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THE DEVELOPMENT OF THE HOLLOW CATHOD...

MARCUS, RICHARD KENNETH.

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THE DEVELOPMENT OF THE HOLLOW CATHODE PLUME (HCP) AS AN ATOMIZATION/EXCITATION/IONIZATION SOURCE FOR SOLIDS ANALYSIS.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	THE DEVELOPMENT OF THE HOLLOW CATHODE PLUME (HCP) AS AN ATOMIZATION/EXCITATION/IONIZATION SOURCE FOR SOLIDS ANALYSIS./
作者:	MARCUS, RICHARD KENNETH.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 1986,
面頁冊數:	417 p.
附註:	Source: Dissertations Abstracts International, Volume: 47-07, Section: B.
Contained By:	Dissertations Abstracts International47-07B.
標題:	Analytical chemistry. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8705711
ISBN:	9798641464558

THE DEVELOPMENT OF THE HOLLOW CATHODE PLUME (HCP) AS AN ATOMIZATION/EXCITATION/IONIZATION SOURCE FOR SOLIDS ANALYSIS.
MARCUS, RICHARD KENNETH.

THE DEVELOPMENT OF THE HOLLOW CATHODE PLUME (HCP) AS AN ATOMIZATION/EXCITATION/IONIZATION SOURCE FOR SOLIDS ANALYSIS. - Ann Arbor : ProQuest Dissertations & Theses, 1986 - 417 p.

Source: Dissertations Abstracts International, Volume: 47-07, Section: B.

Thesis (Ph.D.)--University of Virginia, 1986.

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

A new type of glow discharge device, the hollow cathode plume (HCP), has been developed as an atomization/excitation/ionization source for atomic spectroscopic analysis of bulk solids and non-conducting powder samples. The source operates on the same fundamental principles characteristic of the glow discharge family of plasma devices. Atomization takes place through a cathodic sputtering step, releasing atoms of the cathode material into the negative glow of the plasma for subsequent excitation or ionization. Excitation of atoms in the plasma appears to be through electron impact collisions while ionization of the sputtered species is accomplished through energy transfer collisions with metastable discharge gas species, Penning-type. The HCP sample takes the form of a small disk with an orifice through the center. Metal alloys or compacted non-conducting samples may be analyzed in this form. The HCP operating in an atomic emission mode is characterized by a high degree of temporal stability with sample-to-sample reproducibilities on the order of 5%. The precision of the technique allows for the application of external standardization methods for quantitative analysis. Spectral and sample matrix effects are shown to be less severe than for other atomic spectroscopic plasmas. Detection limits in alloy and compacted samples are on the order of those obtained for current commercially available techniques. The HCP has been utilized as an ion source for elemental mass spectrometry. The source is characterized by the ability to energetically discriminate between ions of the cathode material and background discharge gas species. Molecular ions are present at very low levels with respect to those of the cathode matrix material. Comparisons between mass spectra of solid copper and compacted geological samples in a copper matrix show little spectral contribution from the sample oxide species.

ISBN: 9798641464558Subjects--Topical Terms:

3168300
Analytical chemistry.

THE DEVELOPMENT OF THE HOLLOW CATHODE PLUME (HCP) AS AN ATOMIZATION/EXCITATION/IONIZATION SOURCE FOR SOLIDS ANALYSIS.
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300 $a 417 p.
500 $a Source: Dissertations Abstracts International, Volume: 47-07, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
502 $a Thesis (Ph.D.)--University of Virginia, 1986.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a A new type of glow discharge device, the hollow cathode plume (HCP), has been developed as an atomization/excitation/ionization source for atomic spectroscopic analysis of bulk solids and non-conducting powder samples. The source operates on the same fundamental principles characteristic of the glow discharge family of plasma devices. Atomization takes place through a cathodic sputtering step, releasing atoms of the cathode material into the negative glow of the plasma for subsequent excitation or ionization. Excitation of atoms in the plasma appears to be through electron impact collisions while ionization of the sputtered species is accomplished through energy transfer collisions with metastable discharge gas species, Penning-type. The HCP sample takes the form of a small disk with an orifice through the center. Metal alloys or compacted non-conducting samples may be analyzed in this form. The HCP operating in an atomic emission mode is characterized by a high degree of temporal stability with sample-to-sample reproducibilities on the order of 5%. The precision of the technique allows for the application of external standardization methods for quantitative analysis. Spectral and sample matrix effects are shown to be less severe than for other atomic spectroscopic plasmas. Detection limits in alloy and compacted samples are on the order of those obtained for current commercially available techniques. The HCP has been utilized as an ion source for elemental mass spectrometry. The source is characterized by the ability to energetically discriminate between ions of the cathode material and background discharge gas species. Molecular ions are present at very low levels with respect to those of the cathode matrix material. Comparisons between mass spectra of solid copper and compacted geological samples in a copper matrix show little spectral contribution from the sample oxide species.
590 $a School code: 0246.
650 4 $a Analytical chemistry. $3 3168300
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792 $a 1986
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=8705711