Electrochemical behaviour of EOP at the liquid/liquid interface and its determination |
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Authors: | Di J Gao X |
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Institution: | Department of Chemistry, Suzhou University, Suzhou 215006, PR China. |
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Abstract: | A new approach to the determination of emulsifier OP (EOP, a nonionic surfactant) is proposed, based on the voltammetry of the EOP facilitating Ca(2+) transfer across the water/nitrobenzene (w/nb) interface. The peaks obtained with cyclic voltammetry at the w/nb interface correspond to the transfer of the coordination complex ion Ca(EOP)](2+) from the aqueous to the nonaqueous phase. The calibration graph is linear in the range of 1.5x10(-5)-5x10(-4) mol l(-1). The ionic surfactants have a very minor effect on detection. |
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