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Quantitative analysis of methyl parathion pesticides in a polydimethylsiloxane microfluidic channel using confocal surface-enhanced Raman spectroscopy

Authors
Lee, DonghoonLee, SangyeopSeong,Gi-hoonChoo, JaebumLee,EungyoGweon, Dae-GapLee, Sanghoon
Issue Date
Apr-2006
Publisher
SAGE PUBLICATIONS INC
Keywords
surface-enhanced Raman spectroscopy; SERS; confocal microscopy; microfluidic channel; pesticide detection; polydimethylsiloxane; PDMS
Citation
APPLIED SPECTROSCOPY, v.60, no.4, pp 373 - 377
Pages
5
Indexed
SCIE
SCOPUS
Journal Title
APPLIED SPECTROSCOPY
Volume
60
Number
4
Start Page
373
End Page
377
URI
https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/44983
DOI
10.1366/000370206776593762
ISSN
0003-7028
1943-3530
Abstract
A fast and ultra-sensitive trace analysis of methyl parathion pesticides in a polydimethylsiloxane (PDMS) microfluidic channel was investigated using confocal surface-enhanced Raman spectroscopy (SERS). A three-dimensional PDMS-based passive micromixer was fabricated for this purpose. This PDMS micromixer showed a high mixing efficiency because a strong chaotic advection was developed by the simultaneous vertical and transverse dispersion of the confluent streams. The confocal SERS signal was measured after methyl parathion pesticides were effectively adsorbed onto silver nanoparticles while flowing along the upper and lower alligator-teeth-shaped PDMS channel. A quantitative analysis of the methyl parathion pesticides was performed based on the measured peak height at 1246 cm(-1). Our method has a detection limit of 0.1 ppm. This value satisfies the requirement recommended by the Collaborative International Pesticides Analytical Council (CIPAC) for the determination of methyl parathion in pesticide formulations. This study demonstrates the feasibility of using confocal SERS for the highly sensitive detection of methyl parathion pesticides in a PDMS microfluidic channel.
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ERICA 공학대학 (DEPARTMENT OF BIONANO ENGINEERING)
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