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Standards GB - Chinese national standards - Page 6023
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 14352.7-1993
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Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of cobalt content—Polarographic method in dimethylglyoxime-sulfosalicylic acid-ammonium hydroxide-ammonium chloride system
WITHDRAWN published on 12.5.1993
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GB/T 14352.8-1993
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Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of nickel content—Polarographic method in dimethylglyoxime-sulfosalicylic acid-ammonium hydroxide-ammonium chloride system
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GB/T 14352.9-1993
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Methods for chemical analysis of tungsten ores and molybdenum ores—Determination of totol sulfur content—Iodometric method after combustion
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GB/T 14353.1-1993
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Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of copper
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GB/T 14353.10-1993
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Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of tungsten content—Catalytic polarographic method in sulfuric acid-phenylhydroxy acetic acid-cinchonine-potassium chlorate system
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GB/T 14353.11-1993
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Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of silver content—Flame atomic absorption spectrometric method
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GB/T 14353.12-1993
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Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of sulfur
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GB/T 14353.13-1993
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Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of gallium content—Rhodamine B photometric method after butylacetate extraction
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GB/T 14353.14-1993
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Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of germanium content—Phenylfluorone-cetyltrimethyl ammonium bromide photometric method after carbon tetrachloride extraction
WITHDRAWN published on 12.5.1993
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GB/T 14353.15-1993
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Methods for chemical analysis of copper ores lead ores and zinc ores—Determination of selenium content—3,3""-diaminobenzidine photometric method
WITHDRAWN published on 12.5.1993
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