Metrohm 900 Touch Control Manual - Manual (Page 29)

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5 Titrations
900 Touch Control
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EP
KFT Ipol
KFT Upol
EP
V/mL
Continuous
dosing
Initial
dosing
V/mL
V/mL
U/mV
t/s
I/µA
Control range
Control range
Figure 6 Reagent dosing for KFT
5.5 Endpoint titration with constant maintenance of the
measured value (STAT)
The pH STAT titration is the one most frequently utilized. Reagent is added
until a preset measured value (control point) has been reached. This con-
trol point is kept stable by continuously titrating off the substance set free
by the reaction with the reagent. The STAT titration keeps the control
point constant until the preset stop criterion has been reached. The STAT
titration is applied, for example, in analysis of enzymes. The dosing rate
resulting from the the control point being kept stable provides insight into
the activity of an enzyme.