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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 chloride and carbonate—Determination of ignition loss content of rare earth carbonate
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of rare earth chloride and carbonate—Determination of total rare earth oxide contents
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of rare earth chloride and carbonate—Determination of europium oxide content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of rare earth chloride and carbonate—Determination of lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide, samarium oxide, europium oxide and yttrium content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of rare earth chloride and carbonate—Determination of thorium oxide content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of rare earth chloride and carbonate—Determination of barium oxide content in rare earth chloride
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of rare earth chloride and carbonate—Determination of calcium oxide content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of rare earth chloride and carbonate—Determination of magnesium oxide content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of rare earth chloride and carbonate—Determination of sodium oxide content
WITHDRAWN published on 9.7.1996
Selected format:Methods for chemical analysis of rare earth chloride and carbonate—Determination of nickel oxide content
WITHDRAWN published on 9.7.1996
Selected format:Latest update: 2025-11-09 (Number of items: 2 243 571)
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