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Standards GB - Chinese national standards - Page 6022
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/T 14352.14-1993
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Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of gallium content—Rhodamine B photometric method after butylacetate extraction
WITHDRAWN published on 12.5.1993
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GB/T 14352.15-1993
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Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of germanium content—Distillation separation-phenyl fluorone cetyltrimethyl-ammonium bromide phtometric method
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GB/T 14352.16-1993
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Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of selenium content—3,3""-diaminobenzidine photometric method
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GB/T 14352.17-1993
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Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of tellurium content—butyl-Rhodamine B photometric method
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GB/T 14352.18-1993
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Methods for chemical analysis of tungsten ores molybdenum ores—Determination of rhenium content—Potassium thiocynate photometric method
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GB/T 14352.2-1993
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Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of molybdenum content—Potassium thiocynate photometric method
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GB/T 14352.3-1993
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Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of copper content—Flame atomic absorption spectrometric method
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GB/T 14352.4-1993
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Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of lead content—Flame atomic absorption spectrometric method
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GB/T 14352.5-1993
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Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of zinc content—Flame atomic absorption spectrometric method
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GB/T 14352.6-1993
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Methods for chemical analysis of tungsten ores molybdenum ores—Determination of cadmium content—Flame atomic absorption spectrometric method
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