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

Donghoon Lee, Sangyeop Lee, Gi Hun Seong, Jaebum Choo, Eun Kyu Lee, Dae Gab Gweon, Sang Hoon Lee

Research output: Contribution to journalArticle

105 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)373-377
Number of pages5
JournalApplied Spectroscopy
Volume60
Issue number4
DOIs
Publication statusPublished - 2006 Apr 1

Fingerprint

Methyl Parathion
pesticides
Microfluidics
Raman Spectrum Analysis
Polydimethylsiloxane
Pesticides
quantitative analysis
Raman spectroscopy
Chemical analysis
Alligators and Crocodiles
Trace analysis
Advection
Feasibility Studies
teeth
advection
Silver
Nanoparticles
Limit of Detection
baysilon
Tooth

Keywords

  • Confocal microscopy
  • Microfluidic channel
  • PDMS
  • Pesticide detection
  • Polydimethylsiloxane
  • SERS
  • Surface-enhanced Raman spectroscopy

ASJC Scopus subject areas

  • Spectroscopy
  • Instrumentation

Cite this

Quantitative analysis of methyl parathion pesticides in a polydimethylsiloxane microfluidic channel using confocal surface-enhanced Raman spectroscopy. / Lee, Donghoon; Lee, Sangyeop; Seong, Gi Hun; Choo, Jaebum; Lee, Eun Kyu; Gweon, Dae Gab; Lee, Sang Hoon.

In: Applied Spectroscopy, Vol. 60, No. 4, 01.04.2006, p. 373-377.

Research output: Contribution to journalArticle

Lee, Donghoon ; Lee, Sangyeop ; Seong, Gi Hun ; Choo, Jaebum ; Lee, Eun Kyu ; Gweon, Dae Gab ; Lee, Sang Hoon. / Quantitative analysis of methyl parathion pesticides in a polydimethylsiloxane microfluidic channel using confocal surface-enhanced Raman spectroscopy. In: Applied Spectroscopy. 2006 ; Vol. 60, No. 4. pp. 373-377.
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