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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
Sodium hydroxide for chemical fiber use
WITHDRAWN published on 31.3.1989
Selected format:Sodium hydroxide for chemical fiber use
WITHDRAWN published on 25.8.2003
Selected format:Sodium hydroxide for chemical fiber—Determination method of mass fraction
WITHDRAWN published on 31.3.1989
Selected format:Sodium hydroxide for chemical fiber use—Determination of sodium chloride content—Spectrometric method
WITHDRAWN published on 31.3.1989
Selected format:Sodium hydroxide for chemical fiber use--Determination of the calcium mass fraction--EDTA complexometric method
WITHDRAWN published on 31.3.1989
Selected format:Sodium hydroxide for chemical fiber use--Determination of silicon mass fraction--Reduced molybdo silicate spectrometric method
WITHDRAWN published on 31.3.1989
Selected format:Sodium hydroxide for chemical fiber use--Determination of sulphate mass fraction--Barium sulphategravimetric method
WITHDRAWN published on 31.3.1989
Selected format:Sodium hydroxide for chemical fiber use--Determination of sulphate mass fraction--Turbidimetric method
WITHDRAWN published on 31.3.1989
Selected format:Sodium hydroxido for chemical fiber use—Determination of copper mass fraction—Spectrometric method
WITHDRAWN published on 31.3.1989
Selected format:General requirements of quality assurance program for effluent and environmental radioactivity monitoring at nuclear facilities
WITHDRAWN published on 16.3.1989
Selected format:Latest update: 2026-01-25 (Number of items: 2 257 482)
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