Journal
MICROCHIMICA ACTA
Volume 165, Issue 3-4, Pages 307-311Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-008-0134-y
Keywords
Carbon nanotubes; Gold nanoparticles; Organophosphate pesticides
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Funding
- National Natural Science Foundation of China [20247002]
- National Basic Research (973) Program [2005CB724201]
- Ministry of Science and Technology of China, Beijing Natural Science Foundation [8062010]
- Beijing Municipal Education Commission Scientific and Technological [Km200310005008]
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An electrochemical sensor was developed for the detection of organophosphate pesticides based on electrodeposition of gold nanoparticles on a multi-walled carbon nanotubes modified glassy carbon electrode. Cyclic voltammetry was employed in the process of electrodeposition. Field emission scanning electron microscope and X-ray diffraction techniques were used for characterization of the composite. Organophosphate pesticides (e.g. parathion) were determined using linear scan voltammetry. A highly linear response to parathion in the concentration range from 6.0 x 10(-5) to 5.0 x 10(-7) M was observed, with a detection limit of 1.0 x 10(-7) M estimated at a signal-to-noise ratio of 3. The method has been applied to the analysis of parathion in real samples.
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