Photolytic Spectroscopic Detection of Herbicides and BTEX in Water

  • Mark Johnson
  • Paul Melbourne

Abstract

Fast, sensitive and selective determination of low levels of important contaminants of raw waters used for drinking water supplies has been demonstrated. We use on-line ultraviolet (UV) absorption spectroscopy in the wavelength range 200–400nm performed within a low-power, in-situ, photochemical reactor. Depending on the photolytic source’s peak photon energy and the species to be detected, the photochemical effects include simple reduction of UV-absorbance, as well as the generation of species absorbing at different UV wavelengths. This double spectral signature, together with multivariate linear spectral analysis, allows excellent selectivity in real samples with minimal sample preparation.

Keywords

Difference Spectrum Multivariate Calibration Excellent Selectivity Groundwater Remediation Minimal Sample Preparation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    pHOX500 Organic Pollution Alarm, GLI International Ltd., Eastman Way, Hemel Hempstead, Hertfordshire HP2 7HB U. K.Google Scholar
  2. 2.
    J. J. Aaron, The analyses of fungicides, herbicides and insecticides, Analytical Proceedings, 30:72 (1993).CrossRefGoogle Scholar
  3. 3.
    Stama Ltd. 31/33 Station Road, Chadwell Heath, Romford, Essex RM6 4BL U. K.Google Scholar
  4. 4.
    M. Martinez Galera, J. L. Martinez Vidal, A. Garrido Frenich, and P. Parrilla, Multicomponent determination of Atrazine, Diuron and Chlorpyrifos in groundwaters and soils by spectrophotometry using multivariate calibration, Analyst, 119:1189 (1994).CrossRefGoogle Scholar
  5. 5.
    H. Martens and T. Naes. Multivariate Calibration, Wiley, Chichester (1993). ISBN 0 471 90979 3.Google Scholar

Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • Mark Johnson
    • 1
  • Paul Melbourne
    • 1
  1. 1.North West Water Ltd.WarringtonUK

Personalised recommendations