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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
Manganese Ores - Determination of active oxygen content - Potassium dichromate titrimetric method
Standard published on 12.9.2006
Selected format:Dysprosium metal
Standard published on 31.3.2008
Selected format:Methods for chemical analysis of precious metal alloys—Part 1: Determination of gold content
Standard published on 29.8.2025
Selected format:Test method of precious metal alloys - Determination of nickel content for gold alloys - Complexometric backing titration using EDTA
Standard published on 31.3.2008
Selected format:Test method of precious metal alloys - Determination of gadolinium and beryllium contents for gold alloys - Inductively coupled plasma atomic emission spectrometry
Standard published on 31.3.2008
Selected format:Test method of precious metal alloys - Determination of nickel contents for silver alloys - Hydrogen peroxide spectrophotometry
Standard published on 31.3.2008
Selected format:Test method of precious metal alloys - Determination of tin, cerium and lanthanium contents for silver alloys - Inductively coupled clasma atomic emission spectrometry
Standard published on 31.3.2008
Selected format:Test method of precious metal alloys - Determination of aluminium and nickel contents for silver alloys - Inductively coupled plasma atomic emission spectrometry
Standard published on 31.3.2008
Selected format: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
Selected format: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
Selected format:Latest update: 2026-04-24 (Number of items: 2 274 650)
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