Assembling The Inner Source After Cleaning - Waters Xevo TQ-GC Overview And Maintenance Manual

3. Sonicate the component for 15 minutes in each of the following solvents, in order, using a
clean beaker for each solvent:
• For EI operation:
• 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.
• For CI operation:
• 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.
• Dichloromethane (DCM).
Tip:
Do not use acetone as the final wash solvent because it leaves a residue that can
cause discharging during instrument operation.
4. To dry the components:
• For EI operation, bake the components at 200°C for 30 minutes or blow-dry them with
oil-free nitrogen.
• For CI operation, bake the components at 200°C for 30 minutes.
Tip:
If a component is not reinstalled immediately, store it in a desiccator. Doing so
prevents moisture adsorption and reduces equilibration time when the source is installed.
Warning:
corrosive materials, dispose of all waste materials according to local environmental
regulations.
5. Assemble the inner source components (see

4.7.3 Assembling the inner source after cleaning

Required materials:
• Chemical-resistant, powder-free gloves
To avoid spreading contamination with biologically hazardous, toxic, and
April 27, 2020, 715005564 Ver. 01 (previously released as Rev. A)
Assembling the inner source after
Page 70
cleaning).