Voltammetry - easier than ever
757 VA Computrace was the first PC-controlled voltammetry
system by Metrohm. The instrument is connected to the PC via the VA Computrace
Interface to a USB port of the PC. The 757 VA Computrace software 2.0
supports
Microsoft WindowsTM 2000 or WindowsTM
XP Professional and contains all the necessary operating elements. The clearly
arranged user interface comprises a Windows-oriented menu and a task bar that
can be clicked for control of the instrument, method development and the recording
and evaluation of the voltammograms.
Thanks to the sophisticated program design, only a few parameters must be entered
to create a method. For further simplification the instrument is preprogrammed
with all the methods that are described in the Metrohm Application Bulletins
and Metrohm Application Notes.
In order to make your work even easier we have made our application know-how
available on-line. On our website you can call up a wide range of application
information. Apart from the list of our Application
Bulletins you will also find more than 100 VA Application Notes, which contain
many interesting practical examples from our application laboratories. Sample
preparation to remove organic interferences from samples can be performed comfortably
with the 705
UV Digester.
Login with user access rights
Rights of access can be defined to keep operation as simple as possible
and avoid operator errors. The administrator can block individual program parts
for each operator. The time-proven Multi-Mode Electrode (MME) can be used as
the sensor or, for special applications; rotating disk electrodes can be brought
into play.
Applications
Trace analysis…
can be carried out using calibration curves or standard addition down to the
ppt level. Evaluation is automatic, can be controlled on the PC and the results
processed there. Different options for baseline approximation are available:
linear, polynomial, and exponential. Linear as well as non-linear calibration
techniques can be chosen. On the 757 VA Computrace it is also possible to carry
out automatic addition of auxiliary solutions like buffers or standards with
the help of 765 Dosimats. For full automation the 813
Compact Autosampler can be attached.
… and method creation as well as training:
A wide range of voltammetric techniques can be compared directly with one another
in the unique exploratory mode. The effects of altered parameters on the voltammogram
can be observed directly. This program part has been designed specially for
training in electrochemistry and also helps in developing the optimum method
for solving an analytical problem. A Metrohm Monograph comprising a collection
of 13 basic experiments for training in voltammetry is available to provide
assistance in setting up training courses.
Curves and results are clearly shown beside each other in a program window.
The results are printed out in preconfigured protocols, which can be exported
to standard text
and
spreadsheet
programs such as Word and Excel.
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