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Images of pH probe
The left image below shows the pH probe located for storage and calibration. A cup has
been placed in the cup holder.
The right image below shows the pH flow cell for operation.
Off-line pH calibration
The table below describes how to calibrate the pH probe.
Always have one end of the grounding strip submerged in the buffer during
calibration.
Note:
Action
Step
Prepare two cups with buffers representing the actual required pH range.
1
Place the cup with the highest pH solution in the cup holder. Insert the pH
probe into the holder, with the end submerged in the buffer.
Note:
Attach the cap to the pH flow cell to prevent foreign objects from entering
the flow path.
2
Select System:Calibrate in UNICORN System Control module.
3
Enter the pH value for the first buffer (with the highest pH solution) in the
Reference value 1 field, wait for the value to stabilize, and press Read value
1.
4
Remove the pH probe from the holder and rinse it with distilled water.
5
ÄKTAprocess Operating Instructions 29-0252-49 AA
149
6 Maintenance
6.5 Calibration of pH probe
Содержание AKTAprocess
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