4 sample determination, 4 sample, Determination – Metrohm 790 Personal IC User Manual

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3 Operating tutorial

790 Personal IC

3.4 Sample

determination

Following the calibration of the IC system as described in section 3.3

the first sample solution can be injected.

1 Start determination

⇒ Click on

or select

Start determination

of the

Control

menu in the system window. An empty chromatogram win-

dow opens where the baseline is recorded continuously. The

message

Initialisation [790 COM#]

appears in the

SYSTEM

STATE

window. Then the

Edit

sample

description

window is

opened automatically.

2 Enter information for determination

⇒ Enter the desired information concerning the sample in the

Edit

sample

description

window and confirm with

. Set

Ca-

libration level

and confirm with

3 Switch injection valve to "FILL" position

⇒ Click on the

button of the 790 icon in the system

window to switch the injection valve to the "FILL" position. At

the same time, the suppressor module is switched to the next

position.

4 Fill sample loop

⇒ Immerse the aspirating tubing 23

23 in the vessel containing the

drinking water sample.

⇒ Using the syringe fixed to the syringe tubing 25

25, siphon in ca.

1 mL drinking water.