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Standards GB - Chinese national standards - Page 8800
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 6730.4-1986
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Methods for chemical analysis of iron ores The stannous chloride-mercuric chloride-potassium dichromate volumetric method for the determination of total iron content
WITHDRAWN published on 19.8.1986
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GB/T 6730.40-1986
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Methods for the chemical analysis of iron ores The polarography method for the determination of nickel content
WITHDRAWN published on 19.8.1986
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GB/T 6730.41-1986
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Methods for chemical analysis of iron ores The oscilloscopic polarography method for the determination of lead content
WITHDRAWN published on 19.8.1986
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GB/T 6730.42-1986
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Methods for chemical analysis of iron ores The dithizone photometric method for the determination of lead content
WITHDRAWN published on 19.8.1986
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GB/T 6730.43-1986
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Methods for the chemical analysis of iron ores The oscilloscopic polarography method for the determination of zinc content
WITHDRAWN published on 19.8.1986
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GB/T 6730.44-1986
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Methods for chemical analysis of iron ores The 1-(2-pyridylazo)-2-naphthol photometric method for the determination of zinc content
WITHDRAWN published on 19.8.1986
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GB/T 6730.45-1986
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Methods for chemical analysis of iron ores The diethyldithiocar bamic acid Ag salt photometric method for the determination of arsenic content
WITHDRAWN published on 19.8.1986
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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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