Detection of Malathion, Fenthion and Methidathion by Using Heparin-Reduced Gold Nanoparticles
Authors: Park, Youmie; Im, A-Rang; Hong, Yoo Na; Kim, Chong-Kook; Kim, Yeong Shik
Source: Journal of Nanoscience and Nanotechnology, Volume 11, Number 9, September 2011 , pp. 7570-7578(9)
Publisher: American Scientific Publishers
Abstract:Green-synthesized gold nanoparticles were utilized for the detection of organophosphorous pesticides. Heparin, one of glycosaminoglycans, was used as a reducing and stabilizing agent. The reaction conditions were optimized, and high resolution-transmission electron microscopic images revealed gold nanoparticles of various shapes. Organophosphorous pesticides in water were detected by simply mixing them with gold nanoparticles. NaCl induced a color change in the mixed solution from wine-red to purple-blue that was dependent on the pesticide concentration in the range of 10-1,000 ppb. Gold nanoparticles were immobilized on a silica gel matrix in order to prepare solid supports for removing pesticides. The incorporation of atomic gold and heparin bound to 2 g of silica gel was determined 4,058 ppm and 33 μg as measured by inductively coupled plasma-atomic emission spectrophotometry and carbazole assay, respectively. AuNPs-immobilized silica gel columns were successfully applied for removing fenthion in water confirmed by RP-HPLC and FT-IR analyses.
Document Type: Research article
Publication date: 2011-09-01
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