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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 17 — Aug. 18, 2008
  • pp: 12435–12445

Elemental analysis using micro Laser-induced Breakdown Spectroscopy (µLIBS) in a microfluidic platform

Yogesh Godwal, Govind Kaigala, Viet Hoang, Siu-Lung Lui, Christopher Backhouse, Ying Tsui, and Robert Fedosejevs  »View Author Affiliations

Optics Express, Vol. 16, Issue 17, pp. 12435-12445 (2008)

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We present here a non-labeled, elemental analysis detection technique that is suitable for microfluidic chips, and demonstrate its applicability with the sensitive detection of sodium (Na). Spectroscopy performed on small volumes of liquids can be used to provide a true representation of the composition of the isolated fluid. Performing this using low power instrumentation integrated with a microfluidic platform makes it potentially feasible to develop a portable system. For this we present a simple approach to isolating minute amounts of fluid from bulk fluid within a microfluidic chip. The chip itself contains a patterned thin film resistive element that super-heats the sample in tens of microseconds, creating a micro-bubble that extrudes a micro-droplet from the microchip. For simplicity a non-valved microchip is used here as it is highly compatible to a continuous flow-based fluidic system suitable for continuous sampling of the fluid composition. We believe such a non-labeled detection technique within a microfluidic system has wide applicability in elemental analysis. This is the first demonstration of laser-induced breakdown spectroscopy (LIBS) as a detection technology in conjunction with microfluidics, and represents first steps towards realizing a portable lower power LIBS-based detection system.

© 2008 Optical Society of America

OCIS Codes
(140.3440) Lasers and laser optics : Laser-induced breakdown
(300.6210) Spectroscopy : Spectroscopy, atomic
(280.1545) Remote sensing and sensors : Chemical analysis

ToC Category:

Original Manuscript: May 13, 2008
Revised Manuscript: July 25, 2008
Manuscript Accepted: July 25, 2008
Published: August 4, 2008

Virtual Issues
Vol. 3, Iss. 10 Virtual Journal for Biomedical Optics

Yogesh Godwal, Govind Kaigala, Viet Hoang, Siu-Lung Lui, Christopher Backhouse, Ying Tsui, and Robert Fedosejevs, "Elemental analysis using micro Laser-induced Breakdown Spectroscopy (μLIBS) in a microfluidic platform," Opt. Express 16, 12435-12445 (2008)

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