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Standards GB - Chinese national standards - Page 487
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 15072.8-2008
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Test method of precious metal alloys - Determination of copper content for gold, palladium and silver alloys - Complexometric return titration using thiourea releasing EDTA
Standard published on 31.3.2008
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GB/T 15072.9-2008
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Test method of precious metal alloys - Determination of indium content for gold alloys - Complexometric return titration using EDTA
Standard published on 31.3.2008
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GB/T 15073-2014
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Casting titanium and titanium alloys
Standard published on 3.9.2014
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GB/T 15074-2025
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General specification for EPMA quantitative analysis
Standard published on 28.3.2025
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GB/T 15076.1-2017
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Methods for chemical analysis of tantalum and niobium—Part 1: Determination of tantalum content in niobium—Inductively coupled plasma atomic emission spectrometry
Standard published on 14.10.2017
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GB/T 15076.10-2019
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Methods for chemical analysis of tantalum and niobium—Part 10:Determination of iron,nickel,chromium,titanium, zirconium,aluminum and manganese contents in niobium—Direct current arc atomic emission spectrometry
Standard published on 31.12.2019
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GB/T 15076.11-2020
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Methods for chemical analysis of tantalum and niobium—Part 11:Determination of arsenic,antimony,lead,tin and and bismuth contents in niobium—Direct current arc atomic emission spectrometry
Standard published on 6.3.2020
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GB/T 15076.12-2008
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Methods for chemical analysis of tantalum and niobium - Determination of phosphorus content in tantalum
Standard published on 31.3.2008
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GB/T 15076.13-2017
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Methods for chemical analysis of tantalum and niobium—Part 13: Determination of nitrogen content—Inert gas fusion thermal conductivity method
Standard published on 14.10.2017
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GB/T 15076.14-2008
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Methods for chemical analysis of tantalum and niobium - Determination of oxygen content
Standard published on 31.3.2008
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