General rules for methods of analysis for high purity arenaceous quartz

This standard specifies the general requirements for the analysis method of high-purity quartz sand. This standard is applicable to the analysis of various grades of high-purity quartz sand. SJ 3228.2-1989 General rules for the analysis method of high-purity quartz sand SJ3228.2-1989 Standard download decompression password: www.bzxz.net
This standard specifies the general requirements for the analysis method of high-purity quartz sand. This standard is applicable to the analysis of various grades of high-purity quartz sand.

Standard of the Ministry of Machinery and Electronics Industry of the People's Republic of China General Rules for the Analysis Method of High Purity Quartz Sand Www.bzxZ.net
1 Subject Content and Scope of Application
1.1 Subject Content
This standard specifies the general requirements for the analysis method of high purity quartz sand. 1.2 Scope of Application
This standard is applicable to the analysis of various grades of high purity quartz sand. 2 The analytical balance used should be accurate to ±0.2mg. The water used for reagent preparation and analysis is deionized water, and the water value is greater than 2M2. 8
Unless otherwise specified, the reagents used in the analysis are analytically pure. 5 The solutions used in the analysis are aqueous solutions, except for special solvents. 6 The "constant weight" adjusted in the method means that the difference between two consecutive weighings does not exceed ±0.2mg. All concentrations of the standard solutions must be retained to four significant figures. 8 Balances and volumetric instruments must be calibrated regularly. Additional Notes:
This standard was proposed by the Electronic Standardization Research Institute of the Ministry of Machinery and Electronics Industry. SJ3228.2--89
This standard was drafted by the 18th Research Institute of the Ministry of Machinery and Electronics Industry and the Electronic Standardization Research Institute of the Ministry of Machinery and Electronics Industry.
The main drafters of this standard are Qin Guozhen and Liu Chengjun. Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on March 20, 1989 and implemented on March 25, 1989
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