Varian 450-GC, User Manual

Page: 111 / 205

1177 Split/Splitless Capillary Injector - Injectors
Varian, Inc. User Manual 450-GC Page: 173
Injector body cleaning
To clean the Injector body, proceed as follows:
1. Set the column oven temperature to 45
°
C and the 1177 Injector
temperature to 50
°
C. Wait for the zones to reach their set temperatures
and then turn the column oven off by unchecking the checkbox “Power”
located in the Oven screen .
2. Use the 5/16” open-end wrench to loosen the capillary column nut.
3. By hand, carefully withdraw the fused silica column and nut from the
Injector assembly. Set the column nut and column end on the floor of the
GC oven.
Use proper eye and skin protection. Methanol and acetone are toxic and
flammable chemicals. Exercise appropriate precautions when these chemicals
are used.
4. Remove the Injector nut, septum and top of Injector.
5. Remove the Insert.
6. Moisten a cotton swab and a stick with methanol and gently swab center of
the Injector body.
7. Moisten a cotton swab on a stick with iso-octane and gently swab the
center of the Injector body.
8. Replace the insert, seal, Injector top, septum and Injector nut.
9. Examine the end of the fused silica column to ensure that it has not been
damaged. Slide the end of the fused silica column into the opening of the
Injector.