Direct determination of pentachlorophenol by differential pulse polarography |
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| Authors: | Albert L Wade Fred M Hawkridge Howard P Williams |
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| Institution: | Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284 U.S.A.;Department of Chemistry, University of Southern Mississippi, Hattiesburg, Mississippi 39401 U.S.A. |
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| Abstract: | Differential pulse polarography at the dropping mercury electrode and differential pulse voltammetry at the carbon paste electrode are used for direct determinations of pentachlorophenol at concentrations down to 0.27 ppm. PCP is electrochemically reduced in phosphate buffers of pH 8 to produce a concentration-dependent current peak at —0.8 V vs. Ag/AgCl. The procedure requires only 15 min. Cyclic voltammetry at the hanging mercury drop electrode is used to evaluate the electrochemical reaction and to establish the reversibility of the PCP electrode reaction. |
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