Standards GB - Chinese national standards - Page 5695

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

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GB/T 12390-1990 WITHDRAWN

Method for determination of thiamine ( vitamin B1 ) in foods

WITHDRAWN published on 19.3.1990

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GB/T 12391-1990 WITHDRAWN

Method for determination of riboflavin in foods

WITHDRAWN published on 19.3.1990

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GB/T 12392-1990 WITHDRAWN

Method for determination of total ascorbic acid in fruits, vegetables and derived products—Fluorometric method and colorimetric method 2.4-dinitrophenylhydrazine

WITHDRAWN published on 19.3.1990

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