Patent ID: 6955709

Claim:
A method for vaporization injection of large volumes of liquid sample having a substance to be analysed and a solvent, said method comprising the steps of: introducing the liquid sample by means of a syringe needle into a permanently heated vaporization chamber which is part of an injector having an inlet for a carrier gas coupled operatively to a device for gas chromatographic analysis; causing the sample to travel through said vaporization chamber as a liquid band at a high speed; bringing the liquid band traveling at said high speed into contact with a stopping and vaporization means positioned adjacent an inlet of a capillary to thereby collect sample vapours therefrom, and wherein the method is practiced in a splitless mode and the capillary is in the form of a pre-column maintained at a sufficiently low temperature below a dew point of a mixture of the sample vapours and carrier gas at a carrier gas pressure which results in recondensation of at least the solvent vapours in the pre-column to cause the sample vapours to be drawn up from the vaporization chamber and into said pre-column.