Metrohm 746 VA Trace Analyzer - Manual (Page 131)

4 Introduction to the operation
746 VA Trace Analyzer / 747 VA Stand
4-46
• Press the softkey < >> > to switch to the main page "Substance pa-
rameters". Then press the softkey <Select subst.> . The two substances
Pb and CdRef are shown on the softkeys.
• Press the softkey <CdRef> to select the internal standard cadmium. The
dialog page "SUBSTANCES" appears with the parameters for evaluation
of the reference substance cadmium. It is identical to that of the
TESTPb.mth method except for the characteristic voltage U.verify
(–580 mV) and will thus not be discussed further here (see section 4.2.3).
• Press the softkey < >> > . The subpage with the parameters for the
reference substance cadmium appears:
Method: INTSTD SUBSTANCES
CdRef - DPASV
Calibration 1996-12-16 14:23
ДДДДДДДДДДДДДДДДДДДДДДДДДДДДДД ДДДДДДДДДДДДДДДДДДДДДДДДДДДДДД
Technique int std.
Mode referen.
Temperature 20.0 °C
Soln.name CdRefSol
Mass.conc. 1 mg/L
Modify
column
Modify
line
Select
subst.
Link to
segment
Delete
subst.
Subst.
name
>>
• The following is a brief explanation of the most important parameters:
Technique Calibration technique: internal standard
Mode Mode for parameter display: reference (internal standard)
Temperature Temperature of the analysis solution: 20°C
Soln.name Name of the solution with the internal standard: CdRefSol
Mass conc. Mass concentration of the solution with the internal
standard: 1 mg/L
4 Switch to dialog page "CALCULATION"
• Press the yellow <CALCULATION> key. The dialog page "CALCU-
LATION" appears for calculation of the final results. The mass concen-
tration of lead ( MC:Pb ) determined using the internal standard method is
put out as the result in g/L with 4 significant figures.
5 Switch to dialog page "DOCUMENTATION"
• Press the yellow <DOCUMENTATION> key. The dialog page "DOCU-
MENTATION" appears for the automatic output of reports and curves.
The two lines entered in the example have the following meaning: