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Standards GB - Chinese national standards - Page 134
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 11730-2025
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Rural domestic water quantity
Standard published on 25.4.2025
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GB/T 11731-1989
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Standard method for hygienic examination of nitrobenzene in air of residential areas--Gas chromatography
Standard published on 21.9.1989
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GB/T 11732-1989
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Standard method for hygienic examination of pyridine in air of residential areas--Cyanogen chloride-barbituric acid spectrophotometric method
Standard published on 21.9.1989
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GB/T 11733-1989
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Standard method for hygienic examination of inorganic sulfate in air of residential areas--Ion chromatographly
Standard published on 21.9.1989
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GB/T 11734-1989
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Standard method for hygienic examination of methylparathion in air of residential areas--Gas chromatography
Standard published on 21.9.1989
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GB/T 11735-1989
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Standard method for hygienic examination of beryllium in air of residential areas--Morin fluorescence spectrophotometric method
Standard published on 21.9.1989
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GB/T 11736-1989
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Standard method for hygienic examination of chlorine in air of residential areas--Methyl orange spectrophotometric method
Standard published on 21.9.1989
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GB/T 11737-1989
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Standard method for hygienic examination of benzene,toluene and xylene in air of residential areas--Gas chromatography
Standard published on 21.9.1989
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GB/T 11738-1989
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Standard method for hygienic examination of methanol and acetone in air of residential areas--Gas chromatography
Standard published on 21.9.1989
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GB/T 11739-1989
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Standard method for hygienic examination of lead in air of residential areas--Atomic absorption spectrophotometry
Standard published on 21.9.1989
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