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Proceedings Paper

Two-dimensional spargling-IR analysis of trace organics in water
Author(s): Walter Mike Doyle
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Paper Abstract

Sparging-infrared (SP/IR) is a relatively new technique for the analysis of pollutants or other organics dissolved in water. In brief, it involves passing a stream of bubbles through a volume of solute containing liquid so as to transfer solute molecules to a vapor stream where their concentration can be monitored by an FTIR spectrometer. It is especially effective for the measurement of nonpolar substances such as chlorinated hydrocarbons and aromatics where the combination of high volatility and low solubility leads to detectabilities in the low part per billion range. In the work reported here, we have extended the SP/IR technique by making use of time domain information to aid in distinguishing between chemical species having broadly overlapping spectra. This 2-D technique can be used to expand the number of pollutants that can be included in a given analysis or to discriminate against interference from high concentrations of strongly absorbing species.

Paper Details

Date Published: 31 January 1994
PDF: 2 pages
Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); doi: 10.1117/12.166664
Show Author Affiliations
Walter Mike Doyle, Axiom Analytical (United States)

Published in SPIE Proceedings Vol. 2089:
9th International Conference on Fourier Transform Spectroscopy
John E. Bertie; Hal Wieser, Editor(s)

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