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Maintenance and care
AZURA® Detector DAD 6.1L, DAD 2.1L, MWD 2.1L Instructions, V6700
9.2.2 Surfaces
Device defect
Intruding liquids can cause damage to the device.
Place solvent bottles next to the device or in a solvent tray.
Moisten the cleaning cloth only slightly.
All smooth surfaces of the device can be cleaned with a mild, commerci-
ally available cleaning solution, or with isopropanol.
Display screens can be cleaned with isopropanol and should be wiped
dry with a soft, lint-free cloth.
9.3 Cleaning the flow cell
Increased noise of the baseline and reduced sensitivity can be a result of
a dirty flow cell. Often it is sufficient to rinse the flow cell to restore opti-
mal sensitivity.
Note:
In the case of using acetonitrile or mixtures containing acetonitrile
as mobile phase in combination with the LightGuide flow cells it is neces-
sary to clean the flow cell in regular intervals for maintaining the perfor-
mance of the cell. For this purpose flush the flow cell every 24 h for at
least 1 h with pure methanol at 1 ml/min. Please remove your installed
column for this flush step.
9.3.1 Basic cleaning
The following solvents are recommended for rinsing:
dilute HCl (1 mol/L)
1 mol/L NaOH aq.
Ethanol
Acetone
Syringe
Performance decrease
For the drying step, oil drops from compressed air can contaminate the
flow cell which may result in performance decrease.
Do not use compressed air for drying.
Process
Steps
1.
Fill the syringe with eluent.
2.
Inject it into the inlet of the flow cell and allow it to act for
3.
Repeatedly flush with syringe and water.
4.
Remove the flow cell from the detector and use a nitrogen stream
to dry it.
Display
Tools
