Metrohm 900 Touch Control Manual - Manual (Page 27)

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5 Titrations
900 Touch Control
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5 Titrations
5.1 Dynamic equivalence point titration (DET)
Dynamic equivalence point titration is a titration mode for all standard
titrations. The reagent is added in variable volume steps. The volume
increments vary as a function of the slope of the curve. An attempt is
made to achieve constant measured value alterations with each dosing.
The optimal volume for dosing is determined from the measured value
alterations of the previous dosings. Measured value acceptance is drift-
controlled (equilibrium titration) or after a waiting time. Equivalence points
are evaluated automatically.
U/mV
V/mL
Figure 3 Reagent dosing for DET
5.2 Monotonic equivalence point titration (MET)
Monotonic equivalence point titration is a titration mode for titrations
with relatively high signal fluctuations or suddenly occurring potential
jumps and for slow titrations or slow-response electrodes. The reagent is
added in constant volume steps. Measured value acceptance is drift-con-
trolled (equilibrium titration) or after a waiting time. Equivalence points are
evaluated automatically.
U/mV
V/mL
Figure 4 Reagent dosing for MET