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Citation: WANG Cheng-Hang, LI Chun-Ya, XU Xiu-Ling, LI Ting, WANG Chang-Fa. Electrochemical Investigation of Parathion Imprinted Sensor and Its Application[J]. Chinese Journal of Applied Chemistry, ;2006, 23(4): 404-408. shu

Electrochemical Investigation of Parathion Imprinted Sensor and Its Application

1.
Department of Chemistry, Wuhan University, Wuhan 430072

Corresponding author: WANG Chang-Fa,
Received Date: 26 May 2005
Available Online: 6 August 2005

A parathion(PT) imprinted sensor was prepared on nano-TiO₂ thin film by the liquid phase deposition method with p-tert-butylcalix\arene as the functional monomer.The experimental results indicate that PT gives an irreversible reduction peak(E_p=-0.706 V) and a pair of reversible peaks(E_p=-0.067 2 V and-0.169 9 V) in phosphate buffer solution(pH=5.5).The oxidation peak current increases linearly with the increase of the concentration PT in the range of 5.0×10^-8 to 1.0×10^-5 mol/L(r=0.996 5).The detection limit is 1.0×10^-8 mol/L.The selectivity of the imprinted sensors was also studied.It was found that the current responses of some similar compounds of parathion were much smaller than that of parathion.This method was applied in the determination of PT in some vegetables and a good recovery of added PT in the vegetable samples was demonstrated.
- molecular imprinted sensor,
- parathion,
- nano-TiO₂,
- differential pulse voltammetry,
- liquid phase deposition
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