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Standards GB - Chinese national standards - Page 522
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/Z 155-2025
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General principles of sodium ion battery cathode materials
Standard published on 3.12.2025
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GB/T 1550-2018
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Test methods for conductivity type of extrinsic semiconducting materials
Standard published on 28.12.2018
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GB/T 15501-1995
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Air quality--Determination of nitrobenzene(mononitro and dinitro-compound)--Reduction by zinc-N-(1-Naphthyl) ethylene diamine dihydrochloride spectrophotometric method
Standard published on 19.1.1995
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GB/T 15502-1995
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Air quality--Determination of aniline--N-(1-naphthyl)ethylene diamine dihydrochloride spectrophotometric method
Standard published on 19.1.1995
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GB/T 15503-1995
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Water quality--Determination of vanadium--BPHA extraction spectrophotometric method
Standard published on 19.1.1995
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GB/T 15504-1995
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Water quality--Determination of carbon disulfide--Diethylamine cupric acetate spectrophotometric method
Standard published on 19.1.1995
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GB/T 15505-1995
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Water quality--Determination of selenium--Graphite furnace atomic absorption spectrometric method
Standard published on 19.1.1995
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GB/T 15508-1995
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Acoustics--Speech articulation testing method
Standard published on 15.3.1995
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GB/T 1551-2021
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Test method for measuring resistivity of monocrystal silicon—In-line four-point probe and direct current two-point probe method
Standard published on 21.5.2021
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GB/T 15510-2008
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General rules for reliability test of electromagnetic relay for control circuits
Standard published on 18.6.2008
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