AJAC  Vol.2 No.3 , July 2011
Imprinted Polymer Inclusion Membrane Based Potentiometric Sensor for Determination and Quantification of Diethyl Chlorophosphate in Natural Waters
Abstract: Biomimetic potentiometric sensor for the determination of diethyl chlorophosphate was developed using im- printed polymer inclusion membrane strategy. Semi-covalent imprinted and non-imprinted polymer particles were synthesized and found that non-imprinted polymer inclusion membrane was unstable in contrast to im- printed polymer inclusion membrane in determination and quantification of diethyl chlorophosphate. Im- printed polymer inclusion membrane based sensor found to be pH dependant with a 5 min equilibrium response time at pH = 10.5 and linearly responds to diethyl chlorophosphate in the concentration range of 1 × 10–9 to 1 × 10–4 and 1 × 10–4 to 1 × 10–1 mol●L–9 with a detection limit of 1 × 10–9 mol●L–1 (0.17 ppb). It was found that diethyl chlorophosphate response was selective against various selected interferents like pinacolyl methylphosphonate, dimethyl methyl phosphonate, methylphosphonic acid, Phorate and 2, 4-D. The devel- oped sensor was found to be stable for 3 months and can be reusable more than 30 times without loosing sensitivity. The developed sensor was successfully applied for the determination of diethyl chlorophosphate in natural waters.
Cite this paper: nullV. Vishnuvardhan, Y. Kalyan, K. Prathish, B. Gangadhar, Y. Tharakeswar, T. Rao and G. Naidu, "Imprinted Polymer Inclusion Membrane Based Potentiometric Sensor for Determination and Quantification of Diethyl Chlorophosphate in Natural Waters," American Journal of Analytical Chemistry, Vol. 2 No. 3, 2011, pp. 376-382. doi: 10.4236/ajac.2011.23046.

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