Abstract: The invention concerns a method and an apparatus for the direct injection of large volumes (>3 &mgr;l) of samples into the column in a 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 and a source of carrier gas upstream the column, as well as a detector downstream the column.
According to the invention two or more of the parameters:
nature of the solvent
injection rate
flow-rate and/or pressure of the carrier gas
temperature at least of an initial length of the column during the injection
are correlated and/or controlled to achieve a control of the length of the zone wetted by the sample during its introduction.
Type:
Grant
Filed:
May 20, 1999
Date of Patent:
July 10, 2001
Assignee:
Themoquest Italia S.p.A.
Inventors:
Konrad Grob, Fausto Munari, Pier Albino Colombo, Paolo Magni