title: Integrating Paper Chromatography with Electrochemical Detection for the Trace Analysis of TNT in Soil.
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.
authors.affiliation: Science and Engineering Apprenticeship Program, Naval Research Laboratory, Washington, DC 20375, USA. patrick_ryan_@outlook.com.
authors.forename: Patrick
authors.initials: P
authors.lastname: Ryan
authors.affiliation: Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375, USA. daniel.zabetakis@nrl.navy.mil.
authors.forename: Daniel
authors.initials: D
authors.lastname: Zabetakis
authors.affiliation: Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375, USA. david.stenger@nrl.navy.mil.
authors.forename: David A
authors.initials: DA
authors.lastname: Stenger
authors.affiliation: Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375, USA. scott.trammell@nrl.navy.mil.
authors.forename: Scott A
authors.initials: SA
authors.lastname: Trammell
keywords: TNT; electrochemical detection; paper chromatography