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Standards GB - Chinese national standards - Page 7761
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 4324.17-1984
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Methods for chemical analysis of tungsten--The atomic absorption spectrophotometric method for the determination of sodium content
WITHDRAWN published on 12.4.1984
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GB/T 4324.18-1984
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Methods for chemical analysis of tungsten--The atomic absorption spectrophotometric method for the determination of potassium content
WITHDRAWN published on 12.4.1984
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GB/T 4324.19-1984
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Methods for chemical analysis of tungsten--The diantipyrylmethane photometric method for the determination of titanium content
WITHDRAWN published on 12.4.1984
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GB/T 4324.2-1984
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Methods for chemical analysis of tungsten--The potassium iodide-brucine photometric method for thedetermination of bismuth content
WITHDRAWN published on 12.4.1984
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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WITHDRAWN published on 31.12.2012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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