Novel Analytical Techniques Based on an Enhanced Electron Attachment Process

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Sensitive and selective detection of dense non-aqueous liquids (DNAPL), volatile organic compounds (VOC), and other organics, such as polychlorinated biphenyls (PCB), is an area of importance to the DOE's environmental restoration program. Current negative-ion based analytical methods for the detection of these compounds rely on their propensity to form negative ions (in their ground electronic states). However, for compounds with smaller electron capture cross sections, including PCBs with few chlorine atoms and non-chlorinated VOCs, these methods are considerably less sensitive. The objective of our research program is to develop novel analytical techniques that can be expected to be applicable for ... continued below

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Pinnaduwage, Lal A & Buchanan, Michelle V. June 1, 1999.

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Description

Sensitive and selective detection of dense non-aqueous liquids (DNAPL), volatile organic compounds (VOC), and other organics, such as polychlorinated biphenyls (PCB), is an area of importance to the DOE's environmental restoration program. Current negative-ion based analytical methods for the detection of these compounds rely on their propensity to form negative ions (in their ground electronic states). However, for compounds with smaller electron capture cross sections, including PCBs with few chlorine atoms and non-chlorinated VOCs, these methods are considerably less sensitive. The objective of our research program is to develop novel analytical techniques that can be expected to be applicable for a wide variety of molecules with high sensitivity. These are based on the recently discovered enhanced negative ion formation process involving electron attachment to highly-Rydberg states of molecules. We are using two approaches to produce the precursor highly-excited states; one is laser excitation, and the other is discharge based.

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  • Other Information: PBD: 1 Jun 1999

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  • Report No.: EMSP-55328-1999
  • Grant Number: FG07-96ER14714
  • DOI: 10.2172/828201 | External Link
  • Office of Scientific & Technical Information Report Number: 828201
  • Archival Resource Key: ark:/67531/metadc787100

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  • June 1, 1999

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  • Dec. 3, 2015, 9:30 a.m.

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  • Nov. 3, 2016, 7:29 p.m.

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Pinnaduwage, Lal A & Buchanan, Michelle V. Novel Analytical Techniques Based on an Enhanced Electron Attachment Process, report, June 1, 1999; United States. (digital.library.unt.edu/ark:/67531/metadc787100/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.