Method Type; Titration Mode; Linear Titration - Xylem SI Analytics TitroLine 5000 Manual De Instrucciones

4.6.1

Method type

On the <Method type> you can select whether you wish to perform a manual or automatic titration or a
dosage:
Fig. 57
The selection of the Method type will have an influence on the further parameterisation of the method.
For instance, if you select the dosing mode, neither a selection of a formula nor a change of the
Titration mode (dynamic or linear, etc.) will be available.
4.6.2

Titration mode

In the case of an automatic titration, you can make a selection between the following modes:
•
Linear titration (pH and mV)
•
Dynamic titration (pH and mV)
•
End-point titration (pH, mV)

4.6.2.1 Linear titration

In the case of linear titration, the step size remains identical over the entire titration cycle. Linear
titration is often used for complicated or unknown samples. Complicated examples include, for
instance, chloride in the trace range (-> very flat curve shape) or titrations in non-aqueous media. If
one would use a dynamic titration control in these cases, this would not yield any benefit. Depending
on the parameters, the step sizes used in excessively flat curves would either be too small or too
large. Below an example of a flat and rather unsteady curve shape:
Fig. 58
Titration was performed as a linear titration with a step size of 0.05 ml. In this case, dynamic titration
control with a step size adapted to the curve slope would generate an even more unsteady course of
the curve.
Linear Titration is possible for mV und pH titrations.
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