THERMAL CONDUCTIVITY DETECTOR FOR GAS CHROMATOGRAPHY Russian patent published in 2005 - IPC

FIELD: gas chromatographic devices; chemical industry; oil industry; metallurgy; medicine; biology etc.

SUBSTANCE: detector can be used in gas chromatographic device as with filled and empty capillaries and micro-nozzle separating columns for analyzing complex mixtures of matters having as natural and artificial origin. Detector has heater made in form of metal thread, two film thermo-sensitive elements mounted in gas channel at output of chromatographic column in parallel to the heater at similar distance. Thermo-sensitive elements are connected into opposite arms of bridge circuit. Electric current source for the heater has automatic controller to keep temperature and resistance of the source to permanent value.

EFFECT: improved precision of detection; improved sensitivity.

2 dwg