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Comparison of Calculated Detection Limits in Molecular Absorption, Molecular Luminescence, Raman, Molecular Ionization, and Photothermal Spectrometry

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Abstract:

Detection limits for absorption, luminescence, photoionization, Raman, and photothermal molecular spectrometric methods are calculated from signal-to-noise expressions. The detection limits (in m−3) represent the best possible values by the various methods, since the limiting noises in each case were chosen. Molecular luminescence methods, with laser excitation, approach 1 species/cm3. Methods relying upon two (or more) laser wavelengths generally have much poorer detection limits than the simpler single-wavelength methods.

Keywords: Luminescence spectroscopy; Photoionization spectroscopy; Photothermal spectroscopy; Raman spectroscopy

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702854248566

Affiliations: Department of Chemistry, University of Florida, Gainesville, Florida 32611

Publication date: May 1, 1985

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