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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
Workplace air—Determination of methylene chloride—Direct injection gas chromatographic method
WITHDRAWN published on 23.1.1996
Selected format:-
WITHDRAWN published on 1.1.1986
Selected format:Potassium permanganate for industrial use
WITHDRAWN published on 24.6.1997
Selected format:Potassium permanganate for industrial use
WITHDRAWN published on 14.5.2008
Selected format:Workplace air—Determination of trichloromethane—Direct injection gas chromatographic method
WITHDRAWN published on 23.1.1996
Selected format:Workplace air—Determination of trichloromethane—Solvent desorption gas chromatographic method
WITHDRAWN published on 23.1.1996
Selected format:Workplace air—Determination of carbon tetrachloride—Direct injection gas chromatographic method
WITHDRAWN published on 23.1.1996
Selected format:Workplace air—Determination of carbon tetrachloride—Solvent desorption gas chromatographic method
WITHDRAWN published on 23.1.1996
Selected format:Workplace air—Determination of methyl bromide—Direct injection gas chromatographic method
WITHDRAWN published on 23.1.1996
Selected format:Workplace air—Determination of dichloroethane—Direct injection gas chromatographic method(Apiezon L)
WITHDRAWN published on 23.1.1996
Selected format:Latest update: 2025-11-09 (Number of items: 2 243 571)
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