Metrohm tiamo 2.1 (ProcessLab) - Manual (Page 553)

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tiamo 2.1 (ProcessLab) ￭￭￭￭￭￭￭￭ 537
V
EP
= EP volume, V
0
= total volume added before ∆
n
, ∆V = volume incre-
ment, ρ = interpolation factor according to Fortuin
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
sum of the measured value modifications before and after the jump:
|∆
n-2
|+|∆
n-1
|+|∆
n
|+|∆
n+1
|+|∆
n+2
|
(In certain cases, only three or only one summand is taken into account.) 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 MET com-
mands can be selected:
￭ MET pH
Potentiometric pH measurement with pH electrodes (measured quantity
pH).
￭ MET U
Potentiometric voltage measurement with metal electrodes (measured
quantity voltage U).
￭ MET Ipol
Voltametric measurement with selectable polarization current (measured
quantity voltage U).
￭ MET Upol
Amperometric measurement with selectable polarization voltage (meas-
ured value current I).
5.6.3.3.2 MET pH
5.6.3.3.2.1 MET pH - Overview
Dialog window: Method ▶ MET pH ▶ Properties... ▶ MET pH - 'Command name'
Command for Monotonic Equivalence Point Titrations with potentio-
metric pH measurement.
Devices
This command can be executed with the following devices:
Titrando: 808, 809, 835, 836, 857, 888, 904, 905, 906, 907
Titrino: 702, 716, 721, 736, 751, 785, 794, 798, 799
Robotic Titrosampler: 855
Appearance
The command has the following appearance: