The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 1998
Filed:
Oct. 18, 1996
William E Brewer, Columbia, SC (US);
Other;
Abstract
The present invention advances a chemical concentrating device for use with thin layer chromatographic, gas chromatographic, high pressure liquid chromatographic, and capillary electrophoresis analysis. The concentrating device has a T-shaped member having a first and second annular branch in axial alignment and a third branch perpendicular to the first and second branches. When used in thin layer chromatographic analysis, the T-shaped member is placed over the syringe needle with the end of the needle extending below the second branch. A gas source in fluid communication with the third branch forwards gas in an annular pattern about the end of the needle, thereby evaporating the solvent within the sample and confining the sample to a particular geometrical area on the thin layer chromatography plate. When used with other chromatographic techniques, the T-shaped member is removably affixed to a syringe needle having a beveled end. The introduction of an annular gas flow about the beveled end evaporates the solvent and concentrates the sample at the needle's end.