Metrohm tiamo 2.1 (ProcessLab) - Manual (Page 816)

5.6 Commands ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
800 ￭￭￭￭￭￭￭￭ tiamo 2.1 (ProcessLab)
Fix value
Value of the fix endpoint.
Measured value
Range
-2000.0 ... 2000.0 mV
Time
Range
0.0 ... 999999.9 s
Bromine
Range
0.0 ... 999999.9 µg
5.6.3.8 STAT
5.6.3.8.1 STAT - Overview
Menu item: Method ▶ Paste ▶ New command...
Command for STAT Titrations (STAT).
Principle
In STAT titrations, reagent is added until a preset measured value (control
point) has been reached, which is then maintained at a constant level. The
substance released by the reaction is immediately titrated off with the
reagent in order to maintain the control point. The STAT titration keeps the
control point constant until the preset stop criterion has been reached.
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 nearer the control point, the
slower the dosing takes place until the Min. rate has been reached.