Nanodroplet quantification: pushing the detection limits of micro x-ray fluorescence

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In this study, detection limits for a variety of elements were determined on an EDAX Eagle I1 MXRF system equipped with a polycapillary and a Rh X-ray source. Both mass, volume, and spot diameter detection limits were established using dried spot technology, where various volumes and/or masses of different elements were deposited on different substrates, dried, and quantitatively analyzed by MXRF. Preliminary results have shown that sub-nanogram levels of material can be detected in less than 200 pm diameter spot sizes deposited on thin polymer films. Specifically, detection limits were found for a given element as a function of mass ... continued below

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22 p.

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Miller, T. C. (Thomasin C.) & Havrilla, G. J. (George J.) January 1, 2002.

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Description

In this study, detection limits for a variety of elements were determined on an EDAX Eagle I1 MXRF system equipped with a polycapillary and a Rh X-ray source. Both mass, volume, and spot diameter detection limits were established using dried spot technology, where various volumes and/or masses of different elements were deposited on different substrates, dried, and quantitatively analyzed by MXRF. Preliminary results have shown that sub-nanogram levels of material can be detected in less than 200 pm diameter spot sizes deposited on thin polymer films. Specifically, detection limits were found for a given element as a function of mass deposited for a given spot volume, and volume deposited for a given mass. The effect of the presence of multiple elements in a droplet on the detection limit was also investigated. For example, the detection limit for copper was determined when it was deposited as a single Cu solution and in various multielement mixtures containing from 2 up to 10 different elements. To determine how the substrate affects the detection limit of different species, elemental dried spots were analyzed on different polymer films, including polypropylene and AP 1 . Comparisons were also made to elements deposited on different spherical, resin substrates such as polystyrene beads.

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22 p.

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  • Submitted to Federation of Analytical Chemistry and Spectroscopy Societies Conference (FACSS), Providence, RI, Oct. 13-18, 2002

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  • Report No.: LA-UR-02-6392
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 976380
  • Archival Resource Key: ark:/67531/metadc925726

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 2002

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 12:35 p.m.

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Miller, T. C. (Thomasin C.) & Havrilla, G. J. (George J.). Nanodroplet quantification: pushing the detection limits of micro x-ray fluorescence, article, January 1, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc925726/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.