| Laser-enhanced ionization of mercury atoms in an inert atmosphere with avalanche amplification of the signal. | |
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MedLine Citation:
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PMID: 21639354 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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A new method for laser-enhanced ionization detection of mercury atoms in an inert gas atmosphere is described. The method, which is based on the avalanche amplification of the signal resulting from the ionization from a selected Rydberg level reached by a three-step laser excitation of mercury vapor in a simple quartz cell, can be applied to the determination of this element in various matrices by the use of conventional cold atomization techniques. The overall (collisional + photo) ionization efficiency is investigated at different temperatures, and the avalanche amplification effect is reported for Ar and P-10 gases at atmospheric pressure. It is shown that the amplified signal is related to the number of charges produced in the laser-irradiated volume. Under amplifier noise-limited conditions, a detection limit of ∼15 Hg atoms/laser pulse in the interaction region is estimated. |
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Authors:
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W L Clevenger; O I Matveev; S Cabredo; N Omenetto; B W Smith; J D Winefordner |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Analytical chemistry Volume: 69 ISSN: 0003-2700 ISO Abbreviation: Anal. Chem. Publication Date: 1997 Jul |
Date Detail:
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Created Date: 2011-06-06 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370536 Medline TA: Anal Chem Country: United States |
Other Details:
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Languages: eng Pagination: 2232-7 Citation Subset: - |
Affiliation:
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Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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