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GB - Chinese national standards - Page 7497

Standards GB - Chinese national standards - Page 7497

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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Preview GB/T 3256.7-1982 21.6.1982
GB/T 3256.7-1982 WITHDRAWN

Chemical analysis of zirconium powder for electro-vacuum uses--The methylene blue photometric method for determination of sulphur

WITHDRAWN published on 21.6.1982

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Preview GB/T 3256.8-1983 19.10.1983
GB/T 3256.8-1983 WITHDRAWN

Methods for chemical analysis of zirconium powder for electro-vacuum uses—The combustion-gravimetric method for the determination of hydrogen content

WITHDRAWN published on 19.10.1983

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Preview GB/T 3257.1-1999 30.8.1999
GB/T 3257.1-1999 WITHDRAWN

Methods for chemical analysis of bauxite—Determination of aluminium oxide content-EDTA titrimetric method

WITHDRAWN published on 30.8.1999

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Preview GB/T 3257.10-1999 30.8.1999
GB/T 3257.10-1999 WITHDRAWN

Methods for chemical analysis of bauxite—Determination of manganese oxide content—Flame atomic absorption spectrophotometric method

WITHDRAWN published on 30.8.1999

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Preview GB/T 3257.11-1999 30.8.1999
GB/T 3257.11-1999 WITHDRAWN

Methods for chemical analysis of bauxite—Determination of chromium oxide content—Flame atomic absorption spectrophotometric method

WITHDRAWN published on 30.8.1999

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Preview GB/T 3257.12-1999 30.8.1999
GB/T 3257.12-1999 WITHDRAWN

Methods for chemical analysis of bauxite—Determination of vanadium pentoxide content—N-benzoyl-N-phenythyroxylamine photometric method

WITHDRAWN published on 30.8.1999

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Preview GB/T 3257.13-1999 30.8.1999
GB/T 3257.13-1999 WITHDRAWN

Methods for chemical analysis of bauxite—Determination of zinc content—Flame atomic absorption spectrophotometric method

WITHDRAWN published on 30.8.1999

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Preview GB 3257.14-1982 1.1.1982
GB 3257.14-1982 WITHDRAWN

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WITHDRAWN published on 1.1.1982

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Preview GB/T 3257.15-1999 30.8.1999
GB/T 3257.15-1999 WITHDRAWN

Methods for chemical analysis of bauxite—Determination the total content of rare earth oxide—Tribromo-arsenazo photometric method

WITHDRAWN published on 30.8.1999

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Preview GB/T 3257.16-1999 30.8.1999
GB/T 3257.16-1999 WITHDRAWN

Methods for chemical analysis of bauxite—Determination of gallium oxide concent—Rhodamine B-extraction photometric method

WITHDRAWN published on 30.8.1999

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