as the measurement result. The relative difference between the results of two parallel measurements shall not exceed 30%. 4.5 Determination of pH value
Perform according to GB/T1601.
4.6 Inspection and acceptance of products
The inspection and acceptance of products shall comply with the provisions of GB/T1604. The rounding value comparison method shall be used for the processing of limit values. (3)
5 Marking, labeling, packaging, storage and transportation
HG3629-1999
5.1 The marking, labeling and packaging of highly effective cypermethrin technical shall comply with the provisions of GB3796 and shall have the production license number and trademark. 5.2 Highly effective cypermethrin technical shall be packaged in woven bags lined with plastic bags or iron drums lined with plastic bags, with a net content of 25kg per bag and a net content of no more than 100kg per drum.
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 Highly effective flucythrinate technical packaging shall 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 and nose. 5.6 Safety: This product is a toxic substance that can penetrate through the skin. Protective gloves and gas masks should be worn when using it. After application, it should be washed with soap and water immediately. If poisoning occurs, go to the hospital for examination and treatment in time. 5.7 Warranty period: Under the specified storage and transportation conditions, the warranty period of highly effective chlorpyrifos technical is 2 years from the date of production. 12640 mL/min.
Detection wavelength: 278nm.
Column temperature: room temperature (temperature change should not exceed 2℃). Injection volume: 5μL.
Retention time (min):
Methyl benzoate (internal standard) about 4.5;
Low efficiency cis [(R)-α, (1R)-cis + (S)-α, (1S)-cis] about 7.8; high efficiency cis [(S)-α, (1R)-cis + (R)-α, (1S)-cis about 9.2; low efficiency trans [(R)-α, (1R)-trans + (S)-α, (1S)-trans about 10.3; high efficiency trans [(S)-α, (1R)-trans + (R)-α, (1S)-trans] about 11.3. The above operating conditions can be adjusted appropriately according to different instruments to obtain the best effect (see Figure 3). 2
4.3.2.5 Determination steps
a) Preparation of standard solution
Internal standard; 2—low efficiency cis; 3—high efficiency; 4—low efficiency trans; 5—high efficiency trans Figure 3 High efficiency chlorpyrifos HPLC chromatogram (internal standard method) Weigh 0.05g (accurate to 0.0002g) of high efficiency chlorpyrifos standard sample into a 15mL stoppered glass bottle, add 10mL of internal standard solution with a pipette, and dissolve and shake well.
b) Preparation of sample solution
HG 3629—1999
Weigh 0.05 g (accurate to 0.0002 g) of sample containing highly effective cypermethrin, put it into a 15 mL stoppered glass bottle, add 10 mL of internal standard solution using the same pipette as in a), dissolve and shake well. c) Determination
Under the above operating conditions, after the instrument baseline is stable, continuously inject several needles of standard solution until the relative change of the peak area ratio of highly effective cypermethrin (high-efficiency cis + high-efficiency trans) and the peak area ratio of the internal standard in two adjacent needles is less than 1.5%, and then determine in the order of standard solution, sample solution, sample solution, and standard solution. 4.3.2.6 Calculation
Average the peak area ratio of the measured high-efficiency flucythrinate (high-efficiency cis + high-efficiency trans) to the peak area ratio of the internal standard in the two sample solutions and the peak area ratio of the high-efficiency cypermethrin (high-efficiency cis + high-efficiency trans) to the peak area ratio of the internal standard in the two standard solutions before and after the sample. The high-efficiency cypermethrin content (X,) expressed as mass percentage is calculated according to formula (2): X, = r2m,P
Wherein: r1-the average value of the peak area ratio of the high-efficiency cypermethrin (high-efficiency cis + high-efficiency trans) to the peak area ratio of the internal standard in the standard solution; r2-the average value of the peak area ratio of the high-efficiency cypermethrin (high-efficiency cis + high-efficiency trans) to the peak area ratio of the internal standard in the sample solution; ml-the mass of the high-efficiency cypermethrin standard, g;
m2-the mass of the sample, g;
P-the mass percentage of the high-efficiency cypermethrin in the standard sample, %. 4.3.2.7 Allowable difference
Take the arithmetic mean as the determination result. The difference between two parallel determination results shall not exceed 1.2%. 4.4 Determination of drying loss
4.4.1 Instruments and equipment
Oven: accuracy ±2℃.
Weighing bottle: inner diameter 70mm, height 40mm.
Dryer.
4.4.2 Determination steps
Put the weighing bottle in a 105℃ oven for 1h, take it out and put it in a dryer to cool to room temperature, weigh it (accurate to 0.0002g). Repeat the above steps until the mass of the weighing bottle is constant. Place 10g of sample in the bottle, flatten it, and weigh it (accurate to 0.0002g). Put the weighing bottle in a 50℃ oven without covering it, and after drying for 3h, cover it, take it out and put it in a dryer to cool to room temperature, and weigh it. 4.4.3 Calculation
The drying loss (X:) of the sample expressed as a mass percentage shall be calculated according to formula (3): Xg= m2=m × 100
The mass of the sample and the weighing bottle before drying, g; where: mz
m The mass of the sample and the weighing bottle after drying, g, m—The mass of the sample, g.
4.4.4 Allowable difference
Take the arithmetic mean as the measurement result. The relative difference between the results of two parallel measurements shall not exceed 30%. 4.5 Determination of pH value
Perform according to GB/T1601.
4.6 Inspection and acceptance of productsbzxZ.net
The inspection and acceptance of products shall comply with the provisions of GB/T1604. The rounding value comparison method shall be used for the processing of limit values. (3)
5 Marking, labeling, packaging, storage and transportation
HG3629-1999
5.1 The marking, labeling and packaging of highly effective cypermethrin technical shall comply with the provisions of GB3796 and shall have the production license number and trademark. 5.2 Highly effective cypermethrin technical shall be packaged in woven bags lined with plastic bags or iron drums lined with plastic bags, with a net content of 25kg per bag and a net content of no more than 100kg per drum.
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 Highly effective flucythrinate technical packaging shall 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 and nose. 5.6 Safety: This product is a toxic substance that can penetrate through the skin. Protective gloves and gas masks should be worn when using it. After application, it should be washed with soap and water immediately. If poisoning occurs, go to the hospital for examination and treatment in time. 5.7 Warranty period: Under the specified storage and transportation conditions, the warranty period of highly effective chlorpyrifos technical is 2 years from the date of production. 12640002g). Repeat the above steps until the mass of the weighing bottle is constant. Place 10g of sample in the bottle, flatten it, and weigh it (accurate to 0.0002g). Place the weighing bottle in a 50℃ oven without a cover. After drying for 3h, cover it, take it out and put it in a desiccator to cool to room temperature, and weigh it. 4.4.3 Calculation
The drying loss (X:) of the sample expressed as mass percentage is calculated according to formula (3): Xg= m2=m × 100
The mass of the sample and the weighing bottle before drying, g; where: mz
m The mass of the sample and the weighing bottle after drying, g, m—the mass of the sample, g.
4.4.4 Allowable difference
Take its arithmetic mean as the measurement result. The relative difference between two parallel measurement results should not exceed 30%. 4.5 Determination of pH value
Carry out according to GB/T1601.
4.6 Inspection and acceptance of products
Inspection and acceptance of products shall comply with the provisions of GB/T1604. The rounded value comparison method shall be used for the processing of limit values. (3)
5 Marking, labeling, packaging, storage and transportation
HG3629-1999
5.1 The marking, labeling and packaging of highly effective cypermethrin technical shall comply with the provisions of GB3796 and shall have the production license number and trademark. 5.2 Highly effective cypermethrin technical shall be packaged in woven bags lined with plastic bags or iron drums lined with plastic bags, with a net content of 25kg per bag and a net content of no more than 100kg per drum.
5.3 Other forms of packaging may be used according to user requirements or ordering agreements, but they shall comply with the relevant provisions of GB3796. 5.4 Highly effective flucythrinate technical packaging shall 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, feed, avoid contact with skin and eyes, and prevent inhalation through the mouth and nose. 5.6 Safety: This product is a toxic substance that can penetrate through the skin. When using it, you should wear protective gloves and a gas mask. After applying the medicine, you should immediately wash it with soap and water. If poisoning occurs, you should go to the hospital for examination and treatment in time. 5.7 Warranty period: Under the specified storage and transportation conditions, the warranty period of highly effective chlorpyrifos technical is 2 years from the date of production. 12640002g). Repeat the above steps until the mass of the weighing bottle is constant. Place 10g of sample in the bottle, flatten it, and weigh it (accurate to 0.0002g). Place the weighing bottle in a 50℃ oven without a cover. After drying for 3h, cover it, take it out and put it in a desiccator to cool to room temperature, and weigh it. 4.4.3 Calculation
The drying loss (X:) of the sample expressed as mass percentage is calculated according to formula (3): Xg= m2=m × 100
The mass of the sample and the weighing bottle before drying, g; where: mz
m The mass of the sample and the weighing bottle after drying, g, m—the mass of the sample, g.
4.4.4 Allowable difference
Take its arithmetic mean as the measurement result. The relative difference between two parallel measurement results should not exceed 30%. 4.5 Determination of pH value
Carry out according to GB/T1601.
4.6 Inspection and acceptance of products
Inspection and acceptance of products shall comply with the provisions of GB/T1604. The rounded value comparison method shall be used for the processing of limit values. (3)
5 Marking, labeling, packaging, storage and transportation
HG3629-1999
5.1 The marking, labeling and packaging of highly effective cypermethrin technical shall comply with the provisions of GB3796 and shall have the production license number and trademark. 5.2 Highly effective cypermethrin technical shall be packaged in woven bags lined with plastic bags or iron drums lined with plastic bags, with a net content of 25kg per bag and a net content of no more than 100kg per drum.
5.3 Other forms of packaging may be used according to user requirements or ordering agreements, but they shall comply with the relevant provisions of GB3796. 5.4 Highly effective flucythrinate technical packaging shall 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, feed, avoid contact with skin and eyes, and prevent inhalation through the mouth and nose. 5.6 Safety: This product is a toxic substance that can penetrate through the skin. When using it, you should wear protective gloves and a gas mask. After applying the medicine, you should immediately wash it with soap and water. If poisoning occurs, you should go to the hospital for examination and treatment in time. 5.7 Warranty period: Under the specified storage and transportation conditions, the warranty period of highly effective chlorpyrifos technical is 2 years from the date of production. 1264
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