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Detection of diverse potential threats in water with an array of optical sensors
University of Roma Tor Vergata, Italy.
University of Roma Tor Vergata, Italy.
University of Roma Tor Vergata, Italy.
University of Roma Tor Vergata, Italy.
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2016 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 236, 997-1004 p.Article in journal (Refereed) Published
Abstract [en]

Optical sensor arrays are widely used for sensing the evolution and the identification of complex patterns of chemicals either in air or in water. This popularity stems from the fact that low-cost, ready-to-use optical devices, made available by the current commercial development of electronics commodities, are complemented by a number of low-cost chemical indicators, suitable for a wide range of applications. Among them, pH indicators, and metalloporphyrins make a solid library of molecules that can be adequately assembled for many different tasks. Here, such an array is used for the identification of toxic compounds of different origin that may be released in water distribution systems as a consequence of either accidents or deliberated contaminations. The compounds considered are intermediate products of chemical industry (dimethyl methylphosphonate and cyclohexanone), drugs (5-Fluorouracil and piperazine) and pesticides (imidacloprid and paraoxon). Results show that the sensors are sensitive, but with low selectivity, in the interval from 10(-7) mol L-1 to 10(-4) mol L-1. The sensor signals show a linear correlation with the logarithm of the concentration. Although the limited selectivity of individual sensors, the different sensitivity patterns allow for a clear identification of the compounds, independent of their concentration.(C) 2016 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA , 2016. Vol. 236, 997-1004 p.
Keyword [en]
Electronic tongue; Color indicators; Optical sensors
National Category
Analytical Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-133519DOI: 10.1016/j.snb.2016.04.080ISI: 000382229700117OAI: oai:DiVA.org:liu-133519DiVA: diva2:1060886
Note

Funding Agencies|European Unions Seventh Framework Programme FP7 [312330]

Available from: 2016-12-30 Created: 2016-12-29 Last updated: 2016-12-30

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Lundström, Ingemar
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CiteExportLink to record
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Citation style
  • apa
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