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Standards GB - Chinese national standards - Page 8634
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 7717.13-1994
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Acrylonitrile for industrial use—Determination of acidity—Titrimetric method
WITHDRAWN published on 4.7.1994
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GB/T 7717.14-1994
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Acrylonitrile for industrial use—Determination of content of copper—Spectrophotometric method
WITHDRAWN published on 4.7.1994
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GB/T 7717.15-1994
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Acrylonitrile for industrial use—Determination of content of p-hydroxylanisole—Spectrophotometric method
WITHDRAWN published on 4.7.1994
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GB/T 7717.16-1994
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Acrylonitrile for industrial use—Determination of content of ammonia—Titrimetric method
WITHDRAWN published on 4.7.1994
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GB/T 7717.16-2009
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Acrylonitrile for industrial use—Part 16:Determination of content of iron—Graphite furnace atomic absorption spectrometer method
WITHDRAWN published on 30.10.2009
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GB/T 7717.17-2009
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Acrylonitrile for industrial use—Part 17:Determination of content of copper—Graphite furnace atomic absorption spectrometer method
WITHDRAWN published on 30.10.2009
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GB 7717.2-1987
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WITHDRAWN published on 1.1.1987
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GB/T 7717.2-1994
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Acrylonitrile for industrial use—Detrmination of appearance
WITHDRAWN published on 4.7.1994
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GB/T 7717.3-1987
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Acrylonitrile--Determination of acrylonitrile content
WITHDRAWN published on 9.5.1987
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GB 7717.4-1987
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WITHDRAWN published on 1.1.1987
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