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  • Chem Sci Trans., 2014, 3(1),  pp 255-267  

    DOI:10.7598/cst2014.505

    Research Article

    A New Approach for Extraction and Determination of Manganese in Environmental Samples Using Cloud-Point Extraction Coupled with Spectrophotometry

  • ZUHAIR A A KHAMMAS, SHAWKAT K. JAWAD and IBTEHAJ R.ALI
  • Department of Chemistry, College of Science for Women, University of Baghdad, Jadiryiah, Baghdad, Iraq
    Department of Chemistry, College of Education for women, University of Kufa, Kufa. Najaf, Iraq
  • Abstract

    A new and versatile procedure for the spectrophotometric determination of manganese using micelle-mediated extraction was developed. The method involved the formation of an ion association complex between manganese oxyanion (MnO4-) and brilliant green in acidic solution and the complex was extracted into the surfactant Triton X-100 at optimum conditions. The surfactant-rich phase which contains manganese complex was mediated with solvent and the Mn content measured spectrophotometerically at absorption maximum (λmax = 657 nm). The effects of the several variables which impact the CPE efficiency were optimized by one-factor-at-a-time (OFAT). Under the optimized conditions, enrichment factor of 282 was achieved leading to limit of detection and limit of quantitation of 0.086 and 0.242 μg μL-1 respectively, with linearity of 0.2-3 μg mL-1. The precision (RSD%) of the proposed method was of 1.07% . The interferences effect of such ions was also studied. This method is applicable in the determination of manganese in environmental and vital samples.

    Keywords

    Manganese oxyanion, Brilliant green, Cloud-point extraction, Spectrophotometry

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