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Functional Description
Working with a magnetic rod
20
PLEX-ID SP User Manual 10/2009 N09455
Abbott Laboratories
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
plate and transferred into the next plate.
After collection of the magnetic particles, the magnetic rods together
with the tip comb are lifted from the plate, the magnetic rods are lifted
off and the tip comb is lowered into the next plate containing a reagent.
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 a plate 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 long-running
reactions, the tip comb can be moved up and down in the solution.
The volume of the first plate can be larger than the volume of the next
plate, 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
Incubation
Changing the volume
during the magnetic
particle processing
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Страница 93: ...Abbott Molecular Inc 1300 E Touhy Ave Des Plaines IL 60018 USA www abbottmolecular com N09455 ...