Metrohm 761 Compact IC - 3.4 Sample Determination

3.1 Requirements
761 Compact IC
53
3 Operating tutorial
This section introduces you to the operation of the 761 Compact IC by
means of a brief operating tutorial which describes the basic operat-
ing steps needed for the recording of an ion chromatogram using one
of the system files supplied.
The determination of the anionic content of a drinking water sample
with the METROSEP Anion Dual 2 column with chemical suppression
is used an illustrative example. Please note that the steps and pa-
rameter settings described apply only to this example. If you use a
different separating column and system file, the procedures described
in the tutorial must be modified appropriately.
For further explanations of the operation, please refer to section 4.
3.1 Requirements
For the determination of anions in drinking water described in this tuto-
rial, the following instruments, accessories and solutions are required:
• 2.761.0020 Compact IC
with suppressor module
• 6.1825.210 Sample loop (20 µL, PEEK)
already integrated in the 2.761.0020 Compact IC
• 6.1006.100 IC anion column METROSEP Anion Dual 2
• Eluent
2 mmol/L NaHCO
3
/ 1.3 mmol/L Na
2
CO
3
in dist. H
2
O
flow: 0.8 mL/min
• Standard
Standard solution with 0.5 mg/L F
–
, 5 mg/L Cl
–
and
10 mg/L each of NO
3
–
and SO
4
2–
(in dist. H
2
O)