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Standards GB - Chinese national standards - Page 322
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 13747.8-2017
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Methods for chemical analysis of zirconium and zirconium alloys—Part 8Determination of cobalt content—Nitroso-R-salt spectrophotometry
Standard published on 29.9.2017
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GB/T 13747.9-2022
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Methods for chemical analysis of zirconium and zirconium alloys—Part 9Determination of magnesium content—Flame atomic absorption spectrometry and inductively coupled plasma atomic emission spectrometry
Standard published on 12.10.2022
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GB/T 13748.1-2013
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Chemical analysis methods of magnesium and magnesium alloys - Part 1Determination of aluminium content
Standard published on 6.9.2013
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GB/T 13748.10-2013
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Chemical analysis methods of magnesium and magnesium alloys - Part 10Determination of silicon content - Molybdenum blue spectrophotometric method
Standard published on 6.9.2013
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GB/T 13748.11-2005
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Chemical analysis methods of magnesium and magnesium alloys Determination of beryllium content Solochrome cyanine R spectrophotometric method
Standard published on 26.7.2005
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GB/T 13748.12-2013
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Chemical analysis methods of magnesium and magnesium alloys - Part 12Determination of copper content
Standard published on 27.11.2013
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GB/T 13748.13-2005
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Chemical analysis methods of magnesium and magnesium alloys Determination of lead content Flame atomic absorption spectrophotometric method
Standard published on 26.7.2005
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GB/T 13748.14-2013
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Chemical analysis methods of magnesium and magnesium alloys - Part 14Determination of nickel content - Dimethylglyoxime trophotometric method
Standard published on 27.11.2013
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GB/T 13748.15-2013
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Chemical analysis methods of magnesium and magnesium alloys - Part 15Determination of zinc content
Standard published on 27.11.2013
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GB/T 13748.16-2005
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Chemical analysis methods of magnesium and magnesium alloys Determination of calcium content Flame atomic absorption spectrometric method
Standard published on 26.7.2005
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