Incoherent broad-band cavity-enhanced absorption spectroscopy of liquids
Abstract
A new application of incoherent broad-band cavity enhanced absorption spectroscopy (IBBCEAS) to weak transitions in solution through a very straightforward modification of commercially available double-beam UV/VIS absorption spectrometers is reported. The improved sensitivity of the new approach is demonstrated on basis of the weak Franck-Condon inhibited absorption of the fifth C-H stretch overtone in liquid benzene. The theoretical limits of the enhancement of the signal-to-noise ratio of IBBCEAS in comparison with single pass absorption experiments are discussed for a set of given experimental cavity parameters. The optical loss properties of a typical transparent cuvette window in the cavity are also discussed.
- Publication:
-
Review of Scientific Instruments
- Pub Date:
- February 2005
- DOI:
- 10.1063/1.1841872
- Bibcode:
- 2005RScI...76b3107F
- Keywords:
-
- 07.60.Rd;
- 78.20.Ci;
- Visible and ultraviolet spectrometers;
- Optical constants