Metrohm 851 Titrando - Manual (Page 38)

3.5 Titration vessel for coulometric KF titration
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851 Titrando
6 Connect the tubing for the aspiration of the coulometer cell at the
lower connector of the addition and aspiration tube (6).
3.5.4 Coulometer cell with aspiration equipment (utilization with Dos-
ino)
A Dosino allows the automatic replacement of reagents.
For aspiration, the 6.5617.000 aspiration equipment is used, including a
complete dosing unit and a 50 mL glass cylinder. For aspirating greasy
samples when only the sample and not the whole reagent is aspirated, we
recommend using a dosing unit with a 20 mL cylinder. For highly viscous
samples a dosing unit with a 10 mL cylinder is suitable.
Mounting the aspiration tip
2
6.1543.070
3
1
6.1446.060
6.2730.030
Insert the aspiration tip into the coulometer cell as follows:
1 Screw the 6.2730.030 nipple, with stopper and O-ring, onto the
6.1446.060 stopper.
2 Pull out the stopper.
3 Slide the 6.1543.070 aspiration tip through the stopper.