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Reference type: Journal
Authors: Vishnuvardhan V, Kalyan Y, Prathish KP, Gangadhar B, Tharakeswar Y, Rao TP, Naidu GR
Article Title: Imprinted Polymer Inclusion Membrane Based Potentiometric Sensor for Determination and Quantification of Diethyl Chlorophosphate in Natural Waters.
Publication date: 2011
Journal: American Journal of Analytical Chemistry
Volume: 2
Issue: (3)
Page numbers: 376-382.
DOI: 10.4236/ajac.2011.23046
Alternative URL: http://www.scirp.org/journal/ajac

Abstract: Biomimetic potentiometric sensor for the determination of diethyl chlorophosphate was developed using imprinted 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 imprinted polymer inclusion membrane in determination and quantification of diethyl chlorophosphate. Imprinted 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 10-2 mol.L-1 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 developed 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.
Template and target information: diethyl chlorophosphate
Author keywords: sensor, Imprinted polymer inclusion membrane, Potentiometry, Diethyl Chlorophosphate, natural waters


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