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Standards GB - Chinese national standards - Page 5038
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 6150.13-2022
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Methods for chemical analysis of tungsten concentrates—Part 13Determination of arsenic content—Atomic fluorescence spectrometry and the silver diethyldithiocarbamateDDTC-Agspectrophotometry
Standard published on 12.10.2022
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GB/T 6150.14-2008
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Methods for chemical analysis of tungsten concentrates - Determination of manganese content - The ammonium ferrous sulfate volumetric method and flame atomic absorption spectrometric method
Standard published on 31.3.2008
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GB/T 6150.15-2023
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Methods for chemical analysis of tungsten concentrates—Part 15Determination of bismuth content—Hydride generation atomic fluorescence spectrometry and flame atomic absorption spectrometry
Standard published on 6.8.2023
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GB/T 6150.16-2009
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Methods for chemical analysis of tungsten concentrates - Determination of iron content - The sulfosalicylic acid spectrophotometry
Standard published on 30.10.2009
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GB/T 6150.16-2026
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Methods for chemical analysis of tungsten concentrates—Part 16: Determination of iron, manganese, silicon, calcium and tungsten contents—X-ray fluorescence spectrometry
Execute Date: december 2026
Standard published on 25.5.2026
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GB/T 6150.17-2022
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Methods for chemical analysis of tungsten concentrates—Part 17Determination of antimony content—Atomic fluorescence spectrometry
Standard published on 12.10.2022
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GB/T 6150.18-2023
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Methods for chemical analysis of tungsten concentratesPart 18Determination of barium contentInductively coupled plasma atomic emission spectrometry
Standard published on 23.5.2023
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GB/T 6150.19-2025
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Methods for chemical analysis of tungsten concentrates—Part 19:Determination of fluoride content—Ion selective electrode method
Standard published on 24.1.2025
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GB/T 6150.2-2022
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Methods for chemical analysis of tungsten concentrates—Part 2: Determination of tin content—Potassium iodate titrimetry and inductively coupled plasma atomic emission spectrometry
Standard published on 12.10.2022
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GB/T 6150.20-2025
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Methods for chemical analysis of tungsten concentrates—Part 20Determination of mercury contentSolid sampling and direct mercury analysis method
Standard published on 24.1.2025
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