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Estimating Detection Limits in Ultratrace Analysis. Part III: Monitoring Atoms and Molecules with Laser-Induced Fluorescence

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Abstract:

Laser spectroscopic methods which are sensitive enough to detect single atoms or molecules are termed single-atom detection (SAD) techniques. The detection theory of SAD methods, presented in the second paper in this series and summarized here, allows for the evaluation and comparison of these techniques. In this paper, SAD theory is applied to one task in particular: monitoring analyte atoms or molecules as they flow through a continuous-wave laser beam using fluorescence detection (CWLIF). Several possible signal-processing methods are described and evaluated through the use of SAD theory and Monte Carlo simulations. The relative merits of these methods for SAD by CW-LIF are illustrated.

Keywords: Detection limits

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702924124574

Affiliations: 1: Department of Chemistry, University of Florida, Gainesville, Florida 32611-2046; current address: Advanced Monitoring Development Group, Health and Safety Research Division, Oak Ridge National Laboratories, Oak Ridge, TN 37831-6101 2: Department of Chemistry, University of Florida, Gainesville, Florida 32611-2046

Publication date: May 1, 1992

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