Ph Valve And Ph Monitor - GE AKTA avant User Manual

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Table of Contents

3 Standard instrument modules

3.9 pH valve and pH monitor

Function of the pH valve

The pH valve is used to direct the flow to a pH electrode installed in the integrated flow

cell when inline monitoring of pH is desired during a run. The pH valve is labeled V9-pH

for ÄKTA avant 25 and V9H-pH for ÄKTA avant 150. The Flow restrictor is also mounted

on the pH valve. The Flow restrictor gives a small back pressure which prevents air

bubble formation in the detector flow cells. It is recommended to have it selected inline.

The valve directs the flow to the pH electrode and to the Flow restrictor, or by-passes

one or both.

Location and illustration of pH

The following illustration shows the location of the pH valve, and also an enlargement

of the valve. In ÄKTA avant 25, the pH valve is labelled V9-pH. In ÄKTA avant 150, the pH

valve is labelled V9H-pH.

pH flow cell

pH electrode

Flow restrictor

ÄKTA avant User Manual 29035184 AE