Affordable Access

deepdyve-link
Publisher Website

Enhanced visual detection of pesticides using gold nanoparticles.

Authors
  • Lisha, Kinattukara Parambil
  • Pradeep, Thalappil
Type
Published Article
Journal
Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes
Publication Date
Sep 01, 2009
Volume
44
Issue
7
Pages
697–705
Identifiers
DOI: 10.1080/03601230903163814
PMID: 20183080
Source
Medline
License
Unknown

Abstract

The presence of parts per billion (ppb) levels of chlorpyrifos (O,O-Diethyl-O-(3,5,6-trichloro-2-pyridyl) phosphorothioate) and malathion (S-1,2-bis(ethoxycarbonyl) ethyl O,O-dimethyl phosphorodithioate), two common pesticides found in the surface waters of developing countries, have been visually detected using gold nanoparticles. Visual detection of the presence of pesticide is possible when the color change occurring by the adsorption of pesticides on gold nanoparticles is enhanced by sodium sulfate. The method presented here is simple and there is no need of sample preparation or preconcentration. The response occurs within seconds and the color change is very clear. The detection is possible if chlorpyrifos and malathion are present up to a concentration of 20 and 100 ppb, respectively. The method shows great potential for on-site pesticide monitoring. The method is also applicable as a qualitative technique for the performance evaluation of various household water filters, which claim pesticide removal.

Report this publication

Statistics

Seen <100 times