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Standards GB - Chinese national standards - Page 5262
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 6730.47-2017
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Iron ores—Determination of niobium content—Sulfochlorophenol S spectrophotometric method
Standard published on 7.9.2017
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GB/T 6730.47-2017E
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Iron ores—Determination of niobium content—Sulfochlorophenol S spectrophotometric method
Standard published on 7.9.2017
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GB/T 6730.48-2021
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Iron ores—Determination of bismuth content— Dithiodiantipyryl methane spectrophotometric method
Standard published on 31.12.2021
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GB/T 6730.49-1986
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Methods for chemical analysis of iron ores The flame atomic absorbtion spectrophotometric method for the determination of sodium and potassium content
Standard published on 19.8.1986
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GB/T 6730.49-2017
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Iron ores—Determination of potassium content—Flame atomic absorption spectrometric method
Standard published on 14.10.2017
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GB/T 6730.5-2022
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Iron ores—Determination of total iron content—Titrimetric methods after titanium(III) chloride reduction
Standard published on 15.4.2022
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GB/T 6730.50-2016
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Iron ores—Determination of carbon content—Gas volumetric method
Standard published on 30.12.2016
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GB/T 6730.51-2023
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Iron ores—Determination of carbon content in carbonate—The caustic asbestos absorption gravimetric method
Standard published on 23.5.2023
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GB/T 6730.52-2018
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Iron ores—Determination of cobalt content—Flame atomic absorption spectrometric method
Standard published on 14.5.2018
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GB/T 6730.53-2004
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Iron ores--Determination of zinc content--Flame atomic absorption spectrometric method
Standard published on 24.3.2004
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