Chemistry: analytical and immunological testing – Including titration or ph determination
Patent
1994-04-14
1996-03-05
McMahon, Timothy M.
Chemistry: analytical and immunological testing
Including titration or ph determination
436169, 436171, 436178, 422 58, 422 59, 422 8206, 422 8209, 422102, 95285, G01N 2103, G01N 2177
Patent
active
054967414
ABSTRACT:
A device and process for increasing analyte concentration in a sorbent from a source of analytes contained in a sample uses means for increasing a temperature differential between the sample and the sorbent. The sorbent can be a polymeric coating on a substrate. The sorbent is located in a headspace of the sample and has internal cooling means such as liquid carbon dioxide so that the sorbent can be cooled relative to the sample. Preferably, the sample is heated to further increase the temperature differential between the sample and the sorbent. As the temperature differential increases, a partition coefficient of the sorbent/sample also increases. Preferably, the sorbent is located in a headspace of the sample. Previously, for certain analytes, the partition coefficient was too low and the concentration of analytes extracted into the sorbent from the sample was insufficient to provide an accurate measurement of concentration.
REFERENCES:
patent: D319879 (1991-09-01), Wachob et al.
patent: 4081402 (1978-03-01), Levy et al.
patent: 4147764 (1979-04-01), Levy et al.
patent: 4362356 (1982-12-01), Williams et al.
patent: 4388272 (1983-06-01), Gesteland
patent: 4966695 (1990-10-01), Joshua
patent: 5105851 (1992-04-01), Fogelman
patent: 5142143 (1992-08-01), Fite et al.
patent: 5153666 (1992-10-01), Pawliszyn
patent: 5169521 (1992-12-01), Oka et al.
patent: 5237824 (1993-08-01), Pawliszyn
patent: 5250093 (1993-10-01), Jiang et al.
patent: 5279742 (1994-01-01), Markell et al.
patent: 5302191 (1994-04-01), Koutrakis et al.
patent: 5304493 (1994-04-01), Nowak
patent: 5358557 (1994-10-01), Jiang et al.
"New Solvent-free Samples Preparation Techniques", Environ Sci. Technol vol. 28 No. 13 1994.
Bhat N.
McMahon Timothy M.
Schnurr Daryl W.
University of Waterloo
LandOfFree
Device and process for increasing analyte concentration in a sor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device and process for increasing analyte concentration in a sor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device and process for increasing analyte concentration in a sor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1412541