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Standards GB - Chinese national standards - Page 5227
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 8151.23-2020
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Methods for chemical analysis of zinc concentrates—Part 23: Determination of mercury content—Solid sampling and direct mercury analysis method
Standard published on 29.9.2020
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GB/T 8151.24-2021
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Methods for chemical analysis of zinc concentrates—Part 24Determination of soluble zinc content—Flame atomic absorption spectrometry
Standard published on 30.4.2021
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GB/T 8151.25-2023
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Methods for chemical analysis of zinc concentrates—Part 25:Determination of indium content—Flame atomic absorption spectrometry
Standard published on 23.5.2023
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GB/T 8151.26-2023
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Methods for chemical analysis of zinc concentrates—Part 26:Determination of silver content—Acid dissolution and flame atomic absorption spectrometric method
Standard published on 6.8.2023
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GB/T 8151.3-2012
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Methods for chemical analysis of zinc concentrates - Part 3 Determination of iron content - Na2EDTA titrimetric method
Standard published on 31.12.2012
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GB/T 8151.4-2012
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Methods for chemical analysis of zinc concentrates - Part 4 Determination of silicon dioxide content - Molybdenum blue spectrophotometry
Standard published on 31.12.2012
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GB/T 8151.5-2012
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Methods for chemical analysis of zinc concentrates - Part 5 Determination of lead content - The flame atomic absorption spectrometric method
Standard published on 31.12.2012
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GB/T 8151.6-2012
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Methods for chemical analysis of zinc concentrates - Part 6 Determination of copper content - The flame atomic absorption spectrometric method
Standard published on 31.12.2012
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GB/T 8151.7-2012
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Methods for chemical analysis of zinc concentrates - Part 7 Determination of arsenic content - Hydride generation-atomic fluorescence spectrometry and the potassium bromate titrimetric method
Standard published on 31.12.2012
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GB/T 8151.8-2012
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Methods for chemical analysis of zinc concentrates - Part 8 Determination of cadmium content - The flame atomic absorption spectrometric method
Standard published on 31.12.2012
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