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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 4, Iss. 2 — Feb. 10, 2009

Sensing of Water Dissolved in Solvents Using a 5.629 μm Multimode Quantum Cascade Laser

A. Ouvrard, K. O'Dwyer, and B. D. MacCraith

Applied Spectroscopy, Vol. 62, Issue 12, pp. 1349-1353 (2008)


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Abstract

We report herein the detection of liquid water dissolved in a variety of solvents using a thermoelectrically cooled, pulsed, Fabry–Perot quantum cascade laser, operating at 5.629 μm at room temperature. The prototype sensor system consisted of the laser, a series of off-axis parabolic mirrors, and two mercury cadmium telluride detectors. When applied to the detection of water in tetrahydrofurane, a limit of detection of 0.85 parts per million was achieved. It is envisaged that such a sensor would be well suited to process control applications within the pharmaceuticals industry.

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Vol. 4, Iss. 2 Virtual Journal for Biomedical Optics

Citation
A. Ouvrard, K. O'Dwyer, and B. D. MacCraith, "Sensing of Water Dissolved in Solvents Using a 5.629 μm Multimode Quantum Cascade Laser," Appl. Spectrosc. 62, 1349-1353 (2008)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=as-62-12-1349

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