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Abstract: A parathion(PT) imprinted sensor was prepared on nano-TiO_(2) 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.
Template and target information: parathion, PT
Author keywords: molecular imprinted sensor, Parathion, Nano-TiO2, differential pulse voltammetry, liquid phase, deposition