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      • ISO 5993:1979
      Codes & Standards - Purchase

      ISO 5993:1979

      Sodium hydroxide for industrial use -- Determination of mercury content -- Flameless atomic absorption spectrometric method

      SKU: iso_012187_104843 Published by ISO Publication Year 1979 1 Edition 6 pages

      Product Details

      • Overview
      Covers a method applicable to liquid or solid products having mercury contents greater than 0,02 mg/kg. The principle of determination is based on oxidation of the mercury contained in a test portion to mercury(II) ions by potassium permanganate in the presence of sulphuric acid, reduction of the excess oxidant by hydroxylammonium chloride, reduction of the mercury(II) ions to mercury by tin(II) chloride, entrainment of the mercury in air or nitrogen, passage of the gaseous mixture through a measuring cell, and measurement of the absorption at a wavelength of 253,7 nm.

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      GST REG No R119441681
      QST REG No R1006017360

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