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Proceedings Paper

Spectroscopic methods for detection of impurities in water
Author(s): Natalia V. Strashnikova; Nona Papiashvili; Rivka Cohen-Luria; Shlomo Mark; Guy Shilon; Daniel Khankin; Yehoshua Kalisky; Ofra Kalisky; Abraham H. Parola
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Paper Abstract

Optical photoluminescence spectroscopic method for detection of impurities, hazardous materials, pesticides, and pollutants in water resources, both qualitatively and quantitatively, is presented. The method is based on synchronous fluorescence spectroscopy (SFS) of organic aromatic compounds, or poly-aromatic hydrocarbons (PAH), and is carried out by following simultaneously their excitation and emission spectra. The full excitation emission matrix (EEM) generated in this way provides a 2-D and 3-D fluorescence map of the tested sample and the diagonals through the axes origin provide the synchronous fluorescence spectra at a constant wavelengths differences between the emission and excitation wavelengths, thus enabling multitude components identification. This map contains all the relevant spectroscopic information of the tested sample, and serves as a unique "fingerprint" with a very specific and accurate identification. When compared with pre-determined spectra and calibration curves from a "databank", there is a one-toone correspondence between the image and the specific compound, and it can be identified accurately both qualitatively and quantitatively. This method offers several significant advantages, and it provides a sensitive (ppm detection level), accurate and simple spectroscopic tool to monitor impurities and pollutants in water. The design and performance of the spectrofluorimeter prototype, as well as the software development and analysis of chemical organic compounds and mixtures in water will be discussed in this paper.

Paper Details

Date Published: 6 October 2011
PDF: 8 pages
Proc. SPIE 8187, Technologies for Optical Countermeasures VIII, 81870I (6 October 2011); doi: 10.1117/12.903737
Show Author Affiliations
Natalia V. Strashnikova, Ben-Gurion Univ. of the Negev (Israel)
Nona Papiashvili, Ben-Gurion Univ. of the Negev (Israel)
Rivka Cohen-Luria, Ben-Gurion Univ. of the Negev (Israel)
Shlomo Mark, Shamoon College of Engineering (Israel)
Guy Shilon, Shamoon College of Engineering (Israel)
Daniel Khankin, Shamoon College of Engineering (Israel)
Yehoshua Kalisky, Nuclear Research Ctr. Negev (Israel)
Ofra Kalisky, Jerusalem College of Technology (Israel)
Abraham H. Parola, Ben-Gurion Univ. of the Negev (Israel)

Published in SPIE Proceedings Vol. 8187:
Technologies for Optical Countermeasures VIII
David H. Titterton; Mark A. Richardson, Editor(s)

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