Investigation of the Temperature Effect on the Sensitivity of Thermal Conductivity Detector

Abstract

Thermal conductivity detector for use in gas dynamic express-analyzers and high-speed chromatography systems is being developed by chemistry department in cooperation with other Samara University departments. This article is devoted to investigating the effect of temperature on detector sensitivity. Silicon underlying with resistive chromium layer was used as a sensitive element of the detector. The temperature dependence of the sensitive element resistance was defined for different chromium film thicknesses. The film thickness which provides the highest sensitivity of the detector was found. Also optimal output channels configuration in the gas chromatograph detector was determined. It provides uniform temperature fields distribution at constant gas-flow rate. 