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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
The determination of available phosphous content for slurry concentration process monoammonium phosphate
WITHDRAWN published on 1.1.1988
Selected format:The determination of total nitrogen content for monoammonium phosphate and diammonium phosphate--Titrimetric method after distillation
WITHDRAWN published on 1.1.1988
Selected format:Determination of total nitrogen content for monoammonium phosphate and diammonium phosphate Titrimetric method after distillation
WITHDRAWN published on 26.7.2001
Selected format:Determination of available phosphous content for monoammonium phosphate and diammonium phosphate
WITHDRAWN published on 26.7.2001
Selected format:Determination of water content for monoammonium phosphate and diammonium phosphate
WITHDRAWN published on 26.7.2001
Selected format:Determination of particle size for monoammonium phosphate and diammonium phosphate
WITHDRAWN published on 26.7.2001
Selected format:Lock washers with angular upturn tab perpendicular to the lug
WITHDRAWN published on 13.10.1976
Selected format:The determination of water content for monoammonium phosphate and diammonium phosphate
WITHDRAWN published on 1.1.1988
Selected format:The determination of particle size for monoammonium phosphate and diammonium phosphate
WITHDRAWN published on 1.1.1988
Selected format:Determination of granula average crushing strength for monoammonium phosphate and diammonium phosphate
WITHDRAWN published on 22.2.1989
Selected format:Latest update: 2026-04-10 (Number of items: 2 271 455)
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