Knauer Azura Detector UVD 2.1S, Инструкция по эксплуатации

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37 Maintenance and care
AZURA® Detector UVD 2.1S Instructions, V6820
8.5 Rinsing the flow cell
Increased baseline noise and reduced sensitivity can be a result of a
dirty flow cell. Often it is sufficient to rinse the flow cell to restore optimal
sensitivity.
Note: Dirty lenses or fiber optic connectors could falsify the measure-
ment. Do not touch the lens or the fiber optic connector lends with bare
hands. Wear gloves.
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Flow cell is removed from the detector.
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Waste tube is connected to the flow cell.
The following solvents are recommended for rinsing:
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Diluted HCl (1 mol/L)
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1 ml/L NaOH aq.
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Ethanol
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Acetone
Syringe
Procedure Process
1.
Fill the syringe with eluent.
2.
Inject it into the inlet of the flow cell and allow it to act for 5 minutes.
3.
Fill the syringe with water and inject again.
4.
Use a nitrogen stream to dry the flow cell.
The flow cell is rinsed.
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Check if the baseline noise has improved.
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If the rinsing does not have the desired effect, disassemble the flow
cell to clean the lens.
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.
Prerequisite
Solvents
Tools
Result
Next steps