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Standards GB - Chinese national standards - Page 8532
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 6609.28-2004
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Chemical analysis methods and determination of physical performance of alumina—Determination of the fine particle size distribution(less than 60m)-Method using electroformed sieves
WITHDRAWN published on 5.2.2004
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GB/T 6609.3-1986
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Methods for chemical analysis of aluminium oxide--The molybdenum blue photometric method for the determination of silicon dioxide content
WITHDRAWN published on 24.7.1986
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GB/T 6609.30-2009
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Chemical analysis methods and determination of physical performance of alumina—Part 30:X-ray fluorescence spectrometric method for the determination content of trace elements
WITHDRAWN published on 15.4.2009
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GB/T 6609.35-2009
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Chemical analysis methods and determination of physical performance of alumina—Part 35:Determination of specific surface area by nitrogen adsorption
WITHDRAWN published on 15.4.2009
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GB/T 6609.37-2009
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Chemical analysis methods and determination of physical performance of alumina—Part 37:Determination of the particles size content less then 20 m
WITHDRAWN published on 15.4.2009
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GB/T 6609.4-1986
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Methods for chemical analysis of aluminium oxide--The orthophenanthroline photometric method for the determination of ferric oxide content
WITHDRAWN published on 24.7.1986
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GB/T 6609.5-1986
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Methods for chemical analysis of aluminium oxide--The flame photometric method for the determination of sodium oxide content
WITHDRAWN published on 24.7.1986
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GB/T 6609.6-1986
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Methods for chemical analysis of aluminium oxide--The flame photometric method for the determination of potassiumoxide content
WITHDRAWN published on 24.7.1986
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GB/T 6609.6-2004
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Chemical analysis methods and determination of physical performance of alumina—Determination of potassium oxide content-Flame photometric method
WITHDRAWN published on 5.2.2004
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GB/T 6609.7-1986
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Methods for chemical analysis of aluminium oxide--The trioctylphosphine oxide-thiocyanate photometric method for the determination of titanium dioxide content
WITHDRAWN published on 24.7.1986
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