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Standards GB - Chinese national standards - Page 5083
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 6609.34-2009
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Chemical analysis methods and determination of physical performance of alumina - Part 34: Method of calculating alumina content
Standard published on 15.4.2009
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GB/T 6609.35-2023
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Chemical analysis methods and determination of physical performance of alumina—Part 35:Determination of specific surface area—Nitrogen adsorption method
Standard published on 6.8.2023
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GB/T 6609.36-2009
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Chemical analysis methods and determination of physical performance of alumina - Part 36: Determination of flow time
Standard published on 15.4.2009
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GB/T 6609.4-2004
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Chemical analysis methods and determination of physical performance of alumina--Determination of ferric oxide content--Orthophenanthroline photometric method
Standard published on 5.2.2004
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GB/T 6609.5-2004
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Chemical analysis methods and determination of physical performance of alumina--Determination of sodium oxide content
Standard published on 5.2.2004
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GB/T 6609.5-2026
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Chemical analysis methods and determination of physical performance of alumina—Part 5Determination of sodium oxide and potassium oxide contents
Execute Date: december 2026
Standard published on 25.5.2026
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GB/T 6609.6-2018
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Chemical analysis methods and determination of physical performance of alumina—Part 6Determination of potassium oxide content
Standard published on 14.5.2018
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GB/T 6609.7-2004
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Chemical analysis methods and determination of physical performance of alumina--Determination of titanium dioxide content--Diantiprylmehane photometric method
Standard published on 5.2.2004
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GB/T 6609.7-2026
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Chemical analysis methods and determination of physical performance of alumina—Part 7:Determination of titanium dioxide, chromium sesquioxide, cupric oxide,fluorine, chlorine, boron trioxide, phosphorus pentoxide, sulfate contents—Spectrophotometry method
Execute Date: december 2026
Standard published on 25.5.2026
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GB/T 6609.8-2004
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Chemical analysis methods and determination of physical performance of alumina--Determination of chromium sesquioxide content--Diphenyl carbazide photometric method
Standard published on 5.2.2004
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