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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Factors affecting quantitative analysis using Raman and resonance Raman spectroscopy

Unknown Date (has links)
This work deals with the quantitative use of Raman and resonance Raman spectroscopies. The types of difficulties that occur when using these spectroscopies are due to the many factors that affect Raman signals. In Chapter I, the general principles of Raman spectroscopy are discussed which include a description of the instrumentation, a comparison to IR spectroscopy, and a brief overview of the factors that affect the Raman signal. / The determination of azo dyes by resonance-enhanced Raman spectroscopy discussed in Chapter II describes the use of an internal standard to correct the Raman signal for fluctuations in excitation radiation power, optical alignment, and absorbance. Also, the use of frequency exclusion in the Fourier domain and data domain truncation to exclude fluorescence from the Raman signal will be discussed. Limits of detection in the parts-per-billion range are reported due to the resonance enhancement effect. / The use of Raman spectroscopy to detect and determine the concentration of minor components in a nominally pure solid is given in Chapter III. Background removal is accomplished through the use of an abscissa correction. Cross-correlation and least-squares fitting are used for quantitation to obtain limits of detection near 0.1%. Simulations are used to demonstrate how an iterative least-squares fitting program can be used to detect previously unknown impurities. / The effect of absorbance of the incident and scattered radiation on the Raman signal is discussed in Chapter IV. A correction set is derived that is based on an earlier work, but now includes a correction for the collection efficiency of the collecting optics and allows the user to apply the actual physical dimension of the path length. / In Chapter V, the use of a KrF excimer laser as the exciting source in a UV resonance Raman system is discussed. The generation of new lines in the UV by stimulated Raman scattering is described. Also, the problem of saturation and techniques to avoid its effects are discussed. / Source: Dissertation Abstracts International, Volume: 49-12, Section: B, page: 5269. / Major Professor: T. J. Vickers. / Thesis (Ph.D.)--The Florida State University, 1988.
22

AN EVALUATION OF LOW-PRESSURE MICROWAVE-INDUCED PLASMAS AS EXCITATION SOURCES FOR SPECTROANALYTICAL CHEMISTRY

Unknown Date (has links)
Source: Dissertation Abstracts International, Volume: 32-11, Section: B, page: 6256. / Thesis (Ph.D.)--The Florida State University, 1971.
23

CLOSED LOOP COMPUTER OPTIMIZATION OF PULSED HOLLOW CATHODE LAMPS AS SOURCES FOR ATOMIC FLUORESCENCE SPECTROSCOPY

Unknown Date (has links)
Source: Dissertation Abstracts International, Volume: 36-01, Section: B, page: 0192. / Thesis (Ph.D.)--The Florida State University, 1975.
24

CHARACTERIZATION OF SEVERAL DC ARC PLASMA JET DEVICES AS EXCITATION SOURCES FOR EMISSION SPECTROMETRY

Unknown Date (has links)
Source: Dissertation Abstracts International, Volume: 36-06, Section: B, page: 2763. / Thesis (Ph.D.)--The Florida State University, 1975.
25

SIMPLEX OPTIMIZATION OF PULSED HOLLOW CATHODE LAMPS FOR ATOMIC FLUORESCENCE SPECTROSCOPY

Unknown Date (has links)
Source: Dissertation Abstracts International, Volume: 38-08, Section: B, page: 3664. / Thesis (Ph.D.)--The Florida State University, 1977.
26

The Analysis of Plasmid Conformers using Dynamic Size-Sieving Capillary Electrophoresis

Nevins, Stacey 01 January 1998 (has links)
No description available.
27

Novel Derivatizing Agents for the Determination of Methylmercury by Gas Chromatography using Electron Capture Detection

Irwin, Crystal Marie 01 January 2006 (has links)
No description available.
28

Interpretation of GC-MS data by reverse search and relative retention indices

Hein, Christopher 01 January 1981 (has links)
No description available.
29

The Development and Application of a Helium Discharge Detector for Gas Chromatography

Ware, Margaret LaVerne 01 January 1988 (has links)
No description available.
30

Automated Data Acquisition for Analysis of Fly Ash by Graphite Furnace Atomic Absorption Spectrophotometry

Dowds, Eileen 01 January 1989 (has links)
No description available.

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