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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 thorium nitrate—Determination of chlorine content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of thorium nitrate—Determination of iron content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of thorium nitrate—Determination of titanium content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of thorium nitrate—Determination of silicon content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of thorium nitrate—Determination of uranium content
WITHDRAWN published on 9.7.1996
Selected format:Rare earth carbonate
WITHDRAWN published on 9.7.1996
Selected format:Light rare earth carbonate
WITHDRAWN published on 31.3.2008
Selected format:H-acid monosodium salt
WITHDRAWN published on 1.1.1984
Selected format:H-acid monosodium salt(1-Amino-8-hydroxy-3,6-naphthalenedisulfonic acid monosodium salt)
WITHDRAWN published on 13.7.2001
Selected format:1-Amino-8-hydroxy-3,6-naphthalenedisulfonic acid monosodium salt(H-acid monosodium salt)
WITHDRAWN published on 28.11.2007
Selected format:Latest update: 2025-09-16 (Number of items: 2 234 278)
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