GB - Chinese national standards

Iron ores—Preparation and certification of certified reference materials for use in chemical analysis

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Iron ores—Determination of radionuclides—Inductively coupled plasma-mass spectrometric method

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Iron ores—Determination of total iron and other multi-element content—Wavelength dispersive X-ray fluorescence spectrometry (cobalt internal standard method)

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Iron ores—Determination of chlorine content—X-ray fluorescence spectrometric method

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Iron ores—Determination of thorium content—Arsenazo spectrophotometric method

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Iron ores—Determination of silicon content—The silicomolybdic blue spectrophotometric method reduced by ammonium ferrous sulfate

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Iron ores—Determination of gold, silver, platinum, palladium contents—Inductively coupled plasma mass spectrometry method

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Vaseline for capacitor

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Paints and varnishes—Determination of film hardness by pencil test

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Chemical reagent—Cupric oxide powder

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