Metrohm tiamo 2.1 Manual - Manual (Page 549)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 5 Method
tiamo 2.1 ￭￭￭￭￭￭￭￭ 535
Time
Range
0.0 ... 999999.9 s
Volume
Range
0.00000 ... 9999.99 mL
5.6.3.3 MET
5.6.3.3.1 MET - Overview
Menu item: Method ▶ Paste ▶ New command...
Command for Monotonic Equivalence Point Titrations.
Principle
With this command titrations with reagent addition at constant volume
increments are carried out. Measured value acceptance is drift-controlled
(equilibrium titration) or after a waiting time.
Note
This command is suited for titrations with relatively high signal fluctuations
or suddenly occurring potential jumps and for slow titrations or slowly
responding electrodes.
Evaluation
The equivalence points (EPs) are localized by a procedure based on the For-
tuin method which has been adapted by Metrohm for numerical methods.
A search is made for the largest measured value modification (∆
n
). The exact
EP is determined by using an interpolation factor ρ which depends on the
∆ values before and after ∆
n
.
V
EP
= V
0
+ ρ ∆V