Selecting The Sample Loop; Peristaltic Pump; Principle Of The Peristaltic Pump; Figure 20 Peristaltic Pump - Metrohm 882 Compact IC plus Manual

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3.12.3

Selecting the sample loop

3.13

Peristaltic pump

3.13.1

Principle of the peristaltic pump

882 Compact IC plus – Anion
The amount of sample solution injected depends on the volume of the
sample loop. The choice is made on the basis of the application. The fol-
lowing sample loops are normally used:
Cation determination
Anion determination with suppression
Anion determination without suppression
The Peristaltic pump is used for pumping sample and auxiliary solutions. It
can rotate in both directions.
The peristaltic pump pumps liquids according to the principle of displace-
ment. The pump tubing is clamped between the rollers (20-3) and the
tubing cartridge (20-5). During operation, the peristaltic pump drive
rotates the roller hub (20-2), so that the rollers (20-3) push the liquid for-
ward in the pump tubing.
1
2
Figure 20 Peristaltic pump
3 Installation
10 µL
20 µL
100 µL
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6
5
4
3
7
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