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Optofluidic ring resonator sensors for rapid DNT vapor detection
- Source :
- The Analyst. 134(7)
- Publication Year :
- 2009
-
Abstract
- We demonstrated rapid 2,4-dinitrotoluene (DNT) vapor detection at room temperature based on an optofluidic ring resonator (OFRR) sensor. With the unique on-column separation and detection features of OFRR vapor sensors, DNT can be identified from other interferences coexisting in the analyte sample mixture, which is especially useful in the detection of explosives from practical complicated vapor samples usually containing more volatile analytes. The DNT detection limit is approximately 200 pg, which corresponds to a solid phase microextraction (SPME) sampling time of only 1 second at room temperature from equilibrium headspace. A theoretical analysis was also performed to account for the experimental results. Our study shows that the OFRR vapor sensor is a promising platform for the development of a rapid, low-cost, and portable analytical device for explosive detection and monitoring.
- Subjects :
- Detection limit
Analyte
Time Factors
Explosive material
Chemistry
Analytical chemistry
Temperature
Reproducibility of Results
Solid-phase microextraction
Ring (chemistry)
Biochemistry
Chemistry Techniques, Analytical
Organophosphates
Analytical Chemistry
Polyethylene Glycols
Resonator
Dinitrobenzenes
Models, Chemical
Limit of Detection
Electrochemistry
Environmental Chemistry
Explosive detection
Sampling time
Volatilization
Spectroscopy
Subjects
Details
- ISSN :
- 13645528
- Volume :
- 134
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- The Analyst
- Accession number :
- edsair.doi.dedup.....f441f3720159b07c1cf309e22179ff6b