Integrated explosive preconcentrator and electrochemical detection system for 2,4,6-trinitrotoluene (TNT) vapor

Karel Cizek, Chad Prior, Chongdee Thammakhet, Michal Galik, Kevin Linker, Ray Tsui, Avi Cagan, John Wake, Jeffrey LaBelle, Joseph Wang

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

This article reports on an integrated explosive-preconcentration/electrochemical detection system for 2,4,6-trinitrotoluene (TNT) vapor. The challenges involved in such system integration are discussed. A hydrogel-coated screen-printed electrode is used for the detection of the thermally desorbed TNT from a preconcentration device using rapid square wave voltammetry. Optimization of the preconcentration system for desorption of TNT and subsequent electrochemical detection was conducted yielding a desorption temperature of 120 °C under a flow rate of 500 mL min-1. Such conditions resulted in a characteristic electrochemical signal for TNT representing the multi-step reduction process. Quantitative measurements produced a linear signal dependence on TNT quantity exposed to the preconcentrator from 0.25 to 10 μg. Finally, the integrated device was successfully demonstrated using a sample of solid TNT located upstream of the preconcentrator.

Original languageEnglish (US)
Pages (from-to)117-121
Number of pages5
JournalAnalytica Chimica Acta
Volume661
Issue number1
DOIs
StatePublished - Feb 19 2010

Fingerprint

Trinitrotoluene
trinitrotoluene
explosive
Vapors
Desorption
desorption
Systems Integration
Equipment and Supplies
Hydrogel
Voltammetry
detection
Electrodes
electrode
Flow rate
Temperature

Keywords

  • Explosive detection
  • Screen-printed electrodes
  • Trinitrotoluene
  • Vapor detection

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Spectroscopy
  • Environmental Chemistry

Cite this

Integrated explosive preconcentrator and electrochemical detection system for 2,4,6-trinitrotoluene (TNT) vapor. / Cizek, Karel; Prior, Chad; Thammakhet, Chongdee; Galik, Michal; Linker, Kevin; Tsui, Ray; Cagan, Avi; Wake, John; LaBelle, Jeffrey; Wang, Joseph.

In: Analytica Chimica Acta, Vol. 661, No. 1, 19.02.2010, p. 117-121.

Research output: Contribution to journalArticle

Cizek, K, Prior, C, Thammakhet, C, Galik, M, Linker, K, Tsui, R, Cagan, A, Wake, J, LaBelle, J & Wang, J 2010, 'Integrated explosive preconcentrator and electrochemical detection system for 2,4,6-trinitrotoluene (TNT) vapor', Analytica Chimica Acta, vol. 661, no. 1, pp. 117-121. https://doi.org/10.1016/j.aca.2009.12.008
Cizek, Karel ; Prior, Chad ; Thammakhet, Chongdee ; Galik, Michal ; Linker, Kevin ; Tsui, Ray ; Cagan, Avi ; Wake, John ; LaBelle, Jeffrey ; Wang, Joseph. / Integrated explosive preconcentrator and electrochemical detection system for 2,4,6-trinitrotoluene (TNT) vapor. In: Analytica Chimica Acta. 2010 ; Vol. 661, No. 1. pp. 117-121.
@article{dcb3b20be16349ae833efaad8586ee63,
title = "Integrated explosive preconcentrator and electrochemical detection system for 2,4,6-trinitrotoluene (TNT) vapor",
abstract = "This article reports on an integrated explosive-preconcentration/electrochemical detection system for 2,4,6-trinitrotoluene (TNT) vapor. The challenges involved in such system integration are discussed. A hydrogel-coated screen-printed electrode is used for the detection of the thermally desorbed TNT from a preconcentration device using rapid square wave voltammetry. Optimization of the preconcentration system for desorption of TNT and subsequent electrochemical detection was conducted yielding a desorption temperature of 120 °C under a flow rate of 500 mL min-1. Such conditions resulted in a characteristic electrochemical signal for TNT representing the multi-step reduction process. Quantitative measurements produced a linear signal dependence on TNT quantity exposed to the preconcentrator from 0.25 to 10 μg. Finally, the integrated device was successfully demonstrated using a sample of solid TNT located upstream of the preconcentrator.",
keywords = "Explosive detection, Screen-printed electrodes, Trinitrotoluene, Vapor detection",
author = "Karel Cizek and Chad Prior and Chongdee Thammakhet and Michal Galik and Kevin Linker and Ray Tsui and Avi Cagan and John Wake and Jeffrey LaBelle and Joseph Wang",
year = "2010",
month = "2",
day = "19",
doi = "10.1016/j.aca.2009.12.008",
language = "English (US)",
volume = "661",
pages = "117--121",
journal = "Analytica Chimica Acta",
issn = "0003-2670",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - Integrated explosive preconcentrator and electrochemical detection system for 2,4,6-trinitrotoluene (TNT) vapor

AU - Cizek, Karel

AU - Prior, Chad

AU - Thammakhet, Chongdee

AU - Galik, Michal

AU - Linker, Kevin

AU - Tsui, Ray

AU - Cagan, Avi

AU - Wake, John

AU - LaBelle, Jeffrey

AU - Wang, Joseph

PY - 2010/2/19

Y1 - 2010/2/19

N2 - This article reports on an integrated explosive-preconcentration/electrochemical detection system for 2,4,6-trinitrotoluene (TNT) vapor. The challenges involved in such system integration are discussed. A hydrogel-coated screen-printed electrode is used for the detection of the thermally desorbed TNT from a preconcentration device using rapid square wave voltammetry. Optimization of the preconcentration system for desorption of TNT and subsequent electrochemical detection was conducted yielding a desorption temperature of 120 °C under a flow rate of 500 mL min-1. Such conditions resulted in a characteristic electrochemical signal for TNT representing the multi-step reduction process. Quantitative measurements produced a linear signal dependence on TNT quantity exposed to the preconcentrator from 0.25 to 10 μg. Finally, the integrated device was successfully demonstrated using a sample of solid TNT located upstream of the preconcentrator.

AB - This article reports on an integrated explosive-preconcentration/electrochemical detection system for 2,4,6-trinitrotoluene (TNT) vapor. The challenges involved in such system integration are discussed. A hydrogel-coated screen-printed electrode is used for the detection of the thermally desorbed TNT from a preconcentration device using rapid square wave voltammetry. Optimization of the preconcentration system for desorption of TNT and subsequent electrochemical detection was conducted yielding a desorption temperature of 120 °C under a flow rate of 500 mL min-1. Such conditions resulted in a characteristic electrochemical signal for TNT representing the multi-step reduction process. Quantitative measurements produced a linear signal dependence on TNT quantity exposed to the preconcentrator from 0.25 to 10 μg. Finally, the integrated device was successfully demonstrated using a sample of solid TNT located upstream of the preconcentrator.

KW - Explosive detection

KW - Screen-printed electrodes

KW - Trinitrotoluene

KW - Vapor detection

UR - http://www.scopus.com/inward/record.url?scp=74549194169&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=74549194169&partnerID=8YFLogxK

U2 - 10.1016/j.aca.2009.12.008

DO - 10.1016/j.aca.2009.12.008

M3 - Article

C2 - 20113724

AN - SCOPUS:74549194169

VL - 661

SP - 117

EP - 121

JO - Analytica Chimica Acta

JF - Analytica Chimica Acta

SN - 0003-2670

IS - 1

ER -