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Standards GB - Chinese national standards - Page 26

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 10267.1-1988

Method for analysis of calcium metal--The determination of chlorine content by chloride--Selective electrode

Standard published on 30.12.1988

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GB/T 10267.1-2025

Methods for analysis of calcium metal—Part 1:Determination of chlorine by chloride selective electorode method
Execute Date: february 2026

Standard published on 1.8.2025

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GB/T 10267.2-1988

Method for analysis of calcium metal--The determination of micro-amounts of silicon by photometric method

Standard published on 30.12.1988

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GB/T 10267.2-2025

Methods for analysis of calcium metal—Part 2Determination of micro-amounts of silicon by spectrophotometry
Execute Date: february 2026

Standard published on 1.8.2025

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GB/T 10267.3-2008

Method for analysis of calcium metal - Part 3: Direct determination of ironnickelcoppermanganese and magnesium in calcium metal by atomic absorptiom spectrophotometry

Standard published on 2.7.2008

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GB/T 10267.4-1988

Method for analysis of calcium metal--The determination of aluminium by oxine chloroform extraction photometric method

Standard published on 30.12.1988

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GB/T 10267.4-2025

Methods for analysis of calcium metal—Part 4:Determination of aluminum by 8-hydroxyquinoline-trichloromethane extraction spectrophotometry
Execute Date: may 2026

Standard published on 5.10.2025

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GB/T 10267.5-1988

Method for analysis of calcium metal--The determination of nitrogen by distillation--Nessler reagent photometric method

Standard published on 30.12.1988

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