BIOMAT Database Logo BIOMAT Database Logo

Integrated explosive preconcentrator and electrochemical detection system for 2,4,6-trinitrotoluene (TNT) vapor. 2010

Karel Cizek, and Chad Prior, and Chongdee Thammakhet, and Michal Galik, and Kevin Linker, and Ray Tsui, and Avi Cagan, and John Wake, and Jeff La Belle, and Joseph Wang
Department of Nanoengineering, University of California-San Diego, La Jolla, CA 92093-0448, USA.

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.

UI MeSH Term Description Entries
D004563 Electrochemistry The study of chemical changes resulting from electrical action and electrical activity resulting from chemical changes. Electrochemistries
D014303 Trinitrotoluene A 2,4,6-trinitrotoluene, which is an explosive chemical that can cause skin irritation and other toxic consequences. TNT,2,4,6-Trinitrotoluene
D014835 Volatilization A phase transition from liquid state to gas state, which is affected by Raoult's law. It can be accomplished by fractional distillation. Vaporization,Volatility
D053834 Explosive Agents Substances that are energetically unstable and can produce a sudden expansion of the material, called an explosion, which is accompanied by heat, pressure and noise. Other things which have been described as explosive that are not included here are explosive action of laser heating, human performance, sudden epidemiological outbreaks, or fast cell growth. Explosive,Explosives,Agents, Explosive

Related Publications

Karel Cizek, and Chad Prior, and Chongdee Thammakhet, and Michal Galik, and Kevin Linker, and Ray Tsui, and Avi Cagan, and John Wake, and Jeff La Belle, and Joseph Wang
2,4,6-TRINITROTOLUENE (TNT).
January 1964, American Industrial Hygiene Association journal,
Karel Cizek, and Chad Prior, and Chongdee Thammakhet, and Michal Galik, and Kevin Linker, and Ray Tsui, and Avi Cagan, and John Wake, and Jeff La Belle, and Joseph Wang
Incorporation of 2,4,6-trinitrotoluene (TNT) transforming bacteria into explosive formulations.
June 2009, Journal of hazardous materials,
Karel Cizek, and Chad Prior, and Chongdee Thammakhet, and Michal Galik, and Kevin Linker, and Ray Tsui, and Avi Cagan, and John Wake, and Jeff La Belle, and Joseph Wang
Biotransformation and partial mineralization of the explosive 2,4,6-trinitrotoluene (TNT) by rhizobia.
June 2001, Canadian journal of microbiology,
Karel Cizek, and Chad Prior, and Chongdee Thammakhet, and Michal Galik, and Kevin Linker, and Ray Tsui, and Avi Cagan, and John Wake, and Jeff La Belle, and Joseph Wang
A bioinspired peptide matrix for the detection of 2,4,6-trinitrotoluene (TNT).
April 2020, Biosensors & bioelectronics,
Karel Cizek, and Chad Prior, and Chongdee Thammakhet, and Michal Galik, and Kevin Linker, and Ray Tsui, and Avi Cagan, and John Wake, and Jeff La Belle, and Joseph Wang
Anaerobic transformation of 2,4,6-trinitrotoluene (TNT).
January 1993, Archives of microbiology,
Karel Cizek, and Chad Prior, and Chongdee Thammakhet, and Michal Galik, and Kevin Linker, and Ray Tsui, and Avi Cagan, and John Wake, and Jeff La Belle, and Joseph Wang
Near infrared optical biosensor based on peptide functionalized single-walled carbon nanotubes hybrids for 2,4,6-trinitrotoluene (TNT) explosive detection.
June 2018, Analytical biochemistry,
Karel Cizek, and Chad Prior, and Chongdee Thammakhet, and Michal Galik, and Kevin Linker, and Ray Tsui, and Avi Cagan, and John Wake, and Jeff La Belle, and Joseph Wang
Smartphone-based portable biosensing system using impedance measurement with printed electrodes for 2,4,6-trinitrotoluene (TNT) detection.
August 2015, Biosensors & bioelectronics,
Karel Cizek, and Chad Prior, and Chongdee Thammakhet, and Michal Galik, and Kevin Linker, and Ray Tsui, and Avi Cagan, and John Wake, and Jeff La Belle, and Joseph Wang
Ecotoxicological evaluation of in situ bioremediation of soils contaminated by the explosive 2,4,6-trinitrotoluene (TNT).
January 2003, Environmental pollution (Barking, Essex : 1987),
Karel Cizek, and Chad Prior, and Chongdee Thammakhet, and Michal Galik, and Kevin Linker, and Ray Tsui, and Avi Cagan, and John Wake, and Jeff La Belle, and Joseph Wang
Screening for soil toxicity and mutagenicity using luminescent bacteria--a case study of the explosive 2,4,6-trinitrotoluene (TNT).
February 2002, Ecotoxicology and environmental safety,
Karel Cizek, and Chad Prior, and Chongdee Thammakhet, and Michal Galik, and Kevin Linker, and Ray Tsui, and Avi Cagan, and John Wake, and Jeff La Belle, and Joseph Wang
Synthesis of 2,4,6-Trinitrotoluene (TNT) Using Flow Chemistry.
August 2020, Molecules (Basel, Switzerland),
Copied contents to your clipboard!