Article ID Journal Published Year Pages File Type
1242849 Talanta 2010 5 Pages PDF
Abstract

A ultrasensitive, simple and convenient electrochemical method was firstly developed for the determination of prochloraz and its metabolites as 2,4,6-trichlorophenol (2,4,6-TCP) using nano-aperture medical stone. Compared with the undoped disposable electrode (UDE), nano-aperture medical stone doped disposable electrode (MSDDE) not only significantly enhances the oxidation peak current of 2,4,6-TCP but also lowers the oxidation overpotential, suggesting that the nano-aperture MSDDE can remarkably improve the sensitivity of 2,4,6-TCP. The experimental conditions such as pH values of buffer solution, the content of nano-aperture medical stone, accumulation potential and time were optimized for the determination of 2,4,6-TCP. At optimal conditions, the oxidation peak current is proportional to the concentration of 2,4,6-TCP over the range from 6.0 × 10−9 to 8.0 × 10−5 mol L−1. Finally, this novel method was successfully employed to detect prochloraz and its metabolites in orange rind with the detection limit of 8.4 × 10−10 mol L−1 (0.3 ng g−1) and the method was validated by gas chromatography.

Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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