Chemistry: analytical and immunological testing – Including sample preparation – Gaseous sample or with change of physical state
Patent
1998-08-10
1999-08-03
Warden, Jill
Chemistry: analytical and immunological testing
Including sample preparation
Gaseous sample or with change of physical state
422102, G01N 122
Patent
active
059324821
ABSTRACT:
A headspace autosampling apparatus (92) for generating and delivering gaseous samples to a gas chromatograph or other instrument. The vials are delivered one at a time through a vial delivery mechanism (160) to a heated zone (146) wherein the substances (94, 96) to be analyzed reach equilibrium with the headspace (100, 102) above the samples in the vials. The vials are generally cylindrical and extend horizontally to facilitate attainment of equilibrium rapidly upon heating. The vials are also preferably rotated about their longitudinal axis prior to sampling so as to achieve a film effect on the interior walls of the vials which further aids in attainment of equilibrium. The apparatus is operative to first pressurize the headspace in the vial with an inert gas, and then to place said headspace in fluid communication with the inlet of a gas chromatograph wherein analyses in the headspace volume are analyzed to determine the composition thereof. One form of vial (260) operates to minimize changes in amounts of materials in the sample due to changes in equilibrium during sampling.
REFERENCES:
patent: 4248355 (1981-02-01), Kolb et al.
patent: 5344780 (1994-09-01), Nonboe
patent: 5356814 (1994-10-01), Carrico, Jr. et al.
patent: 5458113 (1995-10-01), Burns
patent: 5516692 (1996-05-01), Berndt
patent: 5567309 (1996-10-01), Classon et al.
patent: 5580530 (1996-12-01), Kowatch et al.
patent: 5711786 (1998-01-01), Hinshaw
patent: 5732476 (1998-03-01), Pare
patent: 5750075 (1998-05-01), Spike
patent: 5792423 (1998-08-01), Markelov
patent: 5827944 (1998-10-01), Nickerson
patent: 5849505 (1998-12-01), Guirguis
Jocke Ralph E.
Lee Paul J.
Warden Jill
LandOfFree
Headspace vial apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Headspace vial apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Headspace vial apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-849047