Metrohm 746 VA Trace Analyzer - Manual (Page 398)

5.7.3 Alphabetical instruction list
746 VA Trace Analyzer / 747 VA Stand
5-247
Examples Determination of cadmium by stripping voltammetry:
Method ASV-1 .mth OPERATION SEQUENCE
Title Determination of cadmium
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Instructions t/s Main parameters Auxiliary parameters
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1 SMPL>M V.fraction mL V.total L
2 PURGE
3 STIR 300.0 Rot speed 2000 /min
4 (REP
5 PURGE
6 STIR 20.0 Rot speed 2000 /min
7 ØPURGE 5.0
8 SEGMENT Segm.name CdASV
9 REP)2 . .
10 END . .
Method ASV-1.mth SEGMENT
CdASV
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Instructions t/s Main parameters Auxiliary parameters
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1 HMDE Drop size 4 Meas.cell normal
2 DPMODE U.ampl 50 mV t.meas 20.0 ms
t.step 0.20 s t.pulse 40.0 ms
3 MEAS 60.0 U.meas -850 mV
4 ØSTIR 5.0
5 SWEEP 14.0 U.start -850 mV U.step 6 mV
U.end -450 mV Sweep rate 30 mV/s
6 END .
In the CdASV segment, cadmium is enriched at the HMDE for 60 s at
–850 mV and then determined in a sweep from –850 mV ... –450 mV.
see also ØMEAS, HMDE, TSWEEP, END