Some standard content:
Professional Standard of the People's Republic of China
ZB G8 5 00490
Adjusted to: 3573-ge
Photographic grade
Sodium chloride (emulsion, for use)
Published on 1990-04-17
Published by the Ministry of Chemical Industry of the People's Republic of China and implemented on 1990-10-01
Professional Standard of the People's Republic of China
Photographic grade
Sodium chloride (emulsion for use)
This product is a white granular powder, soluble in water. Chemical content and scope of application ZB G85 004. 90 HG/T3573-1990 This standard specifies the technical requirements, test methods, inspection rules and packaging, marking, transportation and storage of photographic grade sodium chloride (emulsion). This standard applies to sodium chloride used in the preparation of photographic emulsions. Reference standards GB 602 Titration analysis (volume analysis) Preparation of standard solutions Chemical reagents Preparation of standard solutions for determination of impurities Chemical reagents GB 619
Chemical counter-agents
Preparation, sampling and acceptance rules for preparations and products used in test methods
GB9723 General rules for flame atomic absorption spectrometry HG3-1168 Preparation and determination of clarity standards for chemical reagents 3 Technical requirements
3.1 Sodium chloride (NaCl) containing not less than:
Photographic grade one, 99.8%
Photographic grade two 99.5%
3.2 Aqueous solution reaction ;Qualified
3.3 Photographic performance: qualified
3.4 Maximum impurity content (indicators in percentage): Name
Clarity test
Water insoluble matter
Volatile matter
Iodide (I)
Bromide (Br)
Sulfate (SO>)
Ministry of Chemical Industry of the People's Republic of China 199004-17 approved index
Photographic level 3
.0. 05
1990-10-01Implementation
Calcium (Ca)
Iron (F)
(Ba)
Heavy metals (in terms of Ph)
Sulfide (in terms of S)
4 Test method
Determination of sodium chloride (NaCl) contentbzxZ.net
ZB G85 004—90
Photographic secondary
Weigh 0.15g of dry weight of the sample, accurate to 0.0001g, dissolve in 70mL of water, add 10mL of starch solution (10g/t.)). Titrate with nitric acid clamp standard titration solution (AgNO:) 0.1mA1/I in the dark under shaking. When close to the end point, add 3 drops of fluorescein indicator solution and continue titrating until the nipple turns pink.
The content of sodium fluoride (NaCl) (X,) is calculated according to formula (1): V.c × 0.058 44 × 100
Wherein: x,
0.058 44.--
-Percentage of sodium chloride, %;
-Amount of standard silver nitrate titration solution, mL: m
Concentration of substance in standard silver nitrate titration solution, mol/L, mass of sample, name;
The amount of sodium chloride equivalent to 1.00mL standard silver nitrate titration solution [(AgNO)-1.000mol/L) expressed in grams.
4.2 Aqueous solution reaction
Weigh 5 samples, weigh to 0.01g, dissolve in 100mL water without carbon dioxide, and measure with an acidometer at 20℃. The pH value should be between 5.0 and 7.0.
4.3 Photographic performance
The method agreed by the supply and demand parties shall be carried out. The user unit shall conduct the test. 4.4 Determination of impurity content
The sample must be weighed to 0.01g.
4.4.1 Clarity test
Weigh 25g sample and dissolve in 100mL water. According to the provisions of HG3-1168, the turbidity shall not be greater than the clarity standard. Photographic grade
Photographic blue grade·
4.4.2. Water-insoluble matter
Weigh 50g of sample, dissolve in 200mL of water, keep warm in a water bath for 1h, filter with a constant-weight No. 4 glass filter, wash the filter residue with hot water until there is no hydride ion reaction, and bake at 105~110℃ to constant weight. The mass of the filter residue shall not be greater than: Photographic grade 1
Photographic grade 2·
4.4.3 Volatile matter
Weigh 3g of sample in a constant-weight weighing bottle: weigh to 0.1mg, and bake at 130±5℃ to constant weight. The content of volatile matter (X2) is calculated according to formula (2): 2.5 mg
Where: X: percentage of volatile matter.%; ZB G85 004—90
The mass of the sample added to the weighing bottle before drying, 8; m
The mass of the sample added to the weighing bottle after drying, B; The mass of the weighing bottle, m.
4.4.4 Iodide
(2)
Weigh 11 g of sample, dissolve it in 50 mL of water, transfer it into a separating funnel, add 2 mL of hydrochloric acid and 5 mL of ferric chloride solution (100 g/L), shake well, and let it stand for 5 min. Add 10 mL of carbon tetrachloride, shake for 1 min, let it stand to separate, collect the carbon tetranitride layer in a colorimetric tube, and then extract it twice with 5 nL of carbon tetrachloride each time, and add it to the colorimetric tube (keep the aqueous solution). The purple color of the organic layer shall not be darker than the standard. The standard is to take 1 island of sample and the following amount of iodine impurity standard solution: Photographic Grade 1
Photographic Grade 2
and sample are treated simultaneously.
4.4.5 Chromic Acid
4.4.5.1 Preparation of Chromic Acid Solution
Weigh 10 g of chromic acid and dissolve it in 100 mL of sulfuric acid (1+3). 4.4.5.2 Test Procedure
0. 2 mg 1
1. 0 mg 1
Extract the aqueous solution in the separating funnel of 4.4.4 twice with 5 mL of carbon tetrachloride each time and discard the carbon tetrachloride. Add 35 mL of sulfuric acid solution (1-1) and 10 mL of chromic acid solution to the solution and shake it. Leave it for 5 minutes. Add 10 mL of carbon tetrachloride and shake it for 1 minute. Leave it to separate the layers. Collect the carbon tetrachloride solution in a colorimetric tube. Extract it twice with 5 mL of carbon tetrachloride and add it to the colorimetric tube. The yellow color of the organic layer should not be darker than the standard. The standard is to take 1 μl of sample and the following amount of impurity standard solution. Photograph the first level
Photograph the second level·
Treat it in the same way as the sample.
4.4.6 Sulfate
4.4.6.1 Preparation of potassium sulfate-barium fluoride solution 1. 0 mg Br
5. 0 mg Br
Accurately weigh 0. 02 g of potassium sulfate. Dissolve it in 100 mL of ethanol (1+2). Take 2.5 mL and mix it with 10 mL of barium chloride solution (250 g/L). Leave it for 1 minute before use.
4.4.6.2 Test steps
Weigh 1 g of sample, dissolve in 10 mL of water, dilute to 20 mL, add 0.5 mL of hydrochloric acid (7→3), add to 1.25 mL of potassium sulfate-barium chloride solution, dilute to 25 mL, and let stand for 5 minutes. The turbidity should not be greater than the standard. The standard is to take the following amount of sulfate impurity standard solution: Photographic Grade 1
Photographic Grade 2
Dilute to 20 mL and mix with the same volume of sample solution at the same time. 4.4.7 Calcium
Determine according to the provisions of GB 9723.
4.4.7.1 Instrument conditions
Light source: calcium hollow cathode lamp
Wavelength: 422.7nm
Flame; air-acetylene
4.4.7.2 Determination method
0. 02 mg O.
0. 05 mg S04
ZB G85 004—90
Weigh 10 g of sample, dissolve it in water, dilute to 100 mL, take 20 ml, a total of four portions, and determine according to the provisions of 6.2.2 of GB 9723. 4.4.8 Iron
Weigh 5 g of sample and dissolve it in water. Adjust the pH to 2.0 with hydrochloric acid (7+3), dilute to 30 mL, add 0.5 mL of ascorbic acid solution (100 g/L), 10 mL of pH 4.5 acetic acid-sodium acetate buffer solution, 3 ml of o-phenanthroline solution (2 g/L), dilute to 50 mL,Leave for 15 minutes. The red color should not be darker than the standard.
The standard is the following iron impurity standard solution: Photo grade 1
Photo grade 2
Process it in the same way as the sample.
0.010 mgFe
0. 025 mg Fc
4.4.9.1 Preparation of sodium chloride-sodium sulfate solution Weigh 0.02 g of sodium chloride and dissolve it in 100 mL of ethanol (1+2). Take 2.5 mL and mix it with 10 mL of sodium sulfate (Na2SO40H.0) solution (400 g/L). Leave it for 1 minute before use. 4.4.9.2 Test steps
Weigh 1g sample: dissolve in 10mL water, dilute to 20mL, add 0.5mL hydrochloric acid solution (7+3), add to 1.25mL sodium chlorate solution, dilute to 25mL, and let stand for 15min. The turbidity should not be greater than the standard. The standard is to take 0.01mg of the standard solution of barium (Ba) impurity, dilute to 20mL, and treat it in the same way as the sample solution. 4.4.10 Heavy metals
Weigh 4g sample, dissolve in water, dilute to 40mL, take 30mL, dilute to 40mL, add 1mL acetic acid (1+16) and 10mL freshly prepared saturated hydrogen sulfide water, shake, and let stand for 10 min. The dark color should not be darker than the standard. The standard is to take the remaining 10mL of sample solution and the following amount of lead impurity standard solution: Photographic Grade
Photographic Grade II
Diluted to 40mL, and treated with the same volume of sample solution at the same time. 4.4.11 Sulfide
4.4.11.1 Preparation of alkaline lead solution
0. 01 mg Pb
0. 02 ng Pb
Add enough sodium hydroxide solution (100g/L) to the lead acetate (Pb(C2H02)23H.0) solution (100g/L) to dissolve the formed precipitate, and slightly in excess.
4. 4.11.2 Test steps
Weigh 5g of sample, dissolve in 25mL of freshly boiled and cooled steamed water, add 2ml of alkaline lead solution, dilute to 50mL with water, mix, and the dark color shall not be darker than the standard.
The standard is to take the following amount of sulfide impurity standard liquid: Photographic grade
Photographic grade 3-
Handle the same as the sample,
5 Inspection rules
Sampling and acceptance shall be carried out in accordance with the provisions of GB619. 6 Packaging, marking, transportation and storage
6.1 Packaging
0. 01 mg s
0. 02 mg s
Packing unit 25kg. The inner packaging is a polyethylene bag and the outer packaging is a polypropylene woven bag. If special packaging is required, it shall be decided by negotiation between the supply and demand parties. 6.2 Marking
ZB G85004—90
The outer packaging container shall be firmly marked with the product name, standard number, trademark, net weight, gross weight, production batch number, photographic grade (emulsion) and grade, production date, manufacturer name and factory address. The packaging container should be accompanied by a quality certificate. 6.3 Transportation
Handle with care during transportation, avoid moisture, and do not damage the packaging. 6.4 Storage
Store in a cool, dry warehouse.
Additional instructions:
This standard was proposed by the National Photographic Materials Standardization Technical Committee: This standard is under the jurisdiction of the Photographic Chemicals Standardization Technical Unit of the Ministry of Chemical Industry. This standard was drafted by Beijing Chemical Factory No. 1. Beijing Chemical Reagent Factory No. 2 participated in the drafting. The main drafters of this standard are Guan Ruibao, Sun Tianzhen, Jiang Jinrong, and Hu Suqin. People's Republic of China
Professional Standard
Photographic Grade
Sodium Chloride (for Emulsion)
ZR G85 001—90
Published by China Standards Press
【Beijing Fuwai Sanlihe
Printed by Beijing Printing Factory of China Standards Press, Xinhua Bookstore, Beijing Distribution Office, Sold by Xinhua Bookstores in various places, copyright exclusive, no reproduction allowed
-06-+00 989 μz
gsley5n
Format 880×12301/16 Printing Sheet 1/2 Academic Number 9000 First Edition December 1990 First Printing December 1990 Printing Quantity 1—1500
9 Price 0.50 Yuan
Number: 155066-2-7729
Heading 14953
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