Some standard content:
Chemical Industry Standard of the People's Republic of China
HG2212—91
Published on November 18, 1991
Acephate EC
Implemented on July 1, 1992
Ministry of Chemical Industry of the People's Republic of China
WChemical Industry Standard of the People's Republic of China
Acephate EC
Subject Content and Scope of Application
HG2212—91
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and safety measures for the use of 30% acephate EC.
This standard applies to 30% acephate EC prepared from acephate technical, emulsifier and solvent. Active ingredient: Acephate
Chemical name: O,S-dimethyl-N-acetylthiophosphoramideStructural formula:
Molecular formula: CH1oNO;PS
Relative molecular mass: 183.16 (according to the international relative atomic mass in 1987)Cited standards
Preparation of standard solution for titration analysis (volume analysis) of chemical reagentsGB1600
GB1603
GB1604
GB4838
GB6698
3 Technical requirements
Method for determination of moisture content in pesticides
Method for determination of stability of pesticide emulsions
Pesticide acceptance rules
Emulsifiable concentrate pesticide packaging
Method for analysis of the content of acephate technical
3.1 Appearance: Light yellow transparent liquid.
3.230% acephate emulsifiable concentrate shall meet the requirements of the following table. Item
Acephate content, %(m/m)
Water, %(m/m)
Acidity (in H,SO), %(m/m)
Emulsion stability (diluted 200 times)
Low temperature stability1
Hot storage stability)
Note: 1) is a type inspection item.
Approved by the Ministry of Chemical Industry of the People's Republic of China on November 18, 1991>
Implemented on July 1, 1992
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4.1 Determination of acephate content
Determination shall be carried out in accordance with the provisions of GB6698.
4.2 Determination of moisture
HG2212—91wwW.bzxz.Net
Determine according to the Karl Fischer method in GB1600. 4.3 Determination of acidity
4.3.1 Reagents and solutions
4.3.1.1 Anhydrous ethanol (GB678): analytical grade. 4.3.1.2 Standard titration solution of sodium hydroxide (GB629): c(NaOH)=0.05mol/L, prepared and calibrated in accordance with GB601. 4.3.1.3 Methyl red indicator solution: 2g/L ethanol solution. 4.3.2 Determination steps
Accurately weigh 1-2 g of the sample (weighed to 0.0002 g) into a 100 mL conical flask, add 25 mL of anhydrous ethanol (4.3.1.1), add 3 drops of methyl red indicator solution (4.3.1.3), and titrate with sodium hydroxide standard titration solution (4.3.1.2) until the solution changes from red to yellow, which is the end point. At the same time, perform a blank test.
4.3.3 Calculation of results
The percentage of acidity (in HSO,) (X) is calculated as follows: (V-V2)·cX0.049
Wherein: V—volume of sodium hydroxide standard titration solution consumed by a sample, mL, V2——volume of sodium hydroxide standard titration solution consumed by a blank test, mL; c—concentration of sodium hydroxide standard titration solution, mol/Lm
mass of the sample, g,
0.049——mass of sulfuric acid equivalent to 1.00mL sodium hydroxide standard titration solution [c(Na0H)=1.000mol/LJ, expressed in grams.
4.4 Determination of emulsion stability
Carry out in accordance with GB1603.
4.5 Determination of low temperature stability
4.5.1 Instrument
Ice water bath or refrigerator: control the temperature to 0±1℃. 4.5.2 Determination steps
Weigh 50g of sample into a 100mL beaker, place the beaker in an ice bath (or refrigerator), maintain the temperature at 0±1℃, and hold for 1h. During this period, stir with a glass spoon every 15min, and stir for 30s each time. Observe whether there is solid or oily matter precipitated in the cup. If there is no solid or oily matter precipitated, the low-temperature stability of the sample is qualified.
4.6 Determination of thermal storage stability
4.6.1 Instrument
Oven: temperature control accuracy is 54±2℃; bottle: capacity is 50mL, neck length is about 5cm. 4.6.2 Determination
Use a medical syringe to draw 30mL of sample and inject it into a clean bottle. Do not let the sample touch the neck of the bottle. Put the bottle in an ice salt bath, heat and seal it, and then weigh it (Note: Avoid solvent evaporation when sealing), and seal at least two bottles. Place the sealed anyan in a metal container, and then place it in an oven at 54 ± 2°C and store it for 7 days. After taking the anyan out of the oven, cool it, weigh it and test it for leaks. For leak-free samples, test them within 24 hours according to the methods specified in 4.14.3 and 4.4 of this standard. If the test results show that the content of acephate is ≥25%, the acidity is <0.5%, and the emulsion stability is diluted 2
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200 times, the hot storage stability test of the sample is qualified. If one of the above requirements is not met, it is unqualified. 5 Inspection rules
5.1 Carry out according to the provisions of GB1604.
5.2 Low temperature stability and hot storage stability are type inspection items, and the inspection cycle is half a year. 6 Marking, packaging, transportation, purchase and storage
6.1 Marking
Each package should be marked according to the relevant provisions of GB4838. 6.2 Packaging
Acephate emulsifiable concentrate should be packaged in clean, dry brown glass bottles or polyethylene bottles, which must be plugged with inner plugs and covered with outer caps to prevent leakage. The net weight of each bottle is 0.5kg or 1.0kg. The glass bottles are covered with straw, and straw mats or corrugated paper are used as padding. They are tightly arranged in the outer packaging box. The net weight of each box shall not exceed 12kg. The box should be accompanied by a product manual and a certificate of conformity, including: manufacturer name, product name, batch number, production date, net weight and a certificate that the product quality complies with this standard.
6.3 Transportation
When shipping this product, it should be handled with care in accordance with the requirements for drug loading and unloading, and must not be thrown or dropped. When the packages are stored in the cargo yard or dock, they must be covered with bitter cloth.
6.4 Storage
When storing this product, it should be strictly protected from moisture and sunlight, and maintained with good ventilation. It should not be mixed or co-packed with food, seeds, and feed, and should avoid contact with skin and eyes, and prevent inhalation through the mouth and nose.
Within one year, the percentage of acephate in this product should not be less than 27%. 7 Safety Measures for Use
7.1 The concentration and dosage of the pesticide should be strictly in accordance with the instructions for use. 7.2 When the skin comes into contact with this product or the product is sprayed, the exposed parts of the body and the liquid should be washed with soap after contact. Additional Notes:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the technical jurisdiction of the Shenyang Institute of Chemical Industry. This standard was drafted by the Zhejiang Institute of Chemical Industry. Jiaxing Pesticide Factory, Huangyan Pesticide Factory, Shanghai Pesticide Factory, Guangdong Huaxian Pesticide Factory, Jiangmen Pesticide Factory, Jiangxi Zixi Pesticide Factory participated in the drafting. The main drafters of this standard are Fang Jufen, Huang Lianjie, Xu Qianghua, Ruan Guibing, Wen Lili, Wang Yucheng, Ji Guang and Fu Chengwen. 3
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