The 4 sliders are
arranged in such a way that they slide past each other. The reagent
slider (1) is stationary and contains the reagent feed lines. The
column slider (2) contains the carrier for 10 "columns".
Sliders 1, 2 und 3 can together
slide past slider 4. Slider 2 can slide between sliders 1 and 3.
Sliders 1 and 3 can slide together only. Thus, the reaction column
(slider 2) can be aligned with the bore holes in sliders 1 und 3,
thus establishing a connection via the reagent feed line (Slider4),
between the reagent and the metering pump (DMT). Precise dosages
can be given with the metering pump (0 – 0.025 ml / rev.).
The reaction vessel
can be loaded with CPG, PVDF membrane, cellulose etc.
Loading can be freely selected within the range
10 nmol - 8 µmol. The sliders are activated by DC motors;
precise positioning is achieved using incremental generators. The
frits used can be regarded as filters as they prevent carrier material
leaking from the column slider.