Spectroscopic methods for detection of impurities in water

Natalia V. Strashnikova, Nona Papiashvili, Rivka Cohen-Luria, Shlomo Mark, Guy Shilon, Daniel Khankin, Yehoshua Kalisky, Ofra Kalisky, Abraham H. Parola

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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-to-one 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.

Original languageEnglish
Title of host publicationTechnologies for Optical Countermeasures VIII
DOIs
StatePublished - 29 Nov 2011
EventTechnologies for Optical Countermeasures VIII - Prague, Czech Republic
Duration: 21 Sep 201122 Sep 2011

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8187
ISSN (Print)0277-786X

Conference

ConferenceTechnologies for Optical Countermeasures VIII
Country/TerritoryCzech Republic
CityPrague
Period21/09/1122/09/11

Keywords

  • 3D fluorescence
  • Concentration calibration curves
  • Detection of water impurities
  • Fluorescence imaging
  • Synchronous fluorescence spectroscopy

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