Authors: Steiner, H.; Jakusch, M.; Kraft, M.; Karlowatz, M.; Baumann, T.; Niessner, R.; Konz, W.; Brandenburg, A.; Michel, K.; Boussard-Plédel, C.; Bureau, B.; Lucas, J.; Reichlin, Y.; Katzir, A.; Fleischmann, N.; Staubmann, K.; Allabashi, R.; Bayona, J.M.; Mizaikoff, B.

Source: Applied Spectroscopy, Volume 57, Issue 6, Pages 187A-198A and 591-727 (June 2003) , pp. 607-613(7)

Publisher: Society for Applied Spectroscopy

Abstract:

A prototype mid-infrared sensor system for the determination of volatile organic pollutants in groundwater was developed and tested under real-world conditions. The sensor comprises a portable Fourier transform infrared spectrometer, coupled to the sensor head via mid-infrared transparent silver halide fiber-optic cables. A 10 cm unclad middle section of the 6-m-long fiber is coated with ethylene propylene copolymer in order to enrich the analytes within the penetration depth of the evanescent field protruding from the fiber sensor head. A mixture of tetrachloroethylene, dichlorobenzene, diethyl phthalate, and xylene isomers at concentrations in the low ppm region was investigated qualitatively and quantitatively in an artificial aquifer system filled with Munich gravel. This simulated real-world site at a pilot scale enables in situ studies of the sensor response and spreading of the pollutants injected into the system with controlled groundwater flow. The sensor head was immersed into a monitoring well of the aquifer system at a distance of 1 m downstream of the sample inlet and at a depth of 30 cm. Within one hour, the analytes were clearly identified in the fingerprint region of the IR spectrum (1300 to 700 cm^-1). The results have been validated by head-space gas chromatography, using samples collected during the field measurement. Five out of six analytes could be discriminated simultaneously; for two of the analytes the quantitative results are in agreement with the reference analysis.

Keywords: CHEMICAL SENSORS; MID-INFRARED FIBER-OPTIC CHEMICAL SENSORS; FT-IR SPECTROSCOPY; ON-LINE POLLUTANT MONITORING; GROUNDWATER MONITORING; AQUIFER ANALYSIS; POLYMER MEMBRANES; SILVER HALIDE FIBERS; VOLATILE ORGANIC COMPOUNDS; VOC

Document Type: Research article

DOI: http://dx.doi.org/10.1366/000370203322005274

Publication date: 2003-06-01

More about this publication?

• The Society publishes the internationally recognized, peer reviewed journal, Applied Spectroscopy, which is available both in print and online. Subscriptions are included with membership or can be purchased by institutional or corporate organizations. Abstracts may be viewed free of charge.
  
  Previously published as Bulletin (Society for Applied Spectroscopy)
• Editorial Board
• Information for Authors
• Submit a Paper
• Subscribe to this Title
• Membership Information
• Request copyrighted SAS materials
• Spectroscopic Nomenclature
• Focus Compendium
• ingentaconnect is not responsible for the content or availability of external websites

Related content

• In this: publication
• By this: publisher
• In this Subject: Analytical Chemistry
• By this author: Steiner, H. ;  Jakusch, M. ;  Kraft, M. ;  Karlowatz, M. ;  Baumann, T. ;  Niessner, R. ;  Konz, W. ;  Brandenburg, A. ;  Michel, K. ;  Boussard-Plédel, C. ;  Bureau, B. ;  Lucas, J. ;  Reichlin, Y. ;  Katzir, A. ;  Fleischmann, N. ;  Staubmann, K. ;  Allabashi, R. ;  Bayona, J.M. ;  Mizaikoff, B.

Website © Publishing Technology. Article copyright remains with the publisher, society or author(s) as specified within the article.

• Terms and conditions
• Privacy policy
• Information for advertisers