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• HPLC-grade (or better) methanol
• HPLC-grade (or better) water
• Aluminium oxide powder
• HPLC-grade acetone
• Dichloromethane (DCM)
• 1:1 acetone/dichloromethane (DCM)
• Sonicator
• Oil-free nitrogen gas
To clean the lenses:
Warning:
To avoid personal contamination with biologically hazardous, toxic, or corrosive
materials, and to avoid spreading contamination to uncontaminated surfaces, wear clean,
chemical-resistant, powder-free gloves when performing this procedure.
Warning:
To avoid eye injury, use eye protection when performing this procedure.
Attention:
To avoid damaging the spacers, do not clean the spacers using this
procedure. You do not need to clean the spacers.
1.
Apply a fine abrasive using a cotton swab, and apply gentle pressure to remove
discoloration.
Tip:
Make the abrasive by adding a little methanol to aluminium oxide powder to form a
paste.
2.
Remove surplus abrasive by rinsing with methanol or water.
Tip:
If the methanol does not remove all of the abrasive, immerse the components in a
beaker of distilled water and sonicate for five minutes.
3.
Sonicate the component for 15 minutes in each of the following solvents, in order, using a
clean beaker for each solvent:
• Methanol – If the methanol is cloudy after the first wash, repeat using a clean beaker of
methanol before proceeding.
• Acetone – If acetone is unavailable, use methanol again.
• 50:50 acetone/dichloromethane (DCM). If DCM is unavailable, wash with hexane.
• DCM – If DCM is unavailable, wash with hexane.
Tip:
Do not use acetone as the final wash solvent because it leaves a residue that can
cause discharging during instrument operation.
4.
Dry all source components in an oven, or blow-dry them with oil-free nitrogen.
April 27, 2020, 715005564 Ver. 01 (previously released as Rev. A)
Page 85
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