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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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Real time, ultra low concentration detection of analytes in solution by infrared intracavity laser absorption

Elejalde Ochandiano, U. and Girkin, J.M. (2007) Real time, ultra low concentration detection of analytes in solution by infrared intracavity laser absorption. Applied Optics, 46 (19). pp. 3995-3999. ISSN 1559-128X

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Abstract

Two intracavity laser absorption techniques for ultralow concentration detection of chemicals in solution are compared. The first consists of a laser diode in a grating extended cavity, which produces a linear calibration curve for parts in 109 (ppb) concentrations corresponding to 17 nM. By replacing the grating with a highly reflective mirror, parts in 1012 (ppt) concentration detection is achieved, which corresponds to 340 pM. We report, to our knowledge for the first time, ppt detection of analyte concentration in liquid solution demonstrating good agreement between theory and experiment.