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Standards GB - Chinese national standards - Page 214
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 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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GB/T 12689.1-2010
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Methods for chemical analysis of zinc and zinc alloys - Part 1: Determination of aluminum content - Chromazurol S-polyethylene glycol octyl phenylether-cetylpyridine bromine spectrophotometry, Chromeazurol S spectrophotometric method and EDTA titrimetry
Standard published on 14.1.2011
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GB/T 12689.10-2004
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The methods for chemical analysis of zinc and zinc alloys--The determination of tin content--The phenylfluorone-cetyltrimethyla-mmonium bromide spectrophotometric method
Standard published on 30.4.2004
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GB/T 12689.11-2004
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The methods for chemical analysis of zinc and zinc alloys--The determination of lanthanum and cerium contents--The tri-bromide arsenazo spectrophoto-metric method
Standard published on 30.4.2004
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GB/T 12689.12-2004
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The methods for chemical analysis of zincand zinc alloys--The determination of leadcadmiumironcoppertinaluminiumarsenicstibiummagnesium lanthanum and cerium contents--The inductively coupled plasma-optical emission spectrometric method
Standard published on 30.4.2004
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GB/T 12689.2-2004
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The methods for chemical analysis of zinc and zinc alloys--The determination of arsenic content--The atomic fluorescence spectrometer method
Standard published on 30.4.2004
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