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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—Determination of tellurium content—Graphite furnace atomic absorption spectrometric method
WITHDRAWN published on 12.5.1993
Selected format:Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of lead
WITHDRAWN published on 12.5.1993
Selected format:Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of zinc
WITHDRAWN published on 12.5.1993
Selected format:Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of cadmium
WITHDRAWN published on 12.5.1993
Selected format:Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of nickel
WITHDRAWN published on 12.5.1993
Selected format:Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of cobalt
WITHDRAWN published on 12.5.1993
Selected format:Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of arsenic content—Silver diethyl-dithiocarbamate photometric method
WITHDRAWN published on 12.5.1993
Selected format:Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of bismuth content Hydride generation-atomic fluorescence spectrometric method
WITHDRAWN published on 12.5.1993
Selected format:Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of molybdenum
WITHDRAWN published on 12.5.1993
Selected format:Food containers of glass fiber reinforced unsaturated polyester resin
WITHDRAWN published on 29.4.1993
Selected format:Latest update: 2026-04-10 (Number of items: 2 271 455)
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