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Standards GB - Chinese national standards - Page 220
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 12683-2009
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Method for determining the tensile properties of photographic film and film base
Standard published on 15.12.2009
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GB/T 12684-2018
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Boron compound for industrial use—Methods of test
Standard published on 7.6.2018
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GB/T 12686-2017
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Glyphosate acid technical material
Standard published on 29.12.2017
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GB/T 12688.1-2019
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Test method of styrene for industrial use—Part 1Determination of purity and hydrocarbon impurities—Gas chromatography
Standard published on 4.6.2019
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GB/T 12688.10-2020
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Test method of styrene for industrial use—Part 10: Determination of oxygenates—Gas chromatography
Standard published on 19.11.2020
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GB/T 12688.3-2011
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Test method of styrene for industrial use - Part 3Determination of content of polymer
Standard published on 12.5.2011
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GB/T 12688.4-2011
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Test method of styrene for industrial use - Part 4Determination of content of peroxides - Titrimetric method
Standard published on 12.5.2011
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GB/T 12688.5-2019
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Test method of styrene for industrial use—Part 5Determination of the content of total aldehydes—Titrimetric method
Standard published on 4.6.2019
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GB/T 12688.8-2011
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Test method of styrene for industrial use - Part 8Determination of content of inhibitorp-tert-butylcatechol- Spectrophotometric method
Standard published on 12.5.2011
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GB/T 12688.9-2011
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Test method of styrene for industrial use - Part 9Determination of trace benzene - Gas chromatographic method
Standard published on 12.5.2011
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