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Standards GB - Chinese national standards - Page 5197
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 8151.16-2005
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Methods for chemical analysis of zinc concentrates-Determination of cobalt content-Flame atomic absorption spectrometer method
Standard published on 26.7.2005
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GB/T 8151.17-2012
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Methods for chemical analysis of zinc concentrates - Part 17Determination of zinc content - Hydroxide precipitation and Na2EDTA titrimetric method
Standard published on 31.12.2012
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GB/T 8151.18-2012
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Methods for chemical analysis of zinc concentrates - Part 18 Determination of zinc content - Ion-exchange/ Na2EDTA titrimetric method
Standard published on 31.12.2012
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GB/T 8151.19-2012
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Methods for chemical analysis of zinc sulfide concentrates - Part 19Determination of silver and gold contents - Fire assay and flame atomic absorption spectrometric method using scorification or cupellation
Standard published on 31.12.2012
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GB/T 8151.2-2012
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Methods for chemical analysis of zinc concentrates - Part 2Determination of sulfur content - The combustion neutralization titrimetric method
Standard published on 31.12.2012
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GB/T 8151.20-2012
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Methods for chemical analysis of zinc concentrates - Part 20Determination of copper,lead,iron,arsenic,cadmium antimony, calcium,magnesium contents - Inductively coupled plasma atomic emission spectrometry
Standard published on 31.12.2012
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GB/T 8151.21-2017
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Methods for chemical analysis of zinc concentrates—Part 21Determination of thallium content—Inductively coupled plasma mass spectrometry and inductively coupled plasma-atomic emission spectrometry
Standard published on 14.10.2017
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GB/T 8151.22-2020
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Methods for chemical analysis of zinc concentrates—Part 22: Determination of zinc, copper, lead,iron,aluminium,calcium and magnesium contents—Wavelength dispersive X-ray fluorescence spectrometric method
Standard published on 29.9.2020
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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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