Metrohm tiamo 2.3 Manual - Manual (Page 872)

5.6 Commands ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
856 ￭￭￭￭￭￭￭￭ tiamo 2.3
STAT titrations are used, for example, in enzyme analysis where the
enzyme activity can be determined from the resulting dosing rate (in
mL/min).
Reagent addition takes place in two phases during the titration:
￭ Dosing outside the control range
The dosing is carried out at the Max. rate until the Control range is
reached.
￭ Dosing inside the control range
Dosing is finely controlled in this range. The closer the control point,
the slower the dosing until the Min. rate has been reached.
Commands
Depending on the measured value, one of the following two STAT com-
mands can be chosen:
￭ STAT pH
STAT titration with pH electrodes (measured quantity pH)
￭ STAT U
STAT titration with metal electrodes (measured quantity U).
5.6.3.8.2 STAT - Control range
Tab: Method ▶ STAT ▶ Properties... ▶ Control parameters
Set a large control range for steep curves and a small control range for flat
ones. A good approximation for the start of the control range is given by
the point where the tangents intersect.