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Standards GB - Chinese national standards - Page 7610
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 8156.8-1987
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Methods for chemical analysis of aluminium fluoride for industrial use--The barium sulphate gravimetric method for the determination of sulphate content
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GB/T 8156.9-1987
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Methods for chemical analysis of aluminium fluoride for industrial use--The molybdenum blue photometric method for the determination of phosphorus content
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GB/T 8157-1987
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Preparation and storage of test samples of sodium fluoride
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GB/T 8158.1-1987
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Methods for chemical analysis of sodium fluoride--The gravimetric method for the determination of moisture content
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GB/T 8158.2-1987
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Methods for chemical analysis of sodium fluoride--The distillation-nitric thorium volumetric method for the determination of fluorine content
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GB/T 8158.3-1987
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Methods for chemical analysis of sodium fluoride--The molybdenum blue photometric method for the determination of silica content
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GB/T 8158.4-1987
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Methods for chemical analysis of sodium fluoride--The 110-phenanthroline spectrophotometric method forthe determination of iron content
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GB/T 8158.5-1987
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Methods for chemical analysis of sodium fluoride--The turbidimetric method for the determination of soluble sulphates content
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GB/T 8158.6-1987
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Methods for chemical analysis of sodium fluoride--The gravimetric method for the determination of carbonate content
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GB/T 8158.7-1987
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Methods for chemical analysis of sodium fluoride--The neutral titration for the determination of acidity
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