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Reference type: Journal
Authors: Li SX, Liang RN, Qin W, Yao RQ
Article Title: Potentiometric Detection of Trace-Level Chlorpyrifos in Seawater Using a Polymeric Membrane Electrode Coupled with on-line Molecularly Imprinted Solid-Phase Extraction.
Publication date: 2015
Journal: International Journal of Electrochemical Science
Volume: 10
Page numbers: 1393-1403.
Alternative URL: http://electrochemsci.org/papers/vol10/100201393.pdf

Abstract: Potentiometric sensors have evolved to be a promising tool for environmental trace analysis and potentiometric biosensing. However, the applications of potentiometric sensors are restricted to measurements of samples without complex matrixes. A new potentiometric detection system for detection of trace-level chlorpyrifos (CPF) in real samples is described in this paper. By using on-line molecularly imprinted solid-phase extraction (MISPE), interferences from sample matrixes can be effectively eliminated. Numerous key variables including affecting the extraction recovery of MISPE have been optimized. The proposed detection system offers a low detection limit of 0.027 nmol L-1 and exhibits excellent selectivity over other organicphosphate pesticides such as parathion-methyl, phoxim and dipterex. The practical application of the proposed system has been carried out for detection of CPF at trace levels in real seawater samples.
Template and target information: chlorpyrifos, CPF
Author keywords: Sample matrix elimination, potentiometric sensor, Chlorpyrifos, molecularly imprinted solid-phase extraction, seawater


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