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Standards GB - Chinese national standards - Page 4257
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 4325.17-2013
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Methods for chemical analysis of molybdenum - Part 17: Determination of titanium content - Diantipyrylmethane spectrophotometry and inductively coupled plasma atomic emission spectrometry
Standard published on 9.5.2013
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GB/T 4325.18-2013
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Methods for chemical analysis of molybdenum - Part 18: Determination of vanadium content - N-benzoyl-N-phenylhydroxylamine spectrophotometry and inductively coupled plasma atomic emission spectrometry
Standard published on 9.5.2013
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GB/T 4325.19-2013
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Methods for chemical analysis of molybdenum - Part 19: Determination of chromium content - Diphenylcarbazide spectrophotometry
Standard published on 9.5.2013
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GB/T 4325.2-2013
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Methods for chemical analysis of molybdenum - Part 2: Determination of cadmium content - Flame atomic absorption spectrometry
Standard published on 9.5.2013
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GB/T 4325.20-2013
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Methods for chemical analysis of molybdenum - Part 20: Determination of manganese content - Flame atomic absorption spectrometry
Standard published on 9.5.2013
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GB/T 4325.21-2013
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Methods for chemical analysis of molybdenum - Part 21: Determination of carbon content and sulfur content - High frequency combustion-infrared absorption method
Standard published on 9.5.2013
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GB/T 4325.22-2013
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Methods for chemical analysis of molybdenum - Part 22Determination of phosphorus content - Molybdenum blue spectrophotometry
Standard published on 9.5.2013
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GB/T 4325.23-2013
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Methods for chemical analysis of molybdenum - Part 23: Determination of oxygen and nitrogen contents - Inert gas fusion-infrared absorption and thermal conductivity method
Standard published on 9.5.2013
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GB/T 4325.24-2013
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Methods for chemical analysis of molybdenum - Part 24: Determination of tungsten content - Inductively coupled plasma atomic emission spectrometry
Standard published on 9.5.2013
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GB/T 4325.25-2013
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Methods for chemical analysis of molybdenum - Part 25: Determination of hydrogen content - Intert gas fusion infrared absorption method/thermal conductivity method
Standard published on 9.5.2013
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