A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 1/00 (2006.01) B01J 19/00 (2006.01) B01L 3/00 (2006.01) G01N 1/00 (2006.01)
Patent
CA 2293019
Liquid components are separated from a liquid using separation devices, such as filters and membranes, in which capillary forces which retain the liquid component to be separated off in the separation device are effective. If the amount of liquid is only small, it can be very difficult to remove the liquid component to be separated off from the separation device in free and unchanged form. This process step is simplified or facilitated by a wedge-shaped cut-out at the exit end of the capillary or in a columnar body which is in contact with the exit end of the capillary. The radius of curvature of the wedge edge is smaller than the radius of the capillary. The base side of the wedge-shaped cut-out is adjacent to a collecting chamber, in which the separated-off liquid component is collected, and in which the capillary forces are smaller than in the capillary. If interfering capillary forces are still effective in. the collecting chamber, a further wedge-shaped cut-out can be provided at the exit end of the collecting chamber. The device makes it possible to separate off liquid components in the microlitre range.
Boehringer Ingelheim Microparts Gmbh
Fetherstonhaugh & Co.
Microparts Gesellschaft Fur Mikrostrukturtechnik Mbh
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