Two-dimensional spargling-IR analysis of trace organics in water

Walter Mike Doyle

doi:10.1117/12.166664

31 January 1994 Two-dimensional sparging-IR analysis of trace organics in water

Walter Mike Doyle

Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166664
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

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.

Citation Download Citation

Walter Mike Doyle "Two-dimensional sparging-IR analysis of trace organics in water", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166664

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