Patent ID: 6257047
Filing Date: 2001-07-10
Classification: G01N

Abstract:
A method for performing a direct on-column injection of large volumes (>3 .mu.l) of samples (comprising the substance to be analyzed and a solvent) in an gas chromatography analysis apparatus comprising an oven, a gas chromatography column lodged in the oven, a means for the direct transfer into the column of the sample along a column zone during a sample introduction time and a source of carrier gas upstream the column, as well as a detector downstream the column, characterized by the correlation and control of two or more of the following parameters used to define a known set of injection conditions:nature of the solvent and a solvent vapor resulting therefromrate of sample and solvent injectionflow-rate and/or pressure of the carrier gastemperature, over at least of an initial length of the column during the injection,where said method also comprises an injection means to control the length of the column zone wetted by the sample during its introduction, along at least part of said initial column length.