5 Maintenance
Cleaning the capillary
Agilent Triple Quadrupole LC/MS System User Guide 116
Cleaning the capillary
Schedule
When you observe decreased sensitivity and decreased signal stability.
Equipment List
• Clean powder-free nitrile gloves
• LC/MS-grade isopropanol
• Alconox powdered precision cleaner
• Deionized (18 MΩ/cm) water
• 100-mL polypropylene graduated cylinder
• 10-mL polypropylene graduated cylinder
• Two 1-mL pipette tips
Steps
1 Put on clean, powder-free nitrile gloves.
2 Dissolve 1 gram of Alconox Powdered Precision Cleaner in 100 mL of
deionized (18 MΩ-cm) water. This concentration is the recommended
concentration for both manual or ultrasonic cleaning.
3 If you use a glass graduated cylinder, cover the end of the ion transport
capillary with a 1-mL pipette tip to protect the metalized plating.
4 Trim the pipette tip to approximately 4 cm so that the capillary can be
immersed in the cleaning solution.
5 Place the ion transport capillary upright in a graduated cylinder and fill with
Alconox Powdered Precision Cleaner solution.
6 Sonicate the graduated cylinder that contains the ion transport capillary in an
ultrasonic cleaner for 10 to 15 minutes. Do not clean longer than 15 minutes.
Sonication should be done under a fume hood.
7 Rinse the capillary and graduated cylinder several times with deionized water.
8 Fill the graduated cylinder with deionized water and sonicate for 10 to 15
minutes.
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