Metrohm tiamo 2.2 Manual - Manual (Page 452)

5.6 Commands ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
438 ￭￭￭￭￭￭￭￭ tiamo 2.2
Note
As the reagent addition in DET depends on the measuring data, the titra-
tion curve should not vary too much from an S-shaped curve.
Evaluation
Equivalence points EP are determined atuomatically in a similar manner to
that described in the Tubbs method (C.F. Tubbs; Anal. Chem 26 (1954)
1670–1671, quoted in Ullman 5 (1980) 659). The volume of the equivalence
point VE is shifted from the inflection point towards the smaller circle of
curvature for real asymmetric titration curves.