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Standards GB - Chinese national standards - Page 8498
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 6987.21-2001
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Aluminum and aluminum alloys—Determination of calcium content—Flame atomic absorption spectrometric method
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GB/T 6987.22-2001
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Aluminium and aluminium alloys—Determination of beryllium content—SCR spectrophotometric method
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GB/T 6987.23-2001
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Aluminium and aluminium alloys—Determination of antimony content—Potassium iodide spectrophotometric method
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GB/T 6987.24-2001
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Aluminium and aluminium alloys—Determination of the cerium subgroup of rare earth elements content—Tribromoarsenazo spectrophotometric method
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GB/T 6987.25-2001
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Aluminum and aluminum alloys—Determination of cadmium content—Flame atomic absorption spectrometric method
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GB/T 6987.26-2001
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Aluminium and aluminium alloys—Determination of lithium content—Flame atomic absorption spectrometric method
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GB/T 6987.27-2001
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Aluminium and aluminium alloys—Determination of boron content—Ion selective electrode method
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GB/T 6987.28-2001
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Aluminium and aluminium alloys—Determination of strontium content—Flame atomic absorption spectrometric method
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GB/T 6987.29-2001
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Aluminium and aluminium alloys—Determination of copper content—2,9-Dimethyl-1,10-phenanthroline spectrophotometric method
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GB/T 6987.3-2001
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Aluminium and aluminium alloys—Determination of copper content—Falme atomic absorption spectrometric method
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