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Standards GB - Chinese national standards - Page 8665
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 7473-1987
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Water quality--Determination of copper--29-dimethy-110-phenanthroline spectrophotometric method
WITHDRAWN published on 6.3.1987
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GB/T 7474-1987
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Water quality--Determination of copper--Sodium diethyldithiocabamate spectrophotometric method
WITHDRAWN published on 6.3.1987
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GB/T 7478-1987
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Water quality--Determination of ammonium--Distillation and titration method
WITHDRAWN published on 6.3.1987
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GB/T 7479-1987
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Water quality--Determination of ammonium--Nessler’s reagent colorimetric method
WITHDRAWN published on 6.3.1987
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GB 748-1996
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Sulfate resistance portland cement
WITHDRAWN published on 15.5.1996
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GB/T 748-2005
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Sulfate resistance Portland cement
WITHDRAWN published on 22.4.2005
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GB/T 7481-1987
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Water quality--Determination of ammonium--Spectrophotometric method with salicylic acid
WITHDRAWN published on 6.3.1987
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GB/T 7482-1987
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Water quality--Determination of fluoride--Visual colorimetry with zirconium alizarinsulfonate
WITHDRAWN published on 6.3.1987
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GB/T 7483-1987
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Water quality--Determination of fluoride--Fluor reagent spectrophotometric
WITHDRAWN published on 6.3.1987
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GB/T 7486-1987
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Water quality--Determination of cyanide--Part 1:Determination of total cyanide
WITHDRAWN published on 6.3.1987
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