Patent ID: 6389879
Filing Date: 2002-05-21
Classification: G01N

Abstract:
A method for detecting a change of state (recondensation or evaporation) of an injected solventâ€”in case together with a substance to be analyzedâ€”within a capillary tube of a gas-chromatographic apparatus, characterized by the steps of measuring the temperature in correspondence with at least one point of said capillary tube, and/or the pressure, or flowrate of the carrier gas fed into the capillary tube, and of registering changes in said temperature, and/or said gas pressure or flowrate, which are detected when a solvent change of state occurs at every temperature change detecting point and/or within the capillary tube, said temperature change being detected by means of a thermal probe applied to an outside of said capillary tube, at each point to be checked.