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Sensors 2015, 15(7), 17048-17056; doi:10.3390/s150717048

Integrating Paper Chromatography with Electrochemical Detection for the Trace Analysis of TNT in Soil

1
Science and Engineering Apprenticeship Program, Naval Research Laboratory, Washington, DC 20375, USA
2
Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375, USA
*
Author to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 20 May 2015 / Revised: 2 July 2015 / Accepted: 8 July 2015 / Published: 14 July 2015
(This article belongs to the Section Chemical Sensors)
View Full-Text   |   Download PDF [1424 KB, uploaded 14 July 2015]   |  

Abstract

We report on the development of an electrochemical probe for the trace analysis of 2,4,6-trinitrotoluene (TNT) in soil samples. The probe is a combination of graphite electrodes, filter paper, with ethylene glycol and choline chloride as the solvent/electrolyte. Square wave chromatovoltammograms show the probes have a sensitivity for TNT of 0.75 nA/ng and a limit of detection of 100 ng. In addition, by taking advantage of the inherent paper chromatography step, TNT can be separated in both time and cathodic peak potential from 4-amino-dinitrotolene co-spotted on the probe or in soil samples with the presence of methyl parathion as a possible interferent. View Full-Text
Keywords: TNT; paper chromatography; electrochemical detection TNT; paper chromatography; electrochemical detection
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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. (CC BY 4.0).

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MDPI and ACS Style

Ryan, P.; Zabetakis, D.; Stenger, D.A.; Trammell, S.A. Integrating Paper Chromatography with Electrochemical Detection for the Trace Analysis of TNT in Soil. Sensors 2015, 15, 17048-17056.

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