Next Article in Journal
Next Article in Special Issue
Previous Article in Journal
Previous Article in Special Issue
Sensors 2007, 7(12), 3258-3271; doi:10.3390/s7123258
Article

Detection of Brominated By-Products Using a Sensor Array Based on Nanostructured Thin Films of Conducting Polymers

1,* , 1
, 1
, Jr. 2
, 1
 and 1
Received: 20 September 2007; Accepted: 19 November 2007 / Published: 12 December 2007
(This article belongs to the Special Issue Electrochemical Sensors Based on Conductive Polymers)
View Full-Text   |   Download PDF [1391 KB, uploaded 21 June 2014]
Abstract: The detection of the carcinogenic trihalomethanes (THM) in public water supplysystems using low-cost equipment has become an essential feature, since these compoundsmay be generated as by-products of water-treatment processes. Here we report on a sensorarray that extends the concept of an “electronic tongue” to detect small amounts ofbromoform, bromodichloromethane and dibromochloromethane, with detection limits aslow as 0.02 mg L-1. The sensor array was made up of 10 sensing units, in whichnanostructured films of conducting and natural polymers were deposited onto goldinterdigitated electrodes. The principle of detection was impedance spectroscopy, withmeasurements carried out in the range between 1 Hz to 1 MHz. Using data at 1 kHz, atwhich the electrical response varied considerably by changing the analyte, we demonstratedwith principal component analysis (PCA) that samples with the 3 brominatedtrihalomethanes can be distinguished from each other and for various concentrations.
Keywords: trihalomethanes; brominated by-products; sensors; conducting polymers. trihalomethanes; brominated by-products; sensors; conducting polymers.
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Carvalho, E.R.; Consolin Filho, N.; Venancio, E.C.; O., O.N., Jr.; Mattoso, L.H.C.; Martin-Neto, L. Detection of Brominated By-Products Using a Sensor Array Based on Nanostructured Thin Films of Conducting Polymers. Sensors 2007, 7, 3258-3271.

AMA Style

Carvalho ER, Consolin Filho N, Venancio EC, O. ON, Jr, Mattoso LHC, Martin-Neto L. Detection of Brominated By-Products Using a Sensor Array Based on Nanostructured Thin Films of Conducting Polymers. Sensors. 2007; 7(12):3258-3271.

Chicago/Turabian Style

Carvalho, Eduarda R.; Consolin Filho, Nelson; Venancio, Everaldo C.; O., Osvaldo N., Jr.; Mattoso, Luiz H.C.; Martin-Neto, Ladislau. 2007. "Detection of Brominated By-Products Using a Sensor Array Based on Nanostructured Thin Films of Conducting Polymers." Sensors 7, no. 12: 3258-3271.



Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert