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Standards GB - Chinese national standards - Page 5898
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 1819.12-2004
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Methods for chemical analysis of tin concentrates—Determination of silicon dioxide content—The silicomolybdenum blue spectrophotometric method
WITHDRAWN published on 5.2.2004
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GB/T 1819.13-2004
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Methods for chemical analysis of tin concentrates—Determination of magnesium oxide and calcium oxide contents—Flame atomic absorption spectrometric method
WITHDRAWN published on 5.2.2004
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GB/T 1819.14-2006
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Methods for chemical analysis of tin concentrates—Determination of copper content—Flame atomic absorption spectrometric method
WITHDRAWN published on 24.8.2006
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GB/T 1819.15-2006
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Methods for chemical analysis of tin concentrates—Determination of fluorine content—The ion-selective electrode method
WITHDRAWN published on 24.8.2006
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GB/T 1819.16-2006
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Methods for chemical analysis of tin concentrates—Determination of silver content—Flame atomic absoption spectrometric method
WITHDRAWN published on 24.8.2006
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GB/T 1819.17-2006
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Methods for chemical analysis of tin concentrates—Determination of mercury content—The cold vapor atomic absorption spectrometric method
WITHDRAWN published on 24.8.2006
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GB/T 1819.7-2004
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Methods for chemical analysis of tin concentrates—Determination of bismuth content—Flame atomic absorption spectrometric method
WITHDRAWN published on 5.2.2004
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GB/T 1819.8-2004
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Methods for chemical analysis of tin concentrates-Determination of zinc content—Flame atomicabsorption spectrometric method
WITHDRAWN published on 5.2.2004
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GB/T 1819.9-2004
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Methods for chemical analysis of tin concentrates—Determination of tungsten trioxide content—The thiocyanate spectrophotometric method
WITHDRAWN published on 5.2.2004
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GB/T 18190-2000
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Oceanological terminology—Marine geology
WITHDRAWN published on 27.9.2000
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