Importance

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Abstract

A fluidic module for use in a centrifugal microfluidic system includes a fluid chamber with a first chamber region and a second chamber region separated from each other by a partition wall extending radially inwardly with respect to a centre of rotation. A first outlet channel opens into the first chamber region and represents an outflow barrier for a liquid flow from the first chamber region in the form of a radially inwardly rising channel portion which extends to a first radial position. A second outlet channel opens into the second chamber region and represents an outflow barrier for a liquid flow from the second chamber region in the form of a radially inwardly rising channel portion which extends to a second radial position. The first radial position is located radially further inwards than the second radial position, wherein the fluidic module is configured such that, based on a rotation in which a hydrostatic pressure acting on the first and second liquid volumes prevents the liquid volumes from flowing out of the fluid chamber through the first and second outlet channels, a positive pressure in the common air volume required to transfer the first liquid volume out of the fluid chamber through the first outlet channel against the hydrostatic pressure acting on the first liquid volume is greater than a positive pressure in the common air volume required to transfer the second liquid volume out of the fluid chamber through the second outlet channel against the hydrostatic pressure acting on the second liquid volume.

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First Claim