Metrohm tiamo 2.2 Manual - Manual (Page 453)

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tiamo 2.2 ￭￭￭￭￭￭￭￭ 439
The figure shows that the evaluation also requires measuring points from
the measuring point list after the equivalence point as well.
For the recognition of the EPs found, the set EP criterion is compared with
the ERC (Equivalence point Recognition Criterion) found. The ERC is the first
derivative of the titration curve combined with a mathematical function
which is more sensitive for flat jumps than for steeper ones. EPs whose ERC
is smaller than the set EP criterion will not be recognized.
Commands
Depending on the measured value one of the following four DET commands
can be selected:
￭ DET pH
Potentiometric pH measurement with pH electrodes (measured quantity
pH).
￭ DET U
Potentiometric voltage measurement with metal electrodes (measured
quantity voltage U).
￭ DET U
Voltametric measurement with selectable polarization current (measured
quantity voltage U).
￭ DET Upol
Amperometric measurement with selectable polarization voltage (meas-
ured value current I).
5.6.3.2.2 DET pH
5.6.3.2.2.1 DET pH - Overview
Dialog window: Method ▶ DET pH ▶ Properties.. ▶ DET pH - 'Command name'
Command for dynamic equivalence point titrations with potentiomet-
ric pH measurement.
Devices
This command can be executed with the following devices:
Titrando: 808, 809, 835, 836, 857, 888, 904, 905, 906, 907
Titrino: 716, 721, 736, 751, 785, 794, 798, 799
Robotic Titrosampler: 855
Appearance
The command has the following appearance: