Sedimentation field flow fractionation channel and method

Details Sedimentation field flow fractionation channel and method Sedimentation field flow fractionation channel and method

1981-11-30

1984-05-01

Hill, Ralph J.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

494 27, 494 37, 494 43, B03B 562

Patent

active

044460147

ABSTRACT:
A free floating plastic channel for sedimentation field flow fractionation is suspended in a centrifuge rotor filled with a compensating liquid. The channel is constructed of a plastic central hub assembly fitted with a plastic outer ring preferably of a lower density than the hub. The hub contains a shallow channel on its outer surface and is interference-fitted to the outer ring to insure a liquid tight seal at zero force field. With the liquid totally surrounding the hub-outer ring assembly, stresses on the plastic parts are essentially equalized even under high force fields and leakage from the channel at the hub-ring interface is greatly reduced.

REFERENCES:
patent: 3465956 (1969-09-01), Beard
patent: 3519201 (1970-07-01), Eisel et al.
patent: 4094461 (1978-06-01), Kellogg et al.
patent: 4283276 (1981-08-01), Grant
patent: 4353795 (1982-10-01), Romanauskas
patent: 4357235 (1982-11-01), Dilks

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