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Glow discharge sources for atomic an...

Storey, Andrew Patrick.

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Glow discharge sources for atomic and molecular analyses.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Glow discharge sources for atomic and molecular analyses./
Author:	Storey, Andrew Patrick.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
Description:	230 p.
Notes:	Source: Dissertations Abstracts International, Volume: 78-05, Section: B.
Contained By:	Dissertations Abstracts International78-05B.
Subject:	Analytical chemistry. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10154777
ISBN:	9781369098709

Glow discharge sources for atomic and molecular analyses.
Storey, Andrew Patrick.

Glow discharge sources for atomic and molecular analyses. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 230 p.

Source: Dissertations Abstracts International, Volume: 78-05, Section: B.

Thesis (Ph.D.)--Indiana University, 2016.

This item must not be sold to any third party vendors.

Two types of glow discharges were used and characterized for chemical analysis. The flowing atmospheric pressure afterglow (FAPA) source, based on a helium glow discharge (GD), was utilized to analyze samples with molecular mass spectrometry. A second GD, operated at reduced pressure in argon, was employed to map the elemental composition of a solid surface with novel optical detection systems, enabling new applications and perspectives for GD emission spectrometry. Like many plasma-based ambient desorption-ionization sources being used around the world, the FAPA requires a supply of helium to operate effectively. With increased pressures on global helium supply and pricing, the use of an interrupted stream of helium for analysis was explored for vapor and solid samples. In addition to the mass spectra generated by the FAPA source, schlieren imaging and infrared thermography were employed to map the behavior of the source and its surroundings under the altered conditions. Additionally, a new annular microplasma variation of the FAPA source was developed and characterized. A spectroscopic imaging system that utilized an adjustable-tilt interference filter was used to map the elemental composition of a sample surface by glow discharge emission spectroscopy. This apparatus was compared to other GD imaging techniques for mapping elemental surface composition. The wide bandpass filter resulted in significant spectral interferences that could be partially overcome with chemometric data processing. Because time-resolved GD emission spectroscopy can provide fine depth-profiling measurements, a natural extension of GD imaging would be its application to three-dimensional characterization of samples. However, the simultaneous cathodic sputtering that occur across the sample results in a sampling process that is not completely predictable. These issues are frequently encountered when laterally varied samples are explored with glow discharge imaging techniques. These insights are described with respect to their consequences for both imaging and conventional GD spectroscopic techniques.

ISBN: 9781369098709Subjects--Topical Terms:

3168300
Analytical chemistry.
Subjects--Index Terms:

Ambient sources

Glow discharge sources for atomic and molecular analyses.
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020 $a 9781369098709
035 $a (MiAaPQ)AAI10154777
035 $a (MiAaPQ)indiana:14330
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100 1 $a Storey, Andrew Patrick. $3 3556842
245 1 0 $a Glow discharge sources for atomic and molecular analyses.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2016
300 $a 230 p.
500 $a Source: Dissertations Abstracts International, Volume: 78-05, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Hieftje, Gary M.
502 $a Thesis (Ph.D.)--Indiana University, 2016.
506 $a This item must not be sold to any third party vendors.
520 $a Two types of glow discharges were used and characterized for chemical analysis. The flowing atmospheric pressure afterglow (FAPA) source, based on a helium glow discharge (GD), was utilized to analyze samples with molecular mass spectrometry. A second GD, operated at reduced pressure in argon, was employed to map the elemental composition of a solid surface with novel optical detection systems, enabling new applications and perspectives for GD emission spectrometry. Like many plasma-based ambient desorption-ionization sources being used around the world, the FAPA requires a supply of helium to operate effectively. With increased pressures on global helium supply and pricing, the use of an interrupted stream of helium for analysis was explored for vapor and solid samples. In addition to the mass spectra generated by the FAPA source, schlieren imaging and infrared thermography were employed to map the behavior of the source and its surroundings under the altered conditions. Additionally, a new annular microplasma variation of the FAPA source was developed and characterized. A spectroscopic imaging system that utilized an adjustable-tilt interference filter was used to map the elemental composition of a sample surface by glow discharge emission spectroscopy. This apparatus was compared to other GD imaging techniques for mapping elemental surface composition. The wide bandpass filter resulted in significant spectral interferences that could be partially overcome with chemometric data processing. Because time-resolved GD emission spectroscopy can provide fine depth-profiling measurements, a natural extension of GD imaging would be its application to three-dimensional characterization of samples. However, the simultaneous cathodic sputtering that occur across the sample results in a sampling process that is not completely predictable. These issues are frequently encountered when laterally varied samples are explored with glow discharge imaging techniques. These insights are described with respect to their consequences for both imaging and conventional GD spectroscopic techniques.
590 $a School code: 0093.
650 4 $a Analytical chemistry. $3 3168300
650 4 $a Inorganic chemistry. $3 3173556
650 4 $a Materials science. $3 543314
653 $a Ambient sources
653 $a Glow discharge
653 $a Mass spectrometry
653 $a Optical imaging
653 $a Plasma spectrochemistry
653 $a Surface analysis
690 $a 0486
690 $a 0488
690 $a 0794
710 2 $a Indiana University. $b Chemistry. $3 1020748
773 0 $t Dissertations Abstracts International $g 78-05B.
790 $a 0093
791 $a Ph.D.
792 $a 2016
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10154777