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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Methods for chemical analysis of silicate rocks—Part 14:Determination of ferrous oxide content
Standard published on 10.11.2010
Selected format:Methods for chemical analysis of silicate rocks - Part 15: Determination of lithium content
Standard published on 10.11.2010
Selected format:Methods for chemical analysis of silicate rocks - Part 16: Determination of rubidium content
Standard published on 10.11.2010
Selected format:Methods for chemical analysis of silicate rocks - Part 17: Determination of strontium content
Standard published on 10.11.2010
Selected format:Methods for chemical analysis of silicate rocks - Part 18: Determination of copper content
Standard published on 10.11.2010
Selected format:Methods for chemical analysis of silicate rocks - Part 19: Determination of lead content
Standard published on 10.11.2010
Selected format:Methods for chemical analysis of silicate rocks - Part 2: Determination of combined water content
Standard published on 10.11.2010
Selected format:Methods for chemical analysis of silicate rocks - Part 20: Determination of zinc content
Standard published on 10.11.2010
Selected format:Methods for chemical analysis of silicate rocks - Part 21: Determination of nickel and cobalt content
Standard published on 10.11.2010
Selected format:Methods for chemical analysis of silicate rocks—Part 22:Determination of vanadium content
Standard published on 10.11.2010
Selected format:Latest update: 2026-04-15 (Number of items: 2 272 661)
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