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Preconcentration of Cobalt(II) Using Synergistic Extraction with Dithizone and Tributylphosphine Oxide

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Abstract

A simple preconcentration method for cobalt(ll) in natural waters based on synergistic extraction is proposed. Cobalt(ll) is extracted as the ternary complex, Co(ll)-dithizone-tributylphosphine oxide, from 300 cm3 of a water sample into 3 cm3 of carbon tetrachloride at pH 5. The method was applied to a river water sample. Using this method, cobalt(ll) in natural waters with levels below ώg dm-3 range could be determined by the atomic absorption spectrometry, an aliquot of the organic extract being injected into a graphite furnace.

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Authors and Affiliations

  1. Hokkaido Institute of Public Health, Kita-19, Nishi-12, Sapporo, 060, Japan

    Yasoo Itoh

  2. Department of Applied Chemistry, Faculty of Technology, Gunma University, Kiryu, 376, Japan

    Hiroshi Kawamoto & Hideo Akaiwa

Authors
  1. Yasoo Itoh
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  2. Hiroshi Kawamoto
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  3. Hideo Akaiwa
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Itoh, Y., Kawamoto, H. & Akaiwa, H. Preconcentration of Cobalt(II) Using Synergistic Extraction with Dithizone and Tributylphosphine Oxide. ANAL. SCI. 2, 43–46 (1986). https://doi.org/10.2116/analsci.2.43

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  • DOI: https://doi.org/10.2116/analsci.2.43

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