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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 rare earth ferrosilicon alloy and rare earth ferrosilicon magnesium alloy—Determination of calcium, magnesium, and manganese contents
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of rare earth ferrosilicon alloy and rare earth ferrosilicon magnesium alloy—Determination of magnesia content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of rare earth ferrosilicon alloy and rare earth ferrosilicon magnesium alloy—Determination of silica content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of rare earth ferrosilicon alloy and rare earth ferrosilicon magnesium alloy—Determination of titanium content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of thorium nitrate—Insoluble substance in water
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of thorium nitrate—Determination of total rare earth content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of thorium nitrate—Determination of lead content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of thorium nitrate—Determination of thorium content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of thorium nitrate—Determination of sulphate content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of thorium nitrate—Determination of phosphorus content
WITHDRAWN published on 9.7.1996
Selected format:Latest update: 2025-09-16 (Number of items: 2 234 278)
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