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Standards GB - Chinese national standards - Page 7610
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 4324.2-2012
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Methods for chemical analysis of tungsten—Part 2:Determination of bismuth content—Hydrogenate atomic absorption spectrometry
WITHDRAWN published on 31.12.2012
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GB/T 4324.20-1984
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Methods for chemical analysis of tungsten—The N-benzoyl-N-phenylhydroxylamine photometric method for the determination of vanadium content
WITHDRAWN published on 12.4.1984
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GB/T 4324.21-1984
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Methods for chemical analysis of tungsten--The diphenylcarbazide photometric method for the determination of chromium content
WITHDRAWN published on 12.4.1984
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GB/T 4324.22-1984
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Methods for chemical analysisof tungsten--The formaldoxime photometric method for manganese content
WITHDRAWN published on 12.4.1984
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GB/T 4324.23-1984
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Methods for chemical analysis of tungsten--The combustion-conductometric titration method for the determination of suphur content
WITHDRAWN published on 12.4.1984
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GB/T 4324.24-1984
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Methods for chemical analysis of tungsten--The berylium as carrier precipitation agent-molybdenum blue photometric method for the determination of phosphorus content
WITHDRAWN published on 12.4.1984
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GB/T 4324.25-1984
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Methods for chemical analysis of tungsten--The inert gas fusion-coulometric titration method for the determination of oxygen content
WITHDRAWN published on 12.4.1984
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GB/T 4324.26-1984
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Methods for chemical analysis of tungsten--The Nessler reagent photometric method for the determination of nitrogen content
WITHDRAWN published on 12.4.1984
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GB/T 4324.27-1984
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Methods for chemical analysisof tungsten--The combustion-coulometric titration method for the determinationof carbon content
WITHDRAWN published on 12.4.1984
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GB/T 4324.28-1984
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Methods for chemical analysis of tungsten--The thiocy anate photometric method for the determin-ation of molybdenum content
WITHDRAWN published on 12.4.1984
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