SJ/T 10087.4-1991 Chemical analysis methods for main raw materials of color picture tube glass Chemical analysis methods for limestone SJ/T10087.4-1991 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 Methods 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 Electronic Industry Standard of the People's Republic of China Chemical Analysis Methods for Main Raw Materials of Color Picture Tube Glass
Methods for Chemical Analysis of Raw Materials of Color Picture Tube Glass
Methods for Chemical Analysis of Raw Materials of Color Picture Tube Glass1Main Content and Applicable Scope
1.tSubject Content
85/T 10087. 4—81
This standard specifies the classification and separation methods of raw materials of color picture tube glass. 1.2 Scope of Application
This standard is applicable to routine inspection or arbitration analysis of raw materials of color picture tube glass. It is also applicable to the analysis of ash and other raw materials for glass with similar technical requirements for cumulative white picture tubes. 2 Reference standards
2.1 9C00.1 General principles for chemical analysis of electronic glass 2.2 SJ/19027.2 Chemical analysis of white cloud elements 3 Analysis methods
3.1 Analysis of oxidized sodium
3.1.1 Summary
Dissolve the solution in salt solution and separate the residual sodium (Si). After the filtrate and washing process are released into the analyte, titrate the calcium with HITA standard solution at an appropriate H2O2 level.
3.1.? Reagents: 1% hydrochloric acid, 1% hydroxylamine, 2% NN indicator, 1% NN indicator 01 and 1% chlorine in the seawater, stored in a brown bottle; 1% chrome black indicator (ED1) dissolved in 75% diethylamine and 25ml cyanol, stored in a brown bottle; 2% yttrium taurateurine standard solution: 1% chloroacetic acid, stored in a brown bottle; 2% iodine black indicator (ED1) dissolved in 75% diethylamine and 25ml cyanol, stored in a brown bottle; 3% iodine black indicator (ED1) dissolved in 75% diethylamine and 25ml cyanol, stored in a brown bottle; 4% iodine black indicator (ED1) dissolved in 75% diethylamine and 25ml cyanol, stored in a brown bottle; 5% iodine black indicator (ED1) dissolved in 75% diethylamine and 25ml cyanol, stored in a brown bottle; 6% iodine black indicator (ED1) Dissolve with water and grind to calibrate 100ml: adsorb zinc standard filter (C.02M>25 add 75% water, add 20% hydrogen peroxide to reduce the pH to 1.0:1 buffer solution, 1 drop of chromium indicator. Use EDTA standard filter to determine the point when the wine turns red. Calculate the EDTA standard solution according to the approval of the Ministry of Machinery and Electronics Industry of the People's Republic of China on 1891-04-38 and implementation on 1991-070. Zinc standard filter: 0.02M S/T 100B7.4—91
Accurately weigh pure zinc (99.93%) (L> 0.6538g). Add 50ml water, 2: (75ml hydrochloric acid, 5 drops of deionized water, heat to dissolve and slightly dissolve for a while. After cooling, transfer to a 535m) tea bottle and dilute with water to the remainder. 3.1.3 Sample
Take about 20% of the sample to be tested by the steel plate method. Grind it in the agate grinding body (when the fingers are lightly passed, the particles are felt), and dry it in a constant temperature of 113 for 2 minutes. Place it in a lower container and cool it to the desired temperature. 3. 1. 4 Analysis Steps
Weigh the sample 1. Place a 1/2 beaker and moisten it with water; cover the surface and gradually add 1:5 ml of hydrochloric acid along the base of the beaker. After the reaction is completed, wash the wall and surface of the beaker with water, add 10 nmol/100 μl of peroxyacid and shake well. Heat on a sand bath until smoke appears, cover the surface and continue to rise for about 10 minutes, cool, add 5 nmol/100 μl of salt and 50 nmol/100 μl of water. Filter with a high-efficiency filter, wash once with water, collect the filtered and washed filters in a 250 ml volumetric flask, and transfer the precipitate from the filter paper. Combust, oxidize, cool, add 10 nmol/100 μl of hydrochloric acid and peroxyacid. , heat on a sand bath to remove all silica. Cool, add 2 ml of molten salt. Transfer 2 ml of the solution to a 250 ml volumetric flask and take 10 minutes to the mark. This is solution A: pipette 2 ml of A into 30 ml of water, add 75 ml of 2-hydroxylamine, the concentration should be 12.5-13.0 (approximately 5 ml of 20% potassium hydroxide). Add a little N. indicator. Titrate the EDTA standard solution until the solution turns pure blue, which is the critical point. Record the reading. 3.1.5 Calculation of analysis results
Calculate the calcium content in the test sample as follows: CaO (%) 250 × 100 bzxZ.net
25 × 100X
EDTA standard solution X oxidation standard, mg/ml: V consumed EDTA standard solution volume, mI
standard sample volume·s.
3.1.6 Precision
Relative standard deviation less than D.?%,
3.2 Analysis of ferrous oxide
Same as 3.2 of SJ/110087.2
33 Analysis of ferrous trioxide
Same as 3.3 of SJ/110087.2
Additional remarks:
This standard is the responsibility of the Electronic Standards Research Institute of the Ministry of Machinery and Electronics Industry and the Electrical Standards Research Institute of the Ministry of Machinery and Electronics Industry. The main contributor of this standard is Feng Guanghui, Xiao Chengjun 18
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