Metrohm 711 Liquino - Manual (Page 40)

3.2 Tutorial
711 Liquino, Instructions for use 34
A new titration can now be carried out. The number of determinations and
the number of times the cell is to be rinsed out can be entered.
The Liquino offers the possibility of carrying out titrations comfortably and
confidently. Even if the titration cell is only rinsed out once the variations on-
ly amount to 0.01 to 0.02%.
Multiple determinations at defined time intervals are also possible (e.g. peri-
odic sampling of a sample flow).
Preconditions / Preparation
Tubing connections of the "sampling“ Dosino
The determination of the NI 2+ ion by potentiometric endpoint indication can
be carried out with the help of the Cu-ISE electrode. For an elegant automa-
tion of the analysis the following items are required:
• the new 711 Liquino
• 3 Dosino 700s with dosing unit 710: 20 mL and 2x 10 mL glass cylin-
ders. (20mL cylinder for "sampling“ dosing unit).
• any Titrino available (e.g. 716)
• Liquino - Titrino connection cable 6.2141.090
• one Cu-ISE electrode 6.0605.02 with electrode cable 6.2104.020
• one reference electrode 6.0726.100 (KNO
3
sat.) with electrode cable
6.2106.020
• one magnetic stirrer 728
• sampling mode equipment 6.5614.010.
Waste
Port 4
Solvent
Port 3
Titration vessel
Port 2
Sample
Port 1