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Standards GB - Chinese national standards - Page 488
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 15076.15-2008
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Methods for chemical analysis of tantalum and niobium - Determination of hydrogen content
Standard published on 31.3.2008
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GB/T 15076.16-2008
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Methods for chemical analysis of tantalum and niobium - Determination of sodium and potassium contents
Standard published on 31.3.2008
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GB/T 15076.2-2019
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Methods for chemical analysis of tantalum and niobium—Part 2:Determination of niobium content in tantalum—Inductively coupled plasma atomic emission spectrometry and stratography gravimetry
Standard published on 31.12.2019
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GB/T 15076.3-2019
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Methods for chemical analysis of tantalum and niobium—Part 3Determination of copper content—Flame atomic absorption spectrometry
Standard published on 4.6.2019
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GB/T 15076.4-2020
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Methods for chemical analysis of tantalum and niobium—Part 4:Determination of iron content—1,10-Phenanthroline spectrophotometry
Standard published on 6.3.2020
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GB/T 15076.5-2017
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Methods for chemical analysis of tantalum and niobium—Part5:Determination of molybdenum and tungsten contents—Inductively coupled plasma atomic emission spectrometry
Standard published on 14.10.2017
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GB/T 15076.6-2020
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Methods for chemical analysis of tantalum and niobium—Part 6:Determination of silicon content—Inductively coupled plasma atomic emission spectrometry
Standard published on 6.3.2020
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GB/T 15076.7-2020
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Methods for chemical analysis of tantalum and niobium—Part 7:Determination of phospherus content in niobium—4-Formyloxy-pentyl ketone-[2] extraction separation phosphomolybdate blue spectrophotometry and inductively coupled plasma atomic emission spectrometry
Standard published on 6.3.2020
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GB/T 15076.8-2008
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Methods for chemical analysis of tantalum and niobium - Determination of carbon and sulphur contents
Standard published on 31.3.2008
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GB/T 15076.9-2008
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Methods for chemical analysis of tantalum and niobium - Determination of iron, chromium, nickel, manganese, titanium, aluminum, copper, tin, lead and zirconium contents in tantalum
Standard published on 31.3.2008
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