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Standards GB - Chinese national standards - Page 8392
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 6276.4-1986
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Ammonium hydrogen carbonate for industrial use—Determination sulphate content—Visible turbidimetric method
WITHDRAWN published on 18.4.1986
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GB/T 6276.4-2010
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Determination of ammonium hydrogen carbonate for industrial use—Part 4:Sulphate content—Visible turbidimetric method
WITHDRAWN published on 30.6.2010
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GB/T 6276.5-1986
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Ammonium hydrogen carbonate for industrial use—Determination of ash content—Gravimetric method
WITHDRAWN published on 18.4.1986
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GB/T 6276.5-2010
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Determination of ammonium hydrogen carbonate for industrial use—Part 5:Ash content—Gravimetric method
WITHDRAWN published on 30.6.2010
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GB/T 6276.6-1986
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Ammonium hydrogen carbonate for industrial use—Determination of iron content—O-Phenanthroline spectrophotometric method
WITHDRAWN published on 18.4.1986
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GB/T 6276.6-2010
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Determination of ammonium hydrogen carbonate for industrial use—Part 6:Iron content—o-Phenathroline spectrophotometric method
WITHDRAWN published on 30.6.2010
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GB/T 6276.7-1986
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Ammonium hydrogen carbonate for industrial use—Determination of arsenic content—Silver diethyl dithiocarbamate photometric method
WITHDRAWN published on 18.4.1986
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GB/T 6276.7-2010
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Determination of ammonium hydrogen carbonate for industrial use—Part 7:Arsenic content—Silver diethyl dithiocarbamate photometric method
WITHDRAWN published on 30.6.2010
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GB/T 6276.8-1986
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Ammonium hydrogen carbonate for industrial use—Determination of arsenic content—Gutzeit method
WITHDRAWN published on 18.4.1986
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GB/T 6276.8-2010
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Determination of ammonium hydrogen carbonate for industrial use—Part 8:Arsenic content—Gutzeit method
WITHDRAWN published on 30.6.2010
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