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Standards GB - Chinese national standards - Page 6050
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 14506.17-1993
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Silicate rocks—Determination of strontium content—Flame atomic absorption spectrophotometric method
WITHDRAWN published on 19.6.1993
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GB/T 14506.18-1993
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Silicate rocks—Determination of copper
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GB/T 14506.19-1993
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Silicate rocks—Determination of lead
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GB/T 14506.2-1993
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Silicate rocks—Determination of combined water content—Gravimetric method
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GB/T 14506.20-1993
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Silicate rocks—Determination of zinc
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GB/T 14506.21-1993
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Silicate rocks—Determination of nickel and cobalt content—Ammonium hydroxide-ammonium chloride-sulfosalicylic acid-dimethyl glyoxime medium polarographic method
WITHDRAWN published on 19.6.1993
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GB/T 14506.22-1993
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Silicate rocks—Determination of vanadium
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GB/T 14506.23-1993
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Silicate rocks—Determination of chromium
WITHDRAWN published on 19.6.1993
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GB/T 14506.24-1993
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Silicate rocks—Determination of cadmium content—Hydrochloric acid-potassium iodide-tetraethyl ammonium bromide (iodide) medium polarographic method
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GB/T 14506.25-1993
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Silicate rocks—Determination of molybdenum and tungsten content—Sulfuric acid-phenylhydroxyacetic acid-cinchonine-potassium chlorate medium polarographic method
WITHDRAWN published on 19.6.1993
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