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Standards GB - Chinese national standards - Page 895
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 1819.1-2022
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Methods for chemical analysis of tin concentrates—Part 1Determination of moisture content—Heat drying method
Standard published on 9.3.2022
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GB/T 1819.10-2017
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Methods for chemical analysis of tin concentrates—Part 10: Determination of sulfur content—High frequency combustion with infrared absorption method and potassium iodate titrimetric method
Standard published on 29.9.2017
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GB/T 1819.11-2017
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Methods for chemical analysis of tin concentrates—Part 11Determination of aluminium oxide content—Chromazuzal S spectrophotometric method
Standard published on 29.9.2017
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GB/T 1819.12-2017
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Methods for chemical analysis of tin concentrates—Part 12:Determination of silicon dioxide content—The silicomolybdenum blue spectrophotometry and sodium hydroxide titration
Standard published on 29.9.2017
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GB/T 1819.13-2017
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Methods for chemical analysis of tin concentrates—Part 13: Determination of magnesium oxide content,calcium oxide content—Flame atomic absorption spectrometric method
Standard published on 29.9.2017
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GB/T 1819.14-2017
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Methods for chemical analysis of tin concentrates—Part 14Determination of copper content—Flame atomic absorption spectrometry
Standard published on 29.9.2017
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GB/T 1819.15-2017
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Methods for chemical analysis of tin concentrates—Part 15Determination of fluorine content—The ion-selective electrode method
Standard published on 29.9.2017
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GB/T 1819.16-2017
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Methods for chemical analysis of tin concentrats—Part 16:Determination of siliver content—Flame atomic absorption spectrometry
Standard published on 29.9.2017
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GB/T 1819.17-2017
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Methods for chemical analysis of tin concentrates—Part 17Determination of mercury content—Atomic fluorescence spectrometric method
Standard published on 29.9.2017
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GB/T 1819.2-2004
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Methods for chemical analysis of tin concentrates--Determination of tin content--The potassium iodate titrimetric method
Standard published on 5.2.2004
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