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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 copper ores, lead ores and zinc ores - Part 10: Determination of tungsten content
Standard published on 10.11.2010
Selected format:Methods for chemical analysis of copper ores, lead ores and zinc ores - Part 11: Determination of silver content
Standard published on 10.11.2010
Selected format:Methods for chemical analysis of copper ores, lead ores and zinc ores - Part 12: Determination of sulfur content
Standard published on 10.11.2010
Selected format:Methods for chemical analysis of copper ores, lead ores and zinc oresPart 13: Determination of gallium contentindium contentthallium contenttungsten content and molybdenum content
Standard published on 5.12.2014
Selected format:Methods for chemical analysis of copper ores, lead ores and zinc ores—Part 14: Determination of germanium content
Standard published on 5.12.2014
Selected format:Methods for chemical analysis of copper ores, lead ores and zinc oresPart 15: Determination of selenium content
Standard published on 5.12.2014
Selected format:Methods for chemical analysis of copper ores, lead ores and zinc ores - Part 16: Determination of tellurium content
Standard published on 10.11.2010
Selected format:Methods for chemical analysis of copper ores, lead ores and zinc oresPart 17: Determination of thallium content
Standard published on 5.12.2014
Selected format:Methods for chemical analysis of copper ores, lead ores and zinc oresPart 18: Determination of copper contentlead contentzinc contentcobalt content and nickel content
Standard published on 5.12.2014
Selected format:Methods for chemical analysis of copper ores, lead ores and zinc ores—Part 19:Determination of tin content—Hydride generation atomic fluorescence spectrometry
Standard published on 18.10.2019
Selected format:Latest update: 2026-06-14 (Number of items: 2 282 206)
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