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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
Methods for chemical analysis of magnesium and magnesium alloys—Part 20Determination of elements content—Inductively coupled plasma atomic emission spectrometric method
Standard published on 25.4.2024
Selected format:Chemical analysis methods of magnesium and magnesium alloys - Part 21: Determination of elements by photoelectric direct reading atomic emission spectrometry
Standard published on 15.4.2009
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Methods for chemical analysis of magnesium and magnesium alloys—Part 21: Determination of elements content—Photoelectric direct reading atomic emission spectrometric method
Execute Date: december 2026
Standard published on 25.5.2026
Selected format:Chemical analysis methods of magnesium and magnesium alloys - Part 22Determination of thorium content
Standard published on 27.11.2013
Selected format:
Methods for chemical analysis of magnesium and magnesium alloys—Part 22Determination of thorium content
Execute Date: december 2026
Standard published on 25.5.2026
Selected format:Methods for chemical analysis of magnesium and magnesium alloys—Part 23: Determination of elements content—Wavelength dispersive X-ray fluorescence spectrometric method
Standard published on 26.10.2024
Selected format:Methods for chemical analysis of magnesium and magnesium alloysPart 24: Determination of trace impurity elements contentsGlow discharge mass spectrometry
Standard published on 24.1.2025
Selected format:Chemical analysis methods of magnesium and magnesium alloys Determination of lithium content Flame atomic absorption spectrometric method
Standard published on 26.7.2005
Selected format:
Methods for chemical analysis of magnesium and magnesium alloys—Part 3Determination of lithium,silver content—Flame atomic absorption spectrometry method
Execute Date: december 2026
Standard published on 25.5.2026
Selected format:Chemical analysis methods of magnesium and magnesium alloys - Part 4Determination of manganese content - Periodate spectrophotometric method
Standard published on 6.9.2013
Selected format:Latest update: 2026-08-05 (Number of items: 2 291 440)
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