Gas chromatographic separation using controlled carrier gas - passed through dispenser for two=stage process enabling rapid enrichment of investigation substances
A method for gas chromatographic separation of substances involves passing a controlled carrier gas through a specimen dispenser. In a first mode a liquid contg. solvent and specimen is dispensed and access to the separate column is blocked by an auxiliary gas flow, substances to be investigated being retained in an evaporation tube. In a second mode, the substances are evaporated and fed into the column. At least one of the parameters dispensing speed of specimen, temp. in evaporation tube and carrier gas flow rate through the tube is regulated according to the others. All solvent in the tube is evaporated and carried off with the carrier gas. ADVANTAGE - Enables removal of solvent and rapid enrichment of substances to be investigated.
