''Novel Optical Detection Schemes for In-Situ Mapping of Volatile Organochlorides in the Vadose Zone''

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Long-term objective is to develop a system for measuring and identifying a wide range of volatile organic hydrocarbons, including aromatics, carbon tetrachloride, TCE and other organochlorides, at ppb levels in-situ in the subsurface (''at-depth'') using a fiber-optic REMPI probe in a cone penetrometer. Specific focus of much of the proposed work is to identify and optimize those experimental parameters which effect the in-situ determination of organic molecules in the subsurface using resonance-enhanced multi-photon ionization (REMPI). Emphasis is placed on visible excitation so that the high transmission of fiber-optics at visible wavelengths can be fully utilized. A fiber-optic REMPI system is ... continued below

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Angel, S. Michael & Gribb, Molly M. June 1, 2001.

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Description

Long-term objective is to develop a system for measuring and identifying a wide range of volatile organic hydrocarbons, including aromatics, carbon tetrachloride, TCE and other organochlorides, at ppb levels in-situ in the subsurface (''at-depth'') using a fiber-optic REMPI probe in a cone penetrometer. Specific focus of much of the proposed work is to identify and optimize those experimental parameters which effect the in-situ determination of organic molecules in the subsurface using resonance-enhanced multi-photon ionization (REMPI). Emphasis is placed on visible excitation so that the high transmission of fiber-optics at visible wavelengths can be fully utilized. A fiber-optic REMPI system is being designed and integrated into an existing cone penetrometer system at LLNL. The design will be compatible with existing Raman and fluorescence probes.

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  • Other Information: PBD: 1 Jun 2001

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  • Report No.: EMSP-70050--2001
  • Grant Number: FG07-99ER62881
  • DOI: 10.2172/833498 | External Link
  • Office of Scientific & Technical Information Report Number: 833498
  • Archival Resource Key: ark:/67531/metadc778757

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  • June 1, 2001

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • April 21, 2016, 3:18 p.m.

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Angel, S. Michael & Gribb, Molly M. ''Novel Optical Detection Schemes for In-Situ Mapping of Volatile Organochlorides in the Vadose Zone'', report, June 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc778757/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.