A number of data processing and data acquisition methods are presented that enhance the performance of a photodiode array (PDA) spectrometer. Zero-filling or Fourier-domain Interpolation is used to interpolate peak shapes. This improves the accuracy and precision of spectral peak height
and position measurements and can be used to overcome spectral line/diode registry effects. A procedure is presented for the automated calibration and recalibration of the wavelength window measured with a photodiode array spectrometer. This method is based, in part, on cross-correlation of
spectral patterns. Finally it is shown that by programming of the integration time, several spectra can be combined into a single wide-dynamic-range spectrum. Taken as a whole, these data processing and acquisition techniques improve the accuracy, precision, and dynamic range of spectrochemical
data acquired with a PDA spectrometer. This is illustrated by using the system for the rapid measurement of excitation temperatures of plasma sources.
Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
Publication date: September 1, 1990
More about this publication?
The Society publishes the internationally recognized, peer reviewed journal, Applied Spectroscopy, which is available both in print and online. Subscriptions are included with membership or can be purchased by institutional or corporate organizations. Abstracts may be viewed free of charge. Previously published as Bulletin (Society for Applied Spectroscopy)