HG/T 2336-1992 Photographic chemicals Sodium ethylenediaminetetraacetate iron trihydrate
Some standard content:
Chemical Industry Standard of the People's Republic of China
Photographic Chemicals
Sodium Iron Ethylenediaminetetraacetate Trihydrate
This product is a brownish yellow crystalline powder, soluble in water. Molecular formula: C,H12FeN,NaO.·3H,0
Relative molecular weight: 421.10 (according to the 1989 international relative atomic mass) Subject content and scope of application
HG/T2336-92
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of the photographic chemical sodium iron ethylenediaminetetraacetate trihydrate.
This standard applies to sodium iron ethylenediaminetetraacetate trihydrate used for processing exposed photosensitive materials. 2 Reference standards
Chemical reagents Preparation of standard solutions for titration analysis (volume analysis) GB602
Chemical reagents Preparation of standard solutions for impurity determination GB603
Chemical reagents
Preparation of preparations and products used in test methods GB619, Sampling and acceptance rules for chemical reagents GB6682
GB9724
3 Technical requirements
Laboratory water specifications
General rules for pH determination of chemical reagents
Photographic chemicals Ethylenediaminetetraacetic acid trihydrate Sodium iron should meet the following requirements: Item
Content (CHFeN,NaO,3H,O), %
pH value (20C)
Appearance of solution
Water-insoluble matter, %
Test method
The standard solution for titration analysis, standard solution for impurity determination and preparations and products used in this test method are prepared in accordance with GB601, GB602 and GB603: The water used in the experiment should meet the specifications of grade 3 water in GB6682. If additional provisions are required, they shall be given in the standard.
4.1 Determination of the content of sodium ferric ethylenediaminetetraacetate trihydrate (CroH,FcN,NaO3H,O) Approved by the Ministry of Chemical Industry of the People's Republic of China on June 1, 1992 Standard change order m.basso.ccam 1993-03-01 Implementation
HG/T2336-92
Weigh 1g of sample, accurate to 0.0001g, dissolve it in a 500mL iodine volumetric flask, add 50mL of warm water to dissolve. After cooling, add 3g of potassium iodide and 12mL of hydrochloric acid, shake well, let stand for 20min, and then titrate with sodium thiosulfate standard titration solution (c(NazS,0,)=0.1mol/L). When it is close to the end point, add 2mL of starch indicator solution (5g/L) and continue to titrate until the blue color disappears as the end point, and do a blank test at the same time.
The mass content X(%) of sodium ferric ethylenediaminetetraacetate trihydrate (C1oHz2FcN2NaO·3H,O) is calculated according to formula (1): X
(VV,).c×0.421 1
Wherein: V—the amount of sodium thiosulfate standard titration solution used when titrating the sample, mL; V—the amount of sodium thiosulfate standard titration solution used when titrating the blank test, mL; the actual concentration of sodium thiosulfate standard titration solution, mol/L; the mass of the sample, g;
—with 1.00mL sodium thiosulfate standard titration solution (c(NazS,0g)=1.000mol/ L) equivalent, in grams, the mass of sodium iron trihydrate of ethylenediaminetetraacetate expressed as 0.4211
, 4.2 Determination of pH value
Weigh 1.0g of sample, accurate to 0.01g, dissolve in 100mL of water, and determine the pH value of the sample solution at 20°C according to the provisions of GB9724.
4.3 Inspection of solution appearance
Weigh 5g of sample, dissolve in 100mL of water, the solution should be clear, without obvious suspended matter or sediment (retain the test solution for the determination of water-insoluble matter).
4.4 Determination of water-insoluble matter
Take the test solution in 4.3, filter it with a No. 4 sand core funnel that has been dried to constant weight at 105~110℃, and wash it three times with 100mL of industrial water, and then dry it to constant weight at 105~110℃.
The mass content of water-insoluble matter, X(%) is calculated according to formula (2): X
Where: mz
The mass of a sand core funnel plus filter residue, g;
The mass of a sand core funnel, g
The mass of a sample, g.
5°Inspection rules
5.1 This product shall be inspected by the quality inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that all products leaving the factory meet the requirements of this standard.
5.2 The user has the right to inspect the received products in accordance with the provisions of this standard. 5.3 Sampling shall be carried out in accordance with the provisions of GB619.
5.4 If one of the indicators in the test results does not meet the requirements of this standard, samples should be taken from twice the amount of packaging for re-testing. If only one indicator does not meet the requirements of this standard, the batch of products cannot be accepted. 5.5 When the supply and demand parties have objections to the product quality, they can negotiate to resolve the issue. If arbitration is required, it can be handled in accordance with the "Interim Measures for National Product Quality Arbitration Inspection".
6 Packaging, marking, transportation, purchase and storage
6.1 Packaging
Standard exchange network mow.bz total o (ecnHG/T 2336- 92
Inner packaging: sealed plastic bottles. Net weight of each bottle is 500g. Outer packaging: 20 bottles in one box.
Special packaging can be negotiated by both parties. 6.2 Marking
The outer packaging box shall be firmly marked with product name, standard number, registered trademark, net weight, gross weight, production batch number, photographic chemicals and date of manufacture, manufacturer name and address. Each batch of product box leaving the factory is accompanied by a quality inspection certificate, and a label is affixed to the inner packaging, on which is printed the product name, standard number, registered trademark, net weight, production batch number, photographic chemicals and date of manufacture, manufacturer namebZxz.net
6.3 Transportation
Products should be handled with care during transportation and protected from heat, rain and moisture. -6.4 Dai Cun
The product should be stored in a ventilated and dry place. Protect from heat, rain and direct exposure. Additional instructions:
This standard is 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 jurisdiction of the Photosensitive Material Technology Development Center of the Ministry of Chemical Industry. This standard is drafted by Guangzhou Photographic Chemical Material Factory, and the Photosensitive Material Technology Development Center of the Ministry of Chemical Industry participated in the drafting. The main drafters of this standard are Huang Weiqi and Hu Suqin. This standard refers to some items, indicators and test methods of sodium ferric ethylenediaminetetraacetate trihydrate in the American national standard ANSIPH4.189-1984 "Photographic grade ammonium ethylenediaminetetraacetate iron bath and sodium ferric ethylenediaminetetraacetate trihydrate". 8.
Standard screen changerom.bao0agk9o
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