Metrohm 761 Compact IC - Manual (Page 65)

3.3 Calibration
761 Compact IC
55
3.3 Calibration
After the complete IC system has been installed as described in sec-
tion 3.2, the first calibration can be started. A standard solution is re-
quired for this; it should contain the substances to be determined in
approximately the same concentrations in which they can be expected
in the sample.
In our example of drinking water determination using the METROSEP
Anion Dual 2 IC-anion column a 20 µ L sample loop is used; this is filled
with the following standard solution:
0.5
mg/L F –
5 mg/L Cl –
10 mg/L NO
3
–
10 mg/L SO
4
2–
(as Na + - or K + salts in dist. water)
Please note that all program displays refer to the condition in which the
system s-03.smt is loaded for the first time. If you want to work through
this tutorial at a later date and the system s-03.smt has been altered in
the meantime then differences with respect to the program display and
the parameter values may occur.
In the description of the calibration procedure it is assumed that the PC
and 761 Compact IC are not in operation and that the system must first
be conditioned again. If this is not the case (e.g. if you start the tutorial
immediately after conditioning) then you can skip steps 1 to 6.
1 Switch on 761 Compact IC
⇒ Switch on 761 Compact IC with mains switch 19 on the rear
of the instrument. After the instrument has been switched on
the mains pilot lamp 9 lights up.
2 Switch on PC
⇒ Switch on PC and start «761 Compact IC» program.
3 Open and connect system " PrepMSM2.smt "
⇒ Start PC program «761 Compact IC», if it is not already
running (see section 2.5.3).
⇒ Select File / Open / System in the main window. Select the
system file PrepMSM2.smt in the folder Suppressed and click on
<Open> .
⇒ Select Connect to workplace of the Control menu in the system
window.
4 Start system " PrepMSM2.smt "
⇒ Select Start determination of the Control menu in the system
window. High-pressure pump and peristaltic pump are
started, at the same time, a chromatogram window opens
where the baseline is recorded continuously. The suppressor