AN INVESTIGATION OF INDUCTIVELY COUPLED PLASMA - ATOMIC EMISSION SPECTRAL INFORMATION IN THE FOURIER DOMAIN.

摘要

Vector-based mathematics in the Fourier Domain has been shown to yield excellent qualitative and quantitative information with infrared absorption spectra. Until now, the use of atomic spectral information in the Fourier Domain has not been explored. Many researchers have shown the utility of obtaining information with a Fourier Spectrometer. They have not, however, been able to obtain analytical information directly from the output (interferogram). Rather, they have had to convert the interferogram to a conventional output (intensity versus wavelength) by means of a Fast Fourier Transform (FFT).;This study explores the use of Inductively Coupled Plasma Emission in the Fourier Domain. Both qualitative and quantitative information can be obtained directly from the interferogram. Unfortunately due to the lack of a Fourier interferometer at Arizona State University, the needed information was obtained with a conventional scanning monochromator and transformed to the Fourier Domain via a FFT routine. The transformed spectrum is manipulated with vector-based mathematics to yield the important elemental information about the sample. The practicality of these theories are demonstrated through their application in analyzing standard geological materials.;The Inductively Coupled Plasma (ICP) Spectrometer simultaneously yields a wealth of information about the composition of a sample. It is capable of sensitive detection of over seventy elements in the sub-parts-per-million level. The only method currently available to record all this information simultaneously is the photographic plate which is tedious and hard to quantify. Electronic alternatives to the photographic plate are constantly being sought in hopes to simplify the acquisition of this information.