Metrohm 746 VA Trace Analyzer - Manual (Page 146)

4.6 Basic method for DPASV
746 VA Trace Analyzer / 747 VA Stand
4-61
4.6 Basic method for DPASV
This illustrative method can be used to investigate a sample for sub-
stances which can be determined with DPASV (Differential Pulse
Anodic Stripping Voltammetry) at the hanging mercury drop electrode
(HMDE). The basic structure for DPASV contained in the method can
then be modified and expanded in any way whatever for the specific
determination of one or more substances.
So that you can perform this example, first the 746 VA Trace Analyzer
and 747 VA Stand must have been prepared as described in section
4.1.
4.6.1 Reagents
The following solutions are needed to perform the method ASV.mth :
1 Acetate buffer 1 mol/L, pH 4.6
4.6.2 Loading the method ASV.mth
To load the method ASV.mth from the method memory into the working storage,
the following steps are necessary:
1 Switch on instrument
• Switch on the 746 VA Trace Analyzer with mains switch 11 11 at the rear of
the instrument. The instrument is initialized. If all is in order, the dialog
page "MONITORING" appears after a few seconds.
2 Switch to dialog page "METHODS"
• Press the yellow key. The "METHODS" dialog page ap-
pears showing the methods stored in the instrument.
3 Selection of the method ASV.mth
• Use the cursor keys to select the method
ASV.mth
, which then be-
comes black-backed.
4 Copying the method ASV.mth to the working storage
• Press the softkey . The softkey bar changes and presents the
destinations for copying the selected method.
• Press the softkey . The method ASV.mth is copied to
the working storage.