SJ/T 10087.6-1991 Chemical analysis method for main raw materials of color picture tube glass Chemical analysis method for cerium hydroxide SJ/T10087.6-1991 Standard download decompression password: www.bzxz.net

Electronic Industry Standard of the People's Republic of China SJ/1 10087. 1~~10087. 8—91
Chemical analysis method for main raw materials of color picture tube glass
Published on April 8, 1991
Implemented on July 1, 1991
Published by the Ministry of Machinery and Electronics Industry of the People's Republic of China Secondary Industry Standard of the People's Republic of China Chemical analysis method for antimony chlorocyanide
Melt tor chemjcal brualsris ot eerlumhydratc1 Subject content and scope of application
1.1 Subject content
SI/T 10087.6—91
This standard specifies the analysis items of hydrogen decay of color image development materials and the analytical method. 1.2 Scope of application
This standard is used for the physical inspection and external analysis of hydrogen ions used in color picture tube glass raw materials. It is also applicable to the analysis of hydrogen ions used in white image development and other glass raw materials with similar technical requirements. 2 Reference standards
2.1GB9000.1 General principles for electrochemical analysis methods 2.20B5241 Decorative oxides
3 Analysis method
3.1 Analysis with chlorine
3.1.1 Summary of the method
The sample is dissolved in water and oxidized with nitric acid in the presence of silver nitrate. The sample is determined with ferrous standard solution using ferroxene as the indicator.
3.1.2 Reagents
Ceramic acid
b. Supersaturated
1
d. Silver nitrate solution, 1%
Ammonium sulfate standard solution: 0.05N
weigh 2% sodium bicarbonate [(NH4Cl), Fe(50,): -6H4SO4, 0.20g of sodium bicarbonate in a beaker, add 500ml of water, 1:1 60% amine
I. Dichromium bicarbonate standard solution; 0.05N
add potassium disulfide to 1% sodium bicarbonate and bake at 110℃ for 2h, cool. Collect 2.452U& 60cm in a probe cup. After the solution is removed, transfer it into a 0.1 ml permeable bottle and add water to the scale mark. Pipette 25 ml of potassium dichromate standard solution into a soft triangle, add 10 ml of trivalent acid (70 ml of water, 15 ml of isocyanate and 15 ml of hydroxybenzoic acid). Add 1 drop of o-non-acid indicator and titrate with clean iron standard solution until the droplets turn white and red. Approved by the Ministry of Machinery and Electronic Industry of the People's Republic of China on 991-34-3 and implemented on July 1, 1991, the end point is reached. 3.1.3 Sample 10087.6..-91
Put the sample in the air and collect it at 2℃ by the reduction method. Grind it in a mortar (use your finger to control the film until the particles are fine). Cool it in a dry burner for 2h.
3.1.4 Analysis
Accurately take a 0.50 test rod from 530ml of triangular light rod, add 15ml of acid and 58% sulfuric acid, and spread it in a bag. Cover the table and heat it in a bath for about 2 hours. Be careful not to stir with the glass rod to prevent explosion. Remove the table and heat it until white smoke occurs when it touches the acid. Cool it to air for 3m. Warm, carefully add about 20mL water into the beaker, mix the contents and then cool to room temperature. Add 23mL water. Wash the sample and the blood on the surface with water. Cool, the remaining liquid should be about 15mL.
Add 5mL of slightly acidified silver nitrate, heat to about boiling water and cool to room temperature, add a few drops of non-fat indicator, titrate with ammonium ferrous sulfate standard solution, and the solution turns red, which is the full point. 3.1.5 Calculation of the results
The oxidizing agent content in the test sample is calculated according to the following formula: ce003- .rx0 i721 × 10e
In the formula, the concentration of ferrous iron in the standard solution is 1.1%, and the volume of ammonium ferric sulfate is 1.1%; the sample weight is 1.8.
3.7.6 The standard deviation of the sample is less than C.5%.
3.2 Analysis of ferrous oxide
3.2. 1. The difference between the two is to be dissolved in sulphuric acid, potassium hydroxide and trivalent iron are combined to form a hemoglobin solution. Determine by spectrophotometry. 3.2.2 Reagents and solutions: a. Hydrogen peroxide; b. Thiosulfate: 2% nitric acid; d. Atomized iron standard solution: containing re: 0s.01/ml. Weigh 140g of pure iron (99.99%) in a 250ml beaker, add 1.5ml of sulphuric acid, heat and decompose. Boil to remove the oxidizing agent. Cool, transfer to 203ml of a volumetric flask, add water to the mark, pipette 1ml of the above solution into a volumetric flask, dilute to the mark with water, and shake. 3.2.3 Sample: Same as 3.1.3 5.2.4 Analysis Steps Weigh 1g of sample and place it in 1ml flask. Add 3.5ml nitric acid and 1ml hydrogen peroxide solution. Heat on a sand bath to dissolve. Wash with a little water. Heat and evaporate until the sieve solution is about 5ml. Cool and drop into a 10ml volumetric flask. Bring to the mark with water. Pipette 10ml of sample into a 50ml microplate and add 1ml nitric acid and 1ml thiourea to dissolve. Bring to the mark with water. Take part of the color suspension. Use a 3cm colorimetric blood and a reagent vacuum as a reference. Determine the absorbance at 180ml. Absorb the standard ferrous metal ions by filtration. Add 1ml potassium sulfide solution to 10ml of 379 dried 50ml mother bottle. Dissolve the solution with water. Mix well to make a standard solution. 3.2.5 Calculation of analysis results
According to the measured absorbance of the sample solution, the corresponding ferric oxide concentration is deduced from the standard line and the ferric oxide content of the test sample is calculated according to the following formula:
C-v+1c0
wX×ICC
.............2)
Let the concentration of the central ferric oxide standard solution be s/m3, the value obtained by the test method be equivalent to the standard root, ml
W—sample weight.
3.2.6 Precision
Relative standard deviation is less than ,
3.3 Analysis of static soil element total record
According to GBb241.
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This standard is issued by the Electrical Standardization Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the 0 factory and the Neutron Standardization Research Institute of the Ministry of Machinery and Electronics Industry. The main contributors of this standard are Li Guanghui and Liu Chengqing. 27
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