Agilent Technologies 1220 Infinity II LC User Manual page 249

Cleaning the Solvent Filter
When If solvent filter is blocked
Parts required Description
Concentrated nitric acid (65 %)
Bidistilled water
Beaker
Preparations Remove solvent inlet tube from the inlet valve.
1 Remove the blocked solvent filter from the bottle-head assembly and place
2 Thoroughly flush the filter with LC grade water (remove all nitric acid,
3 Reinstall the filter.
1220 Infinity II LC System User Manual
it in a beaker with concentrated nitric acid (65 %) for one hour.
some columns can be damaged by concentrated nitric acid; check with pH
indicator).
Maintenance and Repair
Solvent Delivery System
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