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Development, characterization, and e...

Schwartz, Andrew James.

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Development, characterization, and evaluation of alternative plasma sources for chemical analysis.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Development, characterization, and evaluation of alternative plasma sources for chemical analysis./
Author:	Schwartz, Andrew James.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
Description:	356 p.
Notes:	Source: Dissertations Abstracts International, Volume: 78-04, Section: B.
Contained By:	Dissertations Abstracts International78-04B.
Subject:	Analytical chemistry. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10149598
ISBN:	9781369046984

Development, characterization, and evaluation of alternative plasma sources for chemical analysis.
Schwartz, Andrew James.

Development, characterization, and evaluation of alternative plasma sources for chemical analysis. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 356 p.

Source: Dissertations Abstracts International, Volume: 78-04, Section: B.

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

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

Well recognized for its analytical merit, the inductively coupled plasma (ICP) is the most commonly utilized plasma source in atomic spectrometry. Regrettably, ICP-based methods come with drawbacks: they are expensive, require bulky instrumentation, high radiofrequency power (1-2 kW), and consume large volumes (≥15 L/min) of high-purity Ar. As a result, there is an ongoing search for plasma sources that avoid the disadvantages of the ICP. This thesis details two alternative plasmas. First is the solution-cathode glow discharge (SCGD), an atmospheric-pressure electrical discharge sustained on a flowing solution in the ambient atmosphere. Unlike the ICP, the SCGD is compact, requires no compressed gas, utilizes low, direct-current power (~70 W), and performs analyses by sampling directly from the target solution, thereby obviating the need for a sample-solution nebulizer and greatly reducing memory effects. The second source, the microwave-sustained, inductively coupled, atmospheric-pressure plasma (MICAP), is a microwave analog to the radiofrequency ICP. In place of the copper load coil of the ICP, the MICAP utilizes a dielectric resonator. When driven with a microwave field, the resonator has induced in it polarization currents which generate an oscillating magnetic field that sustains an ICP-like plasma. In contrast to the ICP, The MICAP produces a purely magnetic plasma, free of electrostatic and capacitive coupling, does not require external cooling, is stable in flowing nitrogen and air (eliminating the need for Ar), and is powered by an inexpensive microwave-oven magnetron. Here, studies on the development, characterization, and application of the SCGD and MICAP are described. These studies have enhanced fundamental knowledge of both sources, resulting in more complete optimization and improved analytical performance, enabled application of the sources to a wide variety of molecular analytes, permitted analysis of more complex samples, and greatly enhanced the speed with which samples can be analyzed.

ISBN: 9781369046984Subjects--Topical Terms:

3168300
Analytical chemistry.
Subjects--Index Terms:

Atomic emission spectrometry

Development, characterization, and evaluation of alternative plasma sources for chemical analysis.
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245 1 0 $a Development, characterization, and evaluation of alternative plasma sources for chemical analysis.
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300 $a 356 p.
500 $a Source: Dissertations Abstracts International, Volume: 78-04, 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 Well recognized for its analytical merit, the inductively coupled plasma (ICP) is the most commonly utilized plasma source in atomic spectrometry. Regrettably, ICP-based methods come with drawbacks: they are expensive, require bulky instrumentation, high radiofrequency power (1-2 kW), and consume large volumes (≥15 L/min) of high-purity Ar. As a result, there is an ongoing search for plasma sources that avoid the disadvantages of the ICP. This thesis details two alternative plasmas. First is the solution-cathode glow discharge (SCGD), an atmospheric-pressure electrical discharge sustained on a flowing solution in the ambient atmosphere. Unlike the ICP, the SCGD is compact, requires no compressed gas, utilizes low, direct-current power (~70 W), and performs analyses by sampling directly from the target solution, thereby obviating the need for a sample-solution nebulizer and greatly reducing memory effects. The second source, the microwave-sustained, inductively coupled, atmospheric-pressure plasma (MICAP), is a microwave analog to the radiofrequency ICP. In place of the copper load coil of the ICP, the MICAP utilizes a dielectric resonator. When driven with a microwave field, the resonator has induced in it polarization currents which generate an oscillating magnetic field that sustains an ICP-like plasma. In contrast to the ICP, The MICAP produces a purely magnetic plasma, free of electrostatic and capacitive coupling, does not require external cooling, is stable in flowing nitrogen and air (eliminating the need for Ar), and is powered by an inexpensive microwave-oven magnetron. Here, studies on the development, characterization, and application of the SCGD and MICAP are described. These studies have enhanced fundamental knowledge of both sources, resulting in more complete optimization and improved analytical performance, enabled application of the sources to a wide variety of molecular analytes, permitted analysis of more complex samples, and greatly enhanced the speed with which samples can be analyzed.
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