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Standards GB - Chinese national standards - Page 5039
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 6150.3-2023
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Methods for chemical analysis of tungsten concentrates—Part 3: Determination of phosphorus content—The phosphorus molybdenum yellow spectrophotometry and inductively coupled plasma atomic emission spectrometry
Standard published on 27.11.2023
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GB/T 6150.4-2023
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Methods for chemical analysis of tungsten concentrates—Part 4Determination of sulfur content—High frequency-infrared absorption method and combustion-iodometric method
Standard published on 6.8.2023
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GB/T 6150.5-2008
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Methods for chemical analysis of tungsten concentrates - Determination of calcium content - EDTA volumetric method and flame atomic absorption spectrometric method
Standard published on 31.3.2008
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GB/T 6150.6-2023
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Methods for chemical analysis of tungsten concentrates—Part 6Determination of moisture content—Gravimetric method
Standard published on 6.8.2023
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GB/T 6150.7-2008
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Methods for chemical analysis of tungsten concentrates - Determination of tantalum content and niobium content - Inductively coupled plasma emission spectrometry and spectrophotometry
Standard published on 17.6.2008
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GB/T 6150.8-2023
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Methods for chemical analysis of tungsten concentrates—Part 8: Determination of molybdenum content—Thiocyante spectrophotometry method
Standard published on 6.8.2023
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GB/T 6150.9-2009
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Methods for chemical analysis of tungsten concentrates - Determination of copper content - Flame atomic absorption spectrometry
Standard published on 30.10.2009
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GB/T 6151-2016
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Textiles—Tests for colour fastness—General principles of testing
Standard published on 25.4.2016
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GB/T 6152-1997
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Textiles--Tests for colour fastness--Colour fastness to hot pressing
Standard published on 9.6.1997
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GB/T 6159.1-2014
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MicrographicsVocabularyPart 1: General terms
Standard published on 30.9.2014
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