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Standards GB - Chinese national standards - Page 8730
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
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GB 8220.7-1987
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WITHDRAWN published on 1.1.1987
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GB/T 8220.7-1998
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Methods for chemical analysis of bismuth—Determination of arsenic content—Ion exchange separation-hydride generation-flame atomic absorption spectrophotometric method
WITHDRAWN published on 19.8.1998
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GB 8220.8-1987
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WITHDRAWN published on 1.1.1987
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GB/T 8220.8-1998
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Methods for chemical analysis of bismuth—Determination of chlorine content—Distillation-mercuric thiocyanate photometric method
WITHDRAWN published on 19.8.1998
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GB 8220.9-1987
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WITHDRAWN published on 1.1.1987
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GB/T 8220.9-1998
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Methods for chemical analysis of bismuth—Determination of tellurium content-Coprecipitation with arsenic-oscillopolarog raphic method
WITHDRAWN published on 19.8.1998
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GB 8221.1-1987
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Methods for chemical analysis of indium--The molybdenum blue photometric method for the determination of arsenic content
WITHDRAWN published on 1.1.1987
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GB 8221.2-1987
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Methods for chemical analysis of indium--The phenylfluorone-cetyl trimethyl ammonium bromides photometric method for the determination of tin content
WITHDRAWN published on 1.1.1987
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GB 8221.3-1987
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Methods for chemical analysis of indium--The methyl green photometric method for the determination of thallium content
WITHDRAWN published on 1.1.1987
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GB 8221.4-1987
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Methods for chemical analysis of indium--The chromazurol S-tetradecyl pyridine bromide photometric method for the determination of aluminium content
WITHDRAWN published on 1.1.1987
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