A method for separating particles from a fluid dispersion, particularly
for separating corpuscular components from biological samples, above all
from blood. A separating module suitable for performing the method has a
substrate (5) with flow channels (3), comprising a feed channel (9) for
supplying the dispersion to a junction (10), a first drain channel (11)
for draining fluid having a reduced particle concentration away from the
junction (10), and a second drain channel (12) for draining fluid having
an increased particle concentration away from the junction (10). The
fluid flows so much faster in the second drain channel than in the first
drain channel (12) that due to the different flow speeds the dispersed
particles preferentially flow at the junction (10) further in the second
drain channel (12).