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Standards GB - Chinese national standards - Page 495
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 15072.20-2025
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Methods for chemical analysis of precious metal alloys—Part 20: Determination of rhodium content
Standard published on 29.8.2025
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GB/T 15072.3-2025
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Methods for chemical analysis of precious metal alloysPart 3: Determination of platinum content
Standard published on 29.8.2025
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GB/T 15072.4-2008E
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Test method of precious metal alloys—Determination of palladium content for palladium and silver alloys—Butanedione dioxime gravimetry
Standard published on 31.3.2008
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GB/T 15072.4-2025
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Methods for chemical analysis of precious metal alloys—Part 4: Determination of palladium content
Standard published on 29.8.2025
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GB/T 15072.5-2008E
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Test method of precious metal alloys—Determination of silver content for gold and palladium alloys—Potentionmeter titration with potassium iodide
Standard published on 31.3.2008
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GB/T 15072.6-2025
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Methods for chemical analysis of precious metal alloys—Part 6: Determination of iridium content
Standard published on 29.8.2025
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GB/T 15072.7-2008
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Test methods of precious metal alloys - Determination of chromium and iron contents for gold alloys - Inductively coupled plasma atomic emission spectrometry
Standard published on 31.3.2008
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GB/T 15072.7-2008E
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Test method of precious metal alloys—Determination of chromium and iron contents for gold alloys—Inductively coupled plasma atomic emission spectrometry
Standard published on 31.3.2008
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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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