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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Cizek, Karel Prior, Chad Thammakhet, Chongdee Galik, Michal Linker, Kevin Tsui, Ray Cagan, Avi Wake, John La Belle, Jeff Wang, Joseph |
| Description | Country affiliation: United States Author Affiliation: Cizek K ( Department of Nanoengineering, University of California-San Diego, La Jolla, CA 92093-0448, USA.) |
| 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 degrees 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 microg. Finally, the integrated device was successfully demonstrated using a sample of solid TNT located upstream of the preconcentrator. |
| File Format | HTM / HTML |
| ISSN | 00032670 |
| Issue Number | 1 |
| Volume Number | 661 |
| e-ISSN | 18734324 |
| Journal | Analytica Chimica Acta |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2010-02-19 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Analytical Discipline Chemistry Electrochemistry Instrumentation Explosive Agents Chemistry Trinitrotoluene Methods Analysis Volatilization Journal Article Research Support, Non-u.s. Gov't Research Support, U.s. Gov't, Non-p.h.s. |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Environmental Chemistry Analytical Chemistry Biochemistry |
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