Publication Date

1988

Document Type

Dissertation/Thesis

First Advisor

Carnahan, Jon W.

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Chemistry

LCSH

Plasma spectroscopy; Emission spectroscopy

Abstract

In the field of elemental analysis, there is a great demand for versatile analytical systems. Recently, microwave-induced plasma (MIP) systems have been proven to produce useable atomic emission from aqueous halogens in the visible region. Because there is a trend of improved detection limits as the power applied to the plasma is increased, a logical step is to increase the applied power far beyond the 500 W limit of initial experiments. In this work, a modified TM₀₁₀ Beenakker cavity was used to maintain a helium kilowatt-plus MIP (KiP-MIP). Instrumental considerations of the microwave focusing device, power train, plasma torch design, microwave generator, sample introduction and optical system used in these studies are presented. Operational characteristics of plasma ignition, generator output, tuning procedures and data collection are thoroughly investigated. Results of plasma energy studies, including electron density and spectroscopic temperature, are discussed in comparison to previous systems. The analytical figures of merit for this system are determined. Detection limits and calibration curves for a number of metals and nonmetals are presented. Results of gas phase and aqueous sample introduction are investigated, conclusions drawn, and directions for further research suggested.

Comments

Bibliography: pages [102]-104.

Extent

vii, 104 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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