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Standards GB - Chinese national standards - Page 8445

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GB/T 6150.10-2008 WITHDRAWN

Methods for chemical analysis of tungsten concentrates—Determination of lead content—Flame atomic absorption spectrometric method

WITHDRAWN published on 31.3.2008

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GB/T 6150.11-1985 WITHDRAWN

Methods for chemical analysis of tungsten concentrates—The atomic absorption spectrophotometric method for the determination of copper content

WITHDRAWN published on 21.6.1985

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GB/T 6150.12-1985 WITHDRAWN

Methods for chemical analysis of tungsten concentrates—The hydrochloric acid-sodium chloride supporting electrolyte polarographic method for the determination of lead content

WITHDRAWN published on 21.6.1985

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GB/T 6150.12-2008 WITHDRAWN

Methods for chemical analysis of tungsten concentrates—Determination of silicon dioxide content—The silicomolybdenum blue spectrophotometry and the gravimetry

WITHDRAWN published on 17.6.2008

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GB/T 6150.13-1985 WITHDRAWN

Methods for chemical analysis of tungsten concentrates—The ammonium hydroxide-ammonium chloride supporting electrolyte polarographic method for the determination of zinc content

WITHDRAWN published on 21.6.1985

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GB/T 6150.13-2008 WITHDRAWN

Methods for chemical analysis of tungsten concentrates—Determination of arsenic content—Hydride reduction atomic absorption spectrometry and the silver diethyldithiocarbamate(DDTC-Ag) photometry

WITHDRAWN published on 17.6.2008

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