Measuring and testing – Sampler – sample handling – etc. – With heating or cooling
Patent
1979-12-14
1981-11-17
Kreitman, Stephen A.
Measuring and testing
Sampler, sample handling, etc.
With heating or cooling
7386481, 7386484, G01N 110
Patent
active
043003931
ABSTRACT:
The illustrated and preferred embodiment of the present invention is a sample delivery system for packed or open tubular column gas chromatographic apparatus. The apparatus comprises a sample injection valve constructed and arranged to utilize multiple ports wherein a gaseous or liquid sample is injected through a syringe into an injection port, the valve being heated to volatilize the sample which is then temporarily stored in a sample storage loop. The valve apparatus rotates to connect the sample storage loop with an inlet conduit delivering the sample and sweep gas to an exponential dilution flask (EDF). The flask provides an output which delivers a diluted portion of sample with the extent of dilution controlled as a function of time through a second valve assembly. The second valve assembly is switched with a timer to deliver a portion of the sample flow and sweep gas to a capillary bore gas chromatographic apparatus. The first valve may also be used independently as an off-line, septumless inlet for use with packed columns without the dilution stage.
REFERENCES:
patent: 2757541 (1956-08-01), Watson et al.
patent: 3000218 (1961-09-01), Marks et al.
patent: 4022065 (1977-05-01), Ramin et al.
LandOfFree
Sample introduction apparatus for gas chromatographic analysis u does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sample introduction apparatus for gas chromatographic analysis u, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sample introduction apparatus for gas chromatographic analysis u will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1287163