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Standards GB - Chinese national standards - Page 8788
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 8154.3-1987
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Methods for chemical analysis of cryolite natural and artificial--The distillation--thorium nitrate volumetric method for the determination of fluorine content
WITHDRAWN published on 1.1.1987
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GB 8154.4-1987
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Methods for chemical analysis of cryolite natural and artificial--The EDTA volumetric method for the determination of aluminium content
WITHDRAWN published on 1.1.1987
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GB 8154.5-1987
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Methods for chemical analysis of cryolite natural and artificial--The atomic absorption spectrophotometric method for the determination of sodium content
WITHDRAWN published on 1.1.1987
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GB 8154.6-1987
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Methods for chemical analysis of cryolite natural and artificial--The reduced molybdosilicate spectro photometric method for the determination of silica content
WITHDRAWN published on 1.1.1987
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GB 8154.7-1987
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Methods for chemical analysis of cryolite natural and artificial--The orthophenantholine spectro photometric method for the determination of iron content
WITHDRAWN published on 1.1.1987
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GB 8154.8-1987
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Methods for chemical analysis of cryolite natural and artificial--The barium sulphate gravimetric method for the determination of sulphate content
WITHDRAWN published on 1.1.1987
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GB 8154.9-1987
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Methods for chemical analysis of cryolite natural and artificial--Melybdphosphate blue spectrophotometric method for the determination of phosphorus content
WITHDRAWN published on 1.1.1987
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GB/T 8155-1987
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Preparation and storage of test samples of aluminium fluoride for industrial use
WITHDRAWN published on 27.5.1987
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GB/T 8156.1-1987
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Methods for chemical analysis of aluminium fluoride for industrial use--The gravimetric method for the determination of moisture content
WITHDRAWN published on 27.5.1987
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GB/T 8156.10-1987
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Aluminium fluoride for industrial use--Determination of sulphur content--X-ray fluorescence spectrometric method
WITHDRAWN published on 10.8.1987
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