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Standards GB - Chinese national standards - Page 494
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 15072.14-2008E
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Methods for chemical analysis of precious metal alloys—Determination of aluminium and nickel contents in silver alloys—Inductively coupled plasma atomic emission spectrometry
Standard published on 31.3.2008
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GB/T 15072.15-2008
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Test method of precious metal alloys - Determination of nickel, zinc and manganese contents for gold, silver and palladium alloys - Inductively coupled plasma atomic emission spectrometry
Standard published on 31.3.2008
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GB/T 15072.15-2008E
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Test method of precious metal alloys—Determination of nickel,zinc and manganese contents for gold,silver and palladium alloys—Inductively coupled plasma atomic emission spectrometry
Standard published on 31.3.2008
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GB/T 15072.16-2008
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Test method of precious metal alloys - Determination of copper and manganese contents for gold alloys - Inductively coupled plasma atomic emission spectrometry
Standard published on 31.3.2008
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GB/T 15072.17-2008
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Test method of precious metal alloys - Determination of tungsten contents for platinum alloys - Tungstic acid gravimetry
Standard published on 31.3.2008
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GB/T 15072.17-2008E
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Test method of precious metal alloys—Determination of tungsten content for platinum alloys—Tungstic acid gravimetry
Standard published on 31.3.2008
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GB/T 15072.18-2008
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Test method of precious metal alloys - Determination of zirconium and gadolinium contents for gold alloys - Inductively coupled plasma atomic emission spectrometry
Standard published on 31.3.2008
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GB/T 15072.19-2008
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Test method of precious metal alloys - Determination of vanadium and magnesium contents for silver alloys - Inductively coupled plasma atomic emission spectrometry
Standard published on 31.3.2008
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GB/T 15072.2-2008E
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Test method of precious metal alloys—Determination of silver contents for silver alloys—Potentionmeter titration with sodium chloride
Standard published on 31.3.2008
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GB/T 15072.2-2025
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Method for chemical analysis of precious metal alloys—Part 2: Determination of silver content
Standard published on 29.8.2025
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