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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
Sponge titanium, titanium and titanium alloys—Determination of aluminum content—Separation with sodium hydroxide-EDTA complexometric titration method
WITHDRAWN published on 4.11.1996
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WITHDRAWN published on 1.1.1984
Selected format:Sponge titanium, titanium and titanium alloys—Determination of tin content—Potassium iodate titration method
WITHDRAWN published on 4.11.1996
Selected format:Methods for chemical analysis of silicochromium--The gravimetric method for the determination of silicon content
WITHDRAWN published on 28.9.1984
Selected format:Methods for chemical analysis of silicochromium--The alkaline fusion-ammonium persulfate oxidation volumetric method for the determination of chromium content
WITHDRAWN published on 4.10.1984
Selected format:Methods for chemical analysisof silicochromium--The molybdenum blue photometric method for the determination of phosphorus content
WITHDRAWN published on 4.10.1984
Selected format:Methods for chemical analysis of silicochromium—The infrared absorption method for the determination of carbon content
WITHDRAWN published on 21.2.1988
Selected format:Methods for chemical analysis of silicochromium--The coulometric method for the determination of carbon content
WITHDRAWN published on 1.1.1988
Selected format:Methods for chemical analysis of silicochromium—The infrared absorption method for the determination of sulfur content
WITHDRAWN published on 21.2.1988
Selected format:Methods for chemical analysis of silicochromium—The combustion-neutralization titration method for the determination of sulfur content
WITHDRAWN published on 21.2.1988
Selected format:Latest update: 2025-12-16 (Number of items: 2 252 193)
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