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Micromachines 2015, 6(7), 865-878; doi:10.3390/mi6070865

All Silicon Micro-GC Column Temperature Programming Using Axial Heating

1
School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30324, USA
2
Department of Chemistry, Spelman College, Atlanta, GA 30314, USA
3
Food Processing Center, Georgia Tech Research Institute (GTRI), Atlanta, GA 30318, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Manabu Tokeshi
Received: 14 May 2015 / Revised: 19 June 2015 / Accepted: 3 July 2015 / Published: 10 July 2015
(This article belongs to the Special Issue Micro/Nano Devices for Chemical Analysis)
View Full-Text   |   Download PDF [4238 KB, uploaded 10 July 2015]   |  

Abstract

In this work we present a high performance micro gas chromatograph column with a novel two dimensional axial heating technique for faster and more precise temperature programming, resulting in an improved separation performance. Three different axial resistive heater designs were simulated theoretically on a 3.0 m × 300 μm × 50 μm column for the highest temperature gradient on a 22 by 22 μm column. The best design was then micro-fabricated and evaluated experimentally. The simulation results showed that simultaneous temperature gradients in time and distance along the column are possible by geometric optimization of the heater when using forced convection. The gradients along the column continuously refocused eluting bands, offsetting part of the chromatographic band spreading. The utility of this method was further investigated for a test mixture of three hydrocarbons (hexane, octane, and decane). View Full-Text
Keywords: gas chromatography; MEMS; joule heating; thermal gradient gas chromatography; MEMS; joule heating; thermal gradient
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Navaei, M.; Mahdavifar, A.; Dimandja, J.-M.D.; McMurray, G.; Hesketh, P.J. All Silicon Micro-GC Column Temperature Programming Using Axial Heating. Micromachines 2015, 6, 865-878.

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