HG 2318-1992 Sodium disulfone (dioxon) wet powder HG2318-1992 standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG2318-92
Sodium disulfonate (dioxon) wet powder
Published on June 1, 1992
Ministry of Chemical Industry of the People's Republic of China
Implemented on January 1, 1993
Chemical Industry Standard of the People's Republic of China
Sodium disulfonate (dioxon) wet powder
Subject content and scope of application
HG2318-92
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of sodium disulfonate (dioxon) wet powder. This standard applies to sodium disulfonate (dioxon) wet powder processed from sodium disulfonate (dioxon) technical material and fillers. Active ingredient: Sodium disulfone (dimethoxone)
Chemical name: Sodium p-dimethylaminobenzene diazonium sulfonate Structural formula:
Molecular formula: C.H1oN.SO:Na
N-NSO,NabZxz.net
Relative molecular mass: 251.23 (according to the international relative atomic mass in 1989) Reference standards
GB1600
GB1601
GB1604
GB1605
GB3796
Method for determination of moisture content in pesticides
Method for determination of hydrogen ion concentration in pesticides
Pesticide acceptance rules
Sampling method for commercial pesticides
General rules for pesticide packaging
HG2-896 Method for determination of fineness of pesticide powder 3 Technology Requirements
3.1 Appearance: brown powder
3.2 Sodium disulfonate (dioxon) wet powder shall meet the following index requirements: Item
Sodium disulfonate (dioxon) content, % (m/m) Moisture, % (m/m)
Fineness, (through 75um sieve), % (m/m) 4 Inspection method
4.1 Determination of sodium disulfonate (dioxon) content
4.1.1 Summary of method
Approved by the Ministry of Chemical Industry of the People's Republic of China on 1992-06-01>
Implementation on 1993-01-01
HG2318-92
After the sodium disulfonate (dioxon) sample is separated and extracted by silica gel plate, the absorbance of sodium disulfonate (dioxon) in sodium sulfite solution is determined at a wavelength of 435nm.
4.1.2 Reagents and instruments
Sodium disulfide (dioxon) standard sample: known content; Sodium sulfite (HG3-1078) solution: analytical grade, 25.2g/L; Dimethylformamide: analytical grade;
Chloroform (GB682): analytical grade;
Methanol (GB683): ​​analytical grade;
Ammonium hydroxide (GB631): analytical grade;
Silica gel G: for thin layer chromatography;
Visible spectrophotometer;
Sand core funnel G4 (or Buchner funnel);
Chromatography cylinder.
4.1.3 Preparation of silica gel plate
Weigh 12g silica gel G, stir with 26-28mL distilled water to make a paste, evenly spread on a 10cm×20cm glass plate that has been cleaned and wiped with anhydrous ethanol, dry it in an oven, activate it at 120℃ for 1h, and cool it in a desiccator for later use. 4.1.4 Preparation and determination of solution (under light-proof conditions) Weigh 0.05-0.1g (accurate to 0.0002g) of sodium disulfone standard sample and test sample (containing about 50mg of active ingredient) in two 10mL brown volumetric flasks, dissolve it with dimethylformamide and make up to the mark as the mother solution. Use a 0.1mL microsyringe or pipette to draw 0.1mL of mother solution respectively, and evenly spot the sample 2cm from one end of the prepared silica gel plate to form a narrow straight line. After the solvent evaporates, place the thin plate upright in a chromatography cylinder containing a mixed developing agent of chloroform + methanol + ammonia water = 75 + 25 (V/V) and pre-filled with saturated steam. The thin plate is immersed in the developing agent about 0.5-1cm deep. When the front edge of the developing agent reaches 15-16cm, take out the thin plate and place it in a cool place to dry. Scrape off the yellow band with an Rf value of about 0.40, wash it with sodium sulfite solution, and filter it; until the color of the silica gel turns white, transfer all the solution to a 100mL brown volumetric flask, add sodium sulfite solution to the scale, and shake well. Measure the absorbance A at 435nm with sodium sulfite solution as reference. 4.1.5 Calculation
The mass percentage of sodium disulfone (disulfone) is calculated as follows: AXmiXw
Wherein: Ax—absorbance of the sample at 435nm; A,—absorbance of the standard sample at 435nm; m——mass of the standard sample, g;
m2—mass of the sample, g;
the mass percentage of the standard sample,%. 4.1.6 Allowable difference
The difference between the results of two parallel determinations should not be greater than 1.5%. 4.2 Determination of moisture
Carry out according to the azeotropic distillation method in GB1600.
4.3 Determination of pH value
Determine according to the pH meter method in GB1601.
4.4 Determination of fineness
Carry out according to HG2-896.
Inspection rules
5.1 Pesticide acceptance shall be carried out in accordance with GB1604.
5.2 Pesticide sampling methods shall be carried out in accordance with GB1605. 6 Marking, packaging, transportation and purchase and storage
HG2318-92
6.1 The marking of sodium disulfone (dioxon) shall be carried out in accordance with the relevant provisions of GB3796, and the trademark and production license number shall be added. 6.2 Sodium disulfone (dioxon) shall be packaged in clean and dry black or brown plastic bags, each bag is 0.5 or 1kg; or the outer packaging shall be calcium plastic boxes or corrugated paper boxes, each box weighs 25kg.
6.3 During transportation, it must be strictly protected from rain and sunlight. Be careful when handling, loading and unloading to prevent loose packages from contaminating other items. 6.4 Sodium disulfone (dioxon) should be stored in a light-proof, ventilated, dry and cool warehouse, and shall not be placed in the open air or stacked with other items. 6.5 The quality assurance period of this product is 2 years, and the decomposition rate within 2 years shall not exceed 15%. Additional remarks:
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 technically managed by the Shenyang Chemical Research Institute of the Ministry of Chemical Industry. This standard was drafted by Beijing Agricultural University, and Shanghai Pesticide Research Institute, Jilin City Pesticide Factory, Shanghai Jinqiao Chemical Factory, and Dandong City Pesticide Factory participated in the drafting.
The main drafters of this standard are Qian Chuanfan, Shan Guomin, Jia Minghong, Qiu Lihong, and Wei Guoping. 3
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