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A Study on Hexachromic Ion Selective Electrode Based on Supported Liquid Membranes

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Abstract

An ion selective electrode (ISE) for determining Cr(VI) using supported liquid membranes (SLMs) containing trioctylphosphine oxide (TOPO) was investigated in this study. TOPO, as a carrier, had a high selectivity for Cr(VI) against interfering ions such as sulfate, nitrate, nitrite, and chloride. The composition of the SLM was optimized as 0.193 g TOPO/1 mL NPOE (o-nitrophenyl octyl ether)/0.5 g poly (vinyl chloride) for detection of Cr(VI). The Cr(VI) concentration was measured in the range of1 × 10-3 to 1 × 10-6 M with the SLM prepared in the study. It seemed that Cr(VI) was transported in the SLM as a triply charged ion indicated by the slope of the emf response. Selectivity coefficients and detection limits of Cr(VI) in the presence of interfering ions were determined experimentally using the fixed interference method.

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Authors and Affiliations

  1. Department of Environmental Science and Engineering and Advanced Environmental Monitoring Research Center, Kwangju Institute of Science and Technology, 1 Oryong-dong, Puk-gu, Kwangju, Korea

    Young-Woo Choi

  2. Department of Environmental Science and Engineering and Advanced Environmental Monitoring Research Center, Kwangju Institute of Science and Technology, 1 Oryong-dong, Puk-gu, Kwangju, Korea

    Seung-Hyeon Moon

Authors
  1. Young-Woo Choi
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  2. Seung-Hyeon Moon
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Correspondence to Seung-Hyeon Moon.

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Choi, YW., Moon, SH. A Study on Hexachromic Ion Selective Electrode Based on Supported Liquid Membranes. Environ Monit Assess 70, 167–180 (2001). https://doi.org/10.1023/A:1010674414809

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  • DOI: https://doi.org/10.1023/A:1010674414809

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