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Standards GB - Chinese national standards - Page 5124
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 6730.14-1986
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Methods for chemical analysis of iron ores The flame atomic absorption spectrophotometric method for the determination of calcium and magnesium content
Standard published on 19.8.1986
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GB/T 6730.14-2017
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Iron ores—Determination of calcium content—Flame atomic absorption spectrometric method
Standard published on 14.10.2017
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GB/T 6730.16-2016
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Iron ores—Determination of sulfur content—Barium sulfate gravimetric method
Standard published on 13.10.2016
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GB/T 6730.17-2014
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Iron oresDetermination of sulfur contentCombustion iodometric method
Standard published on 30.9.2014
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GB/T 6730.18-2006
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Iron ores - Determination of phosphorus content - Molybdenum blue spectrophotometric method
Standard published on 1.11.2006
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GB/T 6730.19-2016
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Iron ores—Determination of phosphorus content—Bismuth phosphomolybdate blue spectrophotometric method
Standard published on 13.12.2016
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GB/T 6730.2-2018
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Iron ores—Determination of moisture content—Gravimetric method
Standard published on 14.5.2018
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GB/T 6730.20-2016
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Iron ores—Determination of phosphorus content—Titrimetric method
Standard published on 13.10.2016
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GB/T 6730.21-2016
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Iron ores—Determination of manganse content—Potassium periodate spectrophotometric method
Standard published on 13.10.2016
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GB/T 6730.22-2016
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Iron ores—Determination of titanium content—Diantipyrylmethane spectrophotometric method
Standard published on 13.12.2016
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