Inventors:
Yong Jiang - Salt Lake City UT
Marcia E. Hansen - Salt Lake City UT
Michael E. Miller - Salt Lake City UT
Andreas M. Kummerow - Salt Lake City UT
Assignee:
FFFractionation, LLC - Salt Lake City UT
International Classification:
G01N 118, G01N 1504, B03B 566, B03C 3017, B03D 300
Abstract:
Sample focusing method and device for field-flow fractionation techniques that lead to improved detection, improved separation resolution, and a compressed sample plug while permitting a more straightforward quantitation of peaks and reliable large volume injections. The method and technique can be implemented in separations that are performed by a variety of field-flow fractionation techniques, including thermal FFF, electrical FFF, sedimentation FFF, gravitational FFF, dielectric FFF, photophoretic FFF, flow FFF, asymmetric flow FFF, and symmetric flow FFF. The sample focusing device can be integrally built into a separation channel or it can be manufactured as an attachable independent piece.