Functional Description
Working with a magnetic rod
16
Thermo Scientific KingFisher Duo User Manual
Thermo Fisher Scientific
Working with magnetic particles can be divided into five separate
processes:
●
collecting magnetic particles
●
releasing magnetic particles
●
washing magnetic particles
●
incubation
●
concentration
During the collection of the magnetic particles, the magnetic rod is
fully inside the tip. The magnetic rods together with the tip comb move
slowly up and down in the plate and the magnetic particles are collected
onto the edge of the tips. The magnetic rods together with the tip
comb, having collected the magnetic particles, can be lifted out of the
wells and transferred into the next wells.
After collection of the magnetic particles, the magnetic rods together
with the tip comb are lifted from the wells and transferred into the next
wells containing the reagent, the magnetic rods together with the tip
comb are lowered into the wells and the magnetic rods are lifted off.
Magnetic particles are released by moving the tip comb up and down
several times at considerably high speed until all the particles have been
mixed with the substance in the next reaction.
Washing the magnetic particles is a frequent and an important
processing phase. Washing is a combination of the release and
collection processes in wells filled with washing solution.
To maximize washing efficiency, the magnetic rods together with the
tip comb are designed to have minimized liquid-carrying properties.
To keep the magnetic particle suspension evenly mixed in incubating
long-running reactions, the tip comb can be moved up and down in the
solution.
The volume of the first row of the plate can be larger than the volume
of the next row, and this is used for concentration purposes (see
Figure 2–8 below).
Working with a
magnetic rod
Collecting magnetic
particles
Releasing magnetic
particles
Washing magnetic
particles and
incubation
Changing the volume
during the magnetic
particle processing
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