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Standards GB - Chinese national standards - Page 6148
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 20975.2-2007
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Chemical analysis methods of aluminium and aluminium alloys—Part 2:Determination of arsenic content—Molybdenum blue spectrophotometric method
WITHDRAWN published on 30.4.2007
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GB/T 20975.20-2008
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Methods for chemical analysis of aluminium and aluminium alloys—Part 20:Determination of gallium content—Butyrhodamine B spectrophotometric method
WITHDRAWN published on 31.3.2008
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GB/T 20975.21-2008
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Methods for chemical analysis of aluminium and aluminium alloys—Part 21:Determination of calcium content—Flame atomic absorption spectrometric method
WITHDRAWN published on 31.3.2008
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GB/T 20975.22-2008
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Methods for chemical analysis of aluminium and aluminium alloys—Part 22:Determination of beryllium content—SCR spectrophotometric method
WITHDRAWN published on 31.3.2008
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GB/T 20975.23-2008
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Methods for chemical analysis of aluminium and aluminium alloys—Part 23:Determination of antimony content—Potassium iodide spectrophotometric method
WITHDRAWN published on 31.3.2008
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GB/T 20975.24-2008
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Methods for chemical analysis of aluminium and aluminium alloys—Part 24:Determination of total rare earth contents
WITHDRAWN published on 31.3.2008
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GB/T 20975.25-2008
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Methods for chemical analysis of aluminium and aluminium alloys—Part 25:Inductively coupled plasma atomic emission spectrometric method
WITHDRAWN published on 9.6.2008
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GB/T 20975.3-2008
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Methods for chemical analysis of aluminium and aluminium alloys—Part 3:Determination of copper content
WITHDRAWN published on 31.3.2008
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GB/T 20975.4-2008
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Methods for chemical analysis of aluminium and aluminium alloys—Part 4:Determination of iron content—Orthopenanthroline photometric method
WITHDRAWN published on 31.3.2008
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GB/T 20975.5-2008
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Methods for chemical analysis of aluminium and aluminium alloys—Part 5:Determination of silicon content
WITHDRAWN published on 31.3.2008
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