Journal
MICROCHIMICA ACTA
Volume 154, Issue 3-4, Pages 275-280Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-006-0518-9
Keywords
carmine; chemically modified electrode; parathion; voltammetry
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A voltammetric sensor for the determination of parathion has been developed based on the use of a poly(carmine) film electrode. The reduction of parathion at the poly(carmine) modified glassy carbon electrode (GCE) is studied by cyclic voltammetry (CV) and linear scan voltammetry (LSV). Parathion yields a well-defined reduction peak at a potential of -0.595 V on the poly(carmine) modified GCE in pH 6.0 phosphate buffer solution (PBS). Compared with that on a bare GCE, the reduction peak current of parathion is significantly enhanced. All the experimental parameters are optimized for the determination of parathion. The reduction peak current is linear with the parathion concentration in the range of 5.0 x 10(-8) to 1.0 x 10(-5) mol L-1, and the detection limit is 1.0 x 10(-8) mol L-1.
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