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Standards GB - Chinese national standards - Page 8446
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 6730.45-2006
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Iron ores - Determination of arsenic content - Arseno-molybdenum blue spectrophotometric method after hydrogen arsenide separation
WITHDRAWN published on 1.11.2006
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GB/T 6730.46-1986
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Methods for chemical analysis of iron ores The extraction separation-molybdenum blue photometric method for the determination of arsenic content
WITHDRAWN published on 19.8.1986
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GB/T 6730.46-2006
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Iron ores - Determination of arsenic content - Arseno-molybdenum blue spectrophotometric method after the distillation separation
WITHDRAWN published on 1.11.2006
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GB/T 6730.47-1986
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Methods for chemical analysis of iron ores—The sulfochlorophenol S photometric method for the determination of niobium content
WITHDRAWN published on 19.8.1986
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GB/T 6730.48-1986
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Methods for chemical analysis of iron ores The dithio diantipyryl methane photometric method for the determination of bismuth content
WITHDRAWN published on 19.8.1986
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GB/T 6730.5-1986
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Methods for chemical analysis of iron ores The titanium chloride-potassium dichromate volumetric method for the determination of total iron content
WITHDRAWN published on 19.8.1986
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GB/T 6730.5-2007
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Iron ores—Determination of total iron content—Titanium()chloride reduction methods
WITHDRAWN published on 14.8.2007
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GB/T 6730.50-1986
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Methods for chemical analysis of iron ores The gas volumetric method for the determination of total carbon content
WITHDRAWN published on 19.8.1986
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GB/T 6730.51-1986
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Methods for chemical analysis of iron ores The caustic asbestos absorption gravimetric method for the determination of carbon content in carbonate
WITHDRAWN published on 19.8.1986
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GB/T 6730.52-2004
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Iron ores—Determination of cobalt content—Flame atomic absorption spectrometric method
WITHDRAWN published on 24.3.2004
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