Microchip flow-injection analysis of trace 2,4,6-trinitrotoluene (TNT) using mercury-amalgam electrochemical detector |
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| Authors: | Wang Joseph Pumera Martin |
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| Affiliation: | a Departments of Chemical and Materials Engineering and Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287, USA
b Department of Chemistry, Universitat Autonoma de Barcelona, 08193 Bellaterra, Barcelona, Spain |
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| Abstract: | This paper reports on a microfluidic device for the flow-injection/electrochemistry analysis of nitroaromatic explosive. The response is very fast (150 assays/h), highly sensitive (detection limit 7.0 μg L−1), reproducible and stable (R.S.D. = 2.0%; n = 30) and linear (over 20-100 μg L−1 range). Relevant experimental parameters have been optimized. The new microsystem offers great promise for on-site monitoring of TNT, with significant advantages of speed/warning, sample size, efficiency and cost. Most favorable S/N characteristics were obtained at the Hg/Au-amalgam end-channel detector. |
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| Keywords: | Explosives Microfluidics Flow-injection analysis Electrochemistry |
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