Greatly Enhanced Detectability of Geothermal Tracers Through Laser-Induced Fluorescence

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Description

WE have successfully completed a four-year R and D project to greatly reduce the detection limit of fluorescent tracers through the use of emerging laser-excitation, optical fiber, and CCD-spectroscopy technologies. Whereas the efforts over the first two years were directed at demonstrating a reduction in the detection limit of fluorescent compounds by a factor of 100 and at identifying several new fluorescein-derived tracer candidates, our recent efforts were focused primarily on the field demonstration of new tracers having detection limits in the low parts-per-quadrillion range. During the summer of 2001, we initiated field tests at the Dixie Valley, Nevada and ... continued below

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Rose, Peter; Harris, Joel; Kilbourn, Phaedra; Kleimeyer, James & Carter, Troy October 30, 2002.

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Description

WE have successfully completed a four-year R and D project to greatly reduce the detection limit of fluorescent tracers through the use of emerging laser-excitation, optical fiber, and CCD-spectroscopy technologies. Whereas the efforts over the first two years were directed at demonstrating a reduction in the detection limit of fluorescent compounds by a factor of 100 and at identifying several new fluorescein-derived tracer candidates, our recent efforts were focused primarily on the field demonstration of new tracers having detection limits in the low parts-per-quadrillion range. During the summer of 2001, we initiated field tests at the Dixie Valley, Nevada and at the Beowawe, Nevada geothermal fields using very small quantities of the fluorescein-derivative 6-carboxyfluorescein. Subsequently, we succeeded in measuring sub-part-per-trillion quantities of that candidate tracer at both the Beowawe and Dixie Valley geothermal reservoirs-using approximately 530 g of tracer at each setting. Our studies indicate that we could have observed a breakthrough using only 0.53 g of 6-carboxyfluorescein. This represents a reduction by a factor of 170,000 below the mass of tracer used in a previous tracer test at Beowawe.

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OSTI as DE00806819

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  • Other Information: PBD: 30 Oct 2002

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  • Report No.: DOE/ID/13619
  • Grant Number: FG07-98ID13619
  • DOI: 10.2172/806819 | External Link
  • Office of Scientific & Technical Information Report Number: 806819
  • Archival Resource Key: ark:/67531/metadc737096

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  • October 30, 2002

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  • Oct. 18, 2015, 6:40 p.m.

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  • Jan. 3, 2017, 12:38 p.m.

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Rose, Peter; Harris, Joel; Kilbourn, Phaedra; Kleimeyer, James & Carter, Troy. Greatly Enhanced Detectability of Geothermal Tracers Through Laser-Induced Fluorescence, report, October 30, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc737096/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.