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Radiochemical studies on the extraction of arsenic(III) by trilaurylamine oxide and benzene from aqueous iodide solutions and its determination in water samples by spectrophotometry

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Abstract

An extraction system consisting of trilaurylamine N-oxide and benzene has been identified as a possible extractant for tracer arsenic (<10−3 M) from hydrochloric or sulfuric acid solutions with or without iodide. Benzene alone is less efficient as an extractant for arsenic when compared with trilaurylamine oxide dissolved in benzene. The mechanism of extraction is attributed to the formation of hydrated AsCl3, while the iodide complex is most probably AsI −4 . The role of the solvent and the other parameters affecting the extraction have been investigated. The results have been employed to determine arsenic in water samples by spectrophotometry using the molybdenum blue method. The extraction procedure was used for the analysis of 10 ml water samples containing 0.2–0.5 μg of arsenic.

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Authors and Affiliations

  1. Department of Chemistry, University of Petroleum and Minerals, 31 261, Dhahran, (Saudi Arabia)

    M. Rashid & A. Bari

  2. Department of Chemistry, College of Science, King Abdul Aziz University, P.O. Box 9028, Jeddah, (Saudi Arabia)

    M. Ejaz

Authors
  1. M. Rashid
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  2. A. Bari
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  3. M. Ejaz
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Rashid, M., Bari, A. & Ejaz, M. Radiochemical studies on the extraction of arsenic(III) by trilaurylamine oxide and benzene from aqueous iodide solutions and its determination in water samples by spectrophotometry. Journal of Radioanalytical and Nuclear Chemistry, Articles 157, 193–202 (1992). https://doi.org/10.1007/BF02039791

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  • DOI: https://doi.org/10.1007/BF02039791

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