Direct Monitoring of Absorption in Solution by Cavity Ring-Down Spectroscopy

Cavity ring-down spectroscopy is applied to the liquid phase by placing the target solution directly into the optical cavity. We demonstrate that solutions in the cavity can be stirred and more importantly monitored in a flow. We report a minimum detectable absorption of 10-6 cm-1 for a range of org...

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Bibliographic Details
Published in:Analytical chemistry (Washington) 2002-04, Vol.74 (7), p.1741-1743
Main Authors: Hallock, Alexander J, Berman, Elena S. F, Zare, Richard N
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Exact sciences and technology
Spectrometric and optical methods
Spectrum analysis
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Summary:Cavity ring-down spectroscopy is applied to the liquid phase by placing the target solution directly into the optical cavity. We demonstrate that solutions in the cavity can be stirred and more importantly monitored in a flow. We report a minimum detectable absorption of 10-6 cm-1 for a range of organic solvents. This detection limit corresponds to picomolar concentrations for strong absorbers.
ISSN:0003-2700
1520-6882
DOI:10.1021/ac011103i