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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
Water quality--Determination of nitrate--Spectrophotometric method with phenol disulfonic acid
Standard published on 6.3.1987
Selected format:Water quality--Determination of fluoride--Ion selective electrode method
Standard published on 6.3.1987
Selected format:Water quality--Determination of total arsenic--Silver diethyldithiocarbamate spectrophotometricmethod
Standard published on 6.3.1987
Selected format:Water quality--Determination of dissolved oxygen--Iodometric method
Standard published on 6.3.1987
Selected format:Test method for determining capability of resisting sulfate corrode of cement
Standard published on 30.6.2008
Selected format:Water quality--Determination ofBHC and DDT--Gas chromatography
Standard published on 6.3.1987
Selected format:Water quality--Determination of nitrogen(nitrite)--Spectrophotometric method
Standard published on 6.3.1987
Selected format:Water quality--Determination of anionic surfactants--Methylene blue spectrophotometric method
Standard published on 6.3.1987
Selected format:The protecting distance betweenoverhead power line and receiving station of AM broadcasting
Standard published on 24.3.1987
Selected format:Microprocessor system bus - 8-bit and 16-bit data (MULTIBUS ) - Part 1: Functional description with electrical and timing specifications
Standard published on 6.8.2008
Selected format:Latest update: 2026-06-10 (Number of items: 2 281 585)
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