Metrohm viva 1.0 (process analysis) - Manual (Page 409)

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5 Method
viva 1.0 (for Process analysis)
￭￭￭￭￭￭￭￭ 397
Devices
This command can be executed with the following devices:
Voltammetry: 894
Appearance
The command has the following appearance:
Principle
In the CVS (Cyclic Voltammetric Stripping) measuring mode, the potential
is changed once or more from the start potential to the vertex potential 1,
then to the vertex potential 2 and back to the start potential again at a
constant potential sweep rate. In this process, the current i is measured as
a function of the potential U.
t(i)
U
start
U
1
U
step
t
step
U
2
i
an
i
cath
U
U
t
U
step
Potential step (see Chap-
ter 5.5.2.3.2.4, page 407)
t
step
Potential step time (see
Chapter 5.5.2.3.2.4, page
407)
U
start
Start potential (see
Chapter 5.5.2.3.2.4, page
407)
U
1
1st vertex potential (see
Chapter 5.5.2.3.2.4, page
407)
U
2
2nd vertex potential
(see Chapter 5.5.2.3.2.4,
page 407)
i
an
Anodic current
i
cath
Cathodic current
Sequence of individual steps
In the CVS command, the following individual steps are successively exe-
cuted in the method run for the device defined in the command: