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GB - Chinese national standards - Page 8799

Standards GB - Chinese national standards - Page 8799

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 6730.30-1986 19.8.1986
GB/T 6730.30-1986 WITHDRAWN

Methods for chemical analysis of iron ores The diphenyl carbazide photometric method for the determination of chromium content

WITHDRAWN published on 19.8.1986

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Preview GB/T 6730.31-1986 19.8.1986
GB/T 6730.31-1986 WITHDRAWN

Methods for chemical analysis of iron ores The benzoylphenyl-hydroxylamine extraction photometric method for the determination of vanadium content

WITHDRAWN published on 19.8.1986

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Preview GB/T 6730.32-1986 19.8.1986
GB/T 6730.32-1986 WITHDRAWN

Methods for chemical analysis of iron ores The ferrous sulfate volumetric method for the determination of vanadium content

WITHDRAWN published on 19.8.1986

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Preview GB/T 6730.33-1986 19.8.1986
GB/T 6730.33-1986 WITHDRAWN

Methods for chemical analysis of iron ores The oscilloscopic polarography method for the determination of tin content

WITHDRAWN published on 19.8.1986

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Preview GB/T 6730.34-1986 19.8.1986
GB/T 6730.34-1986 WITHDRAWN

Methods for chemical analysis of iron ores The pyrocatechol violet-cetyl trimethylamine bromide photometric method for the determination of tin content

WITHDRAWN published on 19.8.1986

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Preview GB/T 6730.35-1986 19.8.1986
GB/T 6730.35-1986 WITHDRAWN

Methods for chemical analysis of iron ores The oxalic acid bis-cyclohexylidene hydragide (cuprizone) photometric method for the determination of copper content

WITHDRAWN published on 19.8.1986

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Preview GB/T 6730.36-1986 19.8.1986
GB/T 6730.36-1986 WITHDRAWN

Methods for chemical analysis of iron ores The flame atomic absorption spectrophotometric method for the determination of cupper content

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Preview GB/T 6730.37-1986 19.8.1986
GB/T 6730.37-1986 WITHDRAWN

Methods for chemical analysis of iron ores The 4-[(5-chloro-2-phridyl)azo]-1,3-diaminobenzene photometric method for the determination of cobalt content

WITHDRAWN published on 19.8.1986

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Preview GB/T 6730.38-1986 19.8.1986
GB/T 6730.38-1986 WITHDRAWN

Methods for chemical analysis of iron ores The nitroso-R salt photometric method for the determination of cobalt content

WITHDRAWN published on 19.8.1986

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Preview GB/T 6730.39-1986 19.8.1986
GB/T 6730.39-1986 WITHDRAWN

Methods for chemical analysis of iron ores—The dimetylglyoxime photometric method for the determination of nickel content

WITHDRAWN published on 19.8.1986

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