HG/T 2260-1991 Photographic chemicals Sodium benzene sulfinate (for emulsion)
Some standard content:
Chemical Industry Standard of the People's Republic of China
HG.2260-91
Photographic Chemicals
Sodium Benzenesulfinate (for emulsion)
Published on 1991-12-28
Ministry of Chemical Industry of the People's Republic of China
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Jianhua Chemical Industry Standard of the People's Republic of China
Photographic Chemicals Sodium Benzenesulfinate (for emulsion) This product is white flaky crystals. Soluble in water. Structural formula:
SO,Na2H,0
Relative molecular mass: 200.19 (according to the international relative atomic mass in 1987) Subject content and scope of application
HG2260--91
This standard specifies the technical requirements, test methods, inspection rules and packaging, marking, transportation and storage of photographic chemicals sodium benzenesulfinate (for emulsion).
This standard applies to sodium benzenesulfinate used in the preparation of photographic emulsions. 2
Referenced standards
GB6682
Preparation of standard solutions for titration analysis (volume analysis) Chemical reagents Jiang
Preparation of standard solutions for impurity determination
Chemical reagents
Chemical reagents
Preparation of preparations and products used in test methods Chemical reagent sampling and acceptance rules
Laboratory water specifications
General rules for pH determination of chemical reagents:
GB9724
GB9725
GB9739
General rules for potentiometric titration of chemical reagents
General method for determination of iron in chemical reagents
HG 3119
Chemical reagent packaging and marking
HG3—1168
.3 Technical requirements
Preparation and determination method of clarity standard (glass emulsion method) 3.1 Photographic chemicals Sodium benzenesulfinate (emulsion) shall meet the requirements of the following table: Item
Sodium benzenesulfinate (C,H,SO,Na·2H,O), % dissolved
Clarity
Standard approved by the Ministry of Chemical Industry of the People's Republic of China on December 28, 1991. Ba80co.ccm Various standards industry materials free download guide
1 992-07-01 Implementation
Chloride (CI), %
Sulfate (SO), %
Sulfite (SO,)
Iron (Fe), %
Heavy metal (as Pb), %
Photographic properties
Test method
HG2260—91
The standard titration solution, impurity standard solution preparation and products used in this test method shall be prepared in accordance with the provisions of GB601, GB602 and GB603 unless otherwise specified; laboratory water shall comply with the third-grade water specifications in GB6682. 4.1 Determination of the content of sodium benzenesulfinate (CH,SO,Na·2H,O) Weigh 1g of sample, accurate to 0.0001g. Dissolve in 150mL of water. Add 10mL of hydrochloric acid solution (1+1). Titrate the sample solution with sodium nitrite standard titration solution (Ce(NaNO2)=0.1mol/L) on a potentiometric titrator equipped with a calomel electrode and a platinum electrode according to the provisions of GB9725. The content X of sodium benzenesulfinate (CH,SO,Na·2H,) is calculated as follows: X
Where: X
Vcx0.4004
Percentage of sodium benzenesulfinate, %;
Amount of sodium nitrite standard titration solution, mL; X100
-Molar concentration of sodium nitrite standard titration solution, mol/L; -Sample mass, g!
The mass of sodium benzenesulfinate equivalent to 1.00mL sodium nitrite standard titration solution (c(NaNO)=1.000mo1/L) is expressed in grams.
4.2 Determination of solubility
Weigh 10g of sample, accurate to 0.01g, add 50mL of water to dissolve, the sample should be completely dissolved, no insoluble matter 4.3 Determination of clarity
Weigh 5g of sample, accurate to 0.01g, dissolve in 100mL of water, and determine according to the provisions of HG3-1168. The turbidity shall not be greater than the standard.
The standard is clarity No. 6.
4.4 Determination of pH value
Weigh 5g of sample,
the pH value.
Accurate to 0.01g, dissolve in 100mL water, and determine the sample solution at 25℃ according to the provisions of GB9724. Standard exchange network mbz8080ocm various standards industry information free download HG2260-91
4.5 Determination of chloride impurity content
Weigh 0.2g of sample, accurate to 0.01g, place in a 50mL colorimetric tube, add water to dissolve it, add 1mL nitric acid solution (1+1), add 1mL silver nitrate solution (17g/L), dilute with water to the scale, and shake well. Its turbidity shall not be greater than the standard. The standard is to take 0.1mg chloride (CI) impurity standard solution and treat it in the same way as the sample. 4.6 Determination of sulfate impurity contentwwW.bzxz.Net
Weigh 2g of sample, accurate to 0.01g, place in a 50mL colorimetric tube, add warm water (70~80℃) to dissolve it, add 1mL hydrochloric acid solution (1+1), add 5mL barium chloride solution (250g/L), dilute to scale with warm water (70~80℃), and shake well. Leave for 10min, and the degree should not be deeper than the standard
The standard is to take 0.2mg sulfate (SO) impurity standard solution and treat it in the same way as the sample. 4.7 Determination of sulfite impurity
Weigh 0.4g of sample, accurate to 0.01g, add 100mL water to dissolve it, and shake well. Take 10mL of it and place it in a 25mL colorimetric tube, add 1 drop of alkaline fuchsin solution (1g/E), and the red color should not be lighter than the standard. The standard is to add 1 drop of alkaline fuchsin solution (1g/L) in 100mL of water, take 10mL of it in a colorimetric tube of the same specification, 4.8 Determination of thiophenol impurities
Weigh 4g of sample, accurate to 0.01g, and add 20mL of warm water (40~50℃) to dissolve. Smell immediately, there should be no thiophenol odor. 4.9 Determination of iron impurity content
Weigh 2g of sample, accurate to 0.01g, place it in a 25mL colorimetric tube, and determine according to the provisions of GB9739. The sample solution should not be darker than the standard.
The standard is to take 0.002mg of iron (Fe) impurity standard solution and treat it in the same way as the sample. 4.10 Determination of heavy metal impurity content
Weigh 2g of sample, accurate to 0.01g, place in a 50mL colorimetric tube, add water to dissolve. Add 1mL of acetic acid, add 10mL of newly prepared saturated hydrogen aqueous solution, dilute with water to scale, shake well. Leave for 10 minutes, and the dark color should not be darker than the standard. The standard is to take 0.02mg of lead (Pb) impurity standard solution and treat it in the same way as the sample. 4.11 Photographic performance test
Inspection by the purchaser shall comply with the purchaser's specified inspection rules
Sampling and inspection shall be carried out in accordance with the provisions of GB619. 6 Packaging, marking, transportation and storage
6.1 Packaging
Packaging in accordance with the provisions of HG3-119,
Inner packaging form: SD-1;
Outer packaging form: W-5.
If special packaging is required, it shall be determined by negotiation between the supply and demand parties. 6.2 Marking
A firm mark shall be applied on the outer packaging container, indicating the product name, standard number, registered trademark, net weight, gross weight, production batch number, photographic chemicals (for emulsion) and factory date, manufacturer name and address. The inner packaging shall be accompanied by a quality inspection certificate. 6.3 Transportation
Handle with care during transportation, prevent moisture, and do not damage the packaging. 6.4 Storage
Store in a cool, dry warehouse.
Standard control exchange network mm, bsBoso.com. Additional instructions:
HG2260
This standard is proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China and is under the jurisdiction of the Photosensitive Material Technology Development Center of the Ministry of Chemical Industry. 9
This standard was drafted by Suzhou Household Chemicals Factory No. 2, and the Photosensitive Materials Technology Development Center of the Ministry of Chemical Industry and Tianjin Reagent No. 2 participated in the drafting.
The main drafters of this standard are Ma Qi, Hu Suoqin, and Mao Ming. The standard is granted by the website m.bE8080-5cm. Free download of various standard micro industry materials. People's Republic of China
Chemical Industry Standards
Photographic Chemicals
Sodium Benzenesulfinate (for emulsion)
HG2260--91
Editor: Chemical Industry Standards Editorial Department
(Standardization Research Institute of the Ministry of Chemical Industry)
Postal Code: 100013.
Printing Chemical Industry Ministry Standardization Research Institute
Copyright reserved. No reproduction allowed
5 sheets. Word count: 7000
Format: 880×12301/16
First printing in December 1992
First edition in December 1992
Print count: 1500
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2260-91
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