Metrohm 6.00402.300, Руководство пользователя

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5 Maintenance
5.1 Metal electrode – Changing/refilling the electrolyte
1
Open the filler opening.
2
Use a plastic pipette to empty the electrode.
3
Rinse the inside of the electrode with the new electrolyte.
4
Fill the electrode with electrolyte up to the filler opening.
5
Close the filler opening if the electrode is not used immediately.
6
Immerse the electrode in electrolyte solution overnight.
Then, the electrode is ready for use again.
5.2 Assessing a metal electrode
Carrying out a standard titration
1
Fill a 100-mL beaker with 50 mL of deionized water.
2
Add 2 mL of hydrochloric acid ( c =0.1 mol/L).
3
While stirring this mixture, titrate it with silver nitrate ( c =0.1 mol/L)
under the following conditions:
Method DET U
Dosing rate Max.
Signal drift 50 mV/min
Min. waiting time 0 s
Max. waiting time 26 s
Measuring point dis-
tance 4
Min. increment 10.0 µL