Document Type

Thesis - Open Access

Award Date

1984

Degree Name

Master of Science (MS)

Department

Chemistry

First Advisor

David C. Hilderbrand

Abstract

A small quantity of nickel oxide and cobalt oxide is often added to the screen glass for both black and white and color television screens. These oxides give the glass a primarily neutral grey color. The purpose is to mitigate the influence of light sources outside the television set. Reflection of light from these sources against the luminescent layer can result in a noticeable reduction of the picture contrast. The effect of these colored oxides is based on the fact that the light reflected by the lumines cent layer passes through the screen glass twice and the light emitted by the luminescent layer passes through the glass only once. Thus, the reflected light is more attenuated than the emitted light. The ratio between the quantities of nickel oxide and cobalt oxide is selected to give a desired overall transmission for visible light. In a TV glass manufacturing plant, specifications for internal screen glass color are established to control color quality. Although the concentrations of these colored oxides are quite low, they very significantly affect glass color. There is a need for an accurate, highly sensitive method for the analysis of nickel oxide and cobalt oxide in TV screen glass samples. Flameless atomic absorption spectroscopy has the potential for the successful determination of nickel and cobalt in these glass samples due to its high sensitivity. A complete evaluation of the method was needed before routine laboratory analysis application could be made. The purpose of this work was to study the application of flameless atomic absorption spectroscopy to the analysis of television glass for nickel and cobalt.

Library of Congress Subject Headings

Atomic absorption spectroscopy
Cobalt -- Spectra
Nickel -- Spectra
Glass -- Analysis

Format

application/pdf

Number of Pages

77

Publisher

South Dakota State University

Rights

No Copyright - United State
http://rightsstatements.org/vocab/NoC-US/1.0/

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