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Standards GB - Chinese national standards - Page 8499
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 6987.30-2001
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Aluminium and aluminium alloys—Determination of chromium content—Diphenyicarbazide spectrophotometry method after extraction
WITHDRAWN published on 10.7.2001
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GB/T 6987.31-2001
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Aluminium and aluminium alloys—Determination of titanium content—Hydrogen peroxide spectrophotometric method
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GB/T 6987.32-2001
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Aluminium and aluminium alloys—Determination of total rare earth contents—Rare earth oxalate gravimetric method
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GB/T 6987.4-2001
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Aluminium and aluminium alloys—Determination of iron content—Orthopenanthroline photometric method
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GB/T 6987.5-2001
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Aluminium and aluminium alloys—Determination of silicon content—Gravimetric method
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GB/T 6987.6-2001
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Aluminium and aluminium alloys—Determination of silicon content—Molybdenum blue spectrophotometric method
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GB/T 6987.7-2001
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Aluminium and aluminium alloys—Determination of manganese content—Potassium periodate spectrophotometric method
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GB/T 6987.8-2001
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Aluminium and aluminium alloys—Determination of zine content—EDTA titrimetric method
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GB/T 6987.9-2001
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Aluminium and aluminium alloys—Determination of zine content—Flame atomic absorption spectrometric method
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GB 6988.1-1986
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WITHDRAWN published on 1.1.1986
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