Office of Technology Transfer – University of Michigan

Thermal Modulation and Monitoring for Gas Chromatography

Technology #2825p1

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Researchers
Ernest F. Hasselbrink
Managed By
Joohee Kim
Licensing Specialist, Physical Sciences & Engineering 734.764.8202
Patent Protection
US Patent 7,293,449
US Patent 7,284,409

We disclose a method for achieving fast-response control of the temperature of a metal capillary in gas chromatography applications, by immersing it in a chilled liquid while ohmically heating it. Additionally, we claim a method of monitoring the capillary temperature by measuring its electrical resistance during ohmic heating. Temperature measurement is otherwise difficult to achieve using traditional sensors due to the small size of the capillary and the presence of surrounding liquid.