4.20 Cleaning or replacing the corona pin
Required materials
• Chemical-resistant, powder-free gloves
• Needle-nose pliers
• HPLC-grade methanol
• Lint-free tissue
• Lapping film
• Corona pin
To clean or replace the corona pin:
Warning:
To avoid personal contamination with biologically hazardous, toxic, and corrosive
materials, wear chemical-resistant, powder-free gloves when performing this procedure.
Warning:
To avoid burn injuries, exercise care when handling the column or other
components heated to high temperatures. Wait until the hot components have
sufficiently cooled before you handle them.
Warning:
To avoid puncture injuries, handle sample needles, syringes, fused silica
lines, and borosilicate tips with extreme care.
1. Remove the corona pin from the source (see
Removing the corona pin from the source
).
2. Replace the corona pin if it is deformed or damaged. Otherwise clean its tip with the
lapping film, and then wipe it clean with a methanol-saturated tissue.
Warning:
To avoid spreading contamination with biologically hazardous, toxic, and
corrosive materials, dispose of all waste materials according to local environmental
regulations.
3. If you are replacing the corona pin, dispose of the old pin in accordance with local
environmental regulations.
4. Install the corona pin in the source (see
Installing the corona pin in the source (Page 65)
).
January 10, 2022, 715006200 Ver. 01 (previously released as Rev. A)
Page 129