Title :
High-speed two-dimensional gas chromatography using microfabricated GC columns combined with nanoelectromechanical mass sensors
Author :
Whiting, Joshua J. ; Fix, Cory S. ; Anderson, John M. ; Staton, Alan W. ; Manginell, Ronald P. ; Wheeler, David R. ; Myers, Edward B. ; Roukes, Michael L. ; Simonson, R.J.
Author_Institution :
Sandia Nat. Labs., Albuquerque, NM, USA
Abstract :
We report here for the first time the combination of microfabricated gas chromatography (GC) columns with pneumatic modulation to achieve high-speed comprehensive two-dimensional gas chromatography (GCxGC) using microfabricated components. The GCxGC system is in turn combined with nanoelectromechanical (NEMS) resonator mass sensors that have been coated with a chemically-selective polymer to enhance detection of phosphonate compounds that are useful surrogates for chemical warfare agents (CWA). GC elution peak widths on the order of 20 msec have been achieved. Retention times on the order of 2-4 seconds have been demonstrated for polar compounds, indicating that this microfabricated GCxGC system can be applied for rapid analyses.
Keywords :
chromatography; gas sensors; mass measurement; micromechanical resonators; nanosensors; NEMS; chemical warfare agent; chemically-selective polymer; high-speed two-dimensional gas chromatography; microfabricated gas chromatography column; nanoelectromechanical resonator mass sensors; pneumatic modulation; time 2 s to 4 s; Chemical compounds; Chemical sensors; Gas chromatography; Gas detectors; Laboratories; Monitoring; Nanoelectromechanical systems; Polymer films; Resonance; Resonant frequency; 2-dimensional micro scale gas chromatography; nanoelectromechanical resonator mass sensors;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems Conference, 2009. TRANSDUCERS 2009. International
Conference_Location :
Denver, CO
Print_ISBN :
978-1-4244-4190-7
Electronic_ISBN :
978-1-4244-4193-8
DOI :
10.1109/SENSOR.2009.5285751
