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Standards GB - Chinese national standards - Page 5099
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 5121.20-2008
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Methods for chemical analysis of copper and copper alloys - Part 20:Determination of zirconium content
Standard published on 17.6.2008
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GB/T 5121.21-2008
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Methods for chemical analysis of copper and copper alloys - Part 21:Determination of titanaum content
Standard published on 17.6.2008
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GB/T 5121.22-2008
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Methods for chemical analysis of copper and copper alloys - Part 22:Determination of cadmium content
Standard published on 17.6.2008
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GB/T 5121.23-2008
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Methods for chemical analysis of copper and copper alloys - Part 23:Determination of silicon content
Standard published on 17.6.2008
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GB/T 5121.24-2008
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Methods for chemical analysis of copper and copper alloys - Part 24:Determination of selenium and tellurium content
Standard published on 17.6.2008
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GB/T 5121.25-2008
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Methods for chemical analysis of copper and copper alloys - Part 25: Determination of boron content
Standard published on 17.6.2008
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GB/T 5121.26-2008
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Methods for chemical analysis of copper and copper alloys - Part 26:Determination of mercury content
Standard published on 17.6.2008
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GB/T 5121.27-2008
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Methods for chemical analysis of copper and copper alloys - Part 27:The inductively coupled plasma atomic emission spectromertric method
Standard published on 17.6.2008
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GB/T 5121.28-2021
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Methods for chemical analysis of copper and copper alloys—Part 28Determination of chromium,iron,manganese,cobalt,nickel,zinc,arsenic,selenium,silver,cadmium,tin,antimony,tellurium,lead and bismuth content—Inductively coupled plasma-mass spectrometry
Standard published on 31.12.2021
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GB/T 5121.29-2015
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Methods for chemical analysis of copper and copper alloys—Part 29: Determination of aluminium oxide content
Standard published on 11.9.2015
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