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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 tin-lead solders—Determination of silver content
WITHDRAWN published on 11.3.2003
Selected format:Tin-lead solders--Determination of silver content--Flame atomic absorption spectrophotometric method
WITHDRAWN published on 22.3.1989
Selected format:Methods for chemical analysis of tin-lead solders—Determination of zinc content
WITHDRAWN published on 11.3.2003
Selected format:Tin-lead solders--Determination of silver content--Potentiometric titrimetric method
WITHDRAWN published on 22.3.1989
Selected format:Methods for chemical analysis of tin-lead solders—Determination of aluminum content
WITHDRAWN published on 11.3.2003
Selected format:Lithium chloride anhydrous
WITHDRAWN published on 22.3.1989
Selected format:High purity lithium carbonate
WITHDRAWN published on 22.3.1989
Selected format:High-pure tantalum pentoxide
WITHDRAWN published on 22.3.1989
Selected format:High-pure niobium pentaoxide
WITHDRAWN published on 22.3.1989
Selected format:High-pure niobium pentoxide
WITHDRAWN published on 3.11.2003
Selected format:Latest update: 2026-04-28 (Number of items: 2 274 955)
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