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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
General guide for EPMA quantitative analysis
WITHDRAWN published on 9.5.1994
Selected format:General guide of quantitative analysis by EPMA
WITHDRAWN published on 16.6.2008
Selected format:Method for testing EPMA instrument
WITHDRAWN published on 9.5.1994
Selected format:Methods for chemical analysis of tantalum and niobium—Determination of tantalum content in niobium
WITHDRAWN published on 9.5.1994
Selected format:Methods for chemical analysis of tantalum and niobium—Determination of iron, nickel, chromium, titanium, zirconium, aluminum and manganese contents in niobium
WITHDRAWN published on 9.5.1994
Selected format:Methods for chemical analysis of tantalum and niobium—Determination of arsenic antimonyleadtinand bismuth contents in niobium
WITHDRAWN published on 9.5.1994
Selected format:Methods for chemical analysis of tantalum and niobium—Determination of carbon content
WITHDRAWN published on 9.5.1994
Selected format:Methods for chemical analysis of tantalum and niobium—Determination of nitrogen content in tantalum
WITHDRAWN published on 9.5.1994
Selected format:Methods for chemical analysis of tantalum and niobium—Determination of oxygen content
WITHDRAWN published on 9.5.1994
Selected format:Methods for chemical analysis of tantalum and niobium—Determination of hydrogen content
WITHDRAWN published on 9.5.1994
Selected format:Latest update: 2026-01-23 (Number of items: 2 257 393)
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