Gilson VERITY 1910 MS User Manual page 53

Clean the vac‑chip
Use the following procedure to clean the vac-chip.
1. Remove the vac-chip. Refer to Remove the vac‑chip on page 50.
2. Prepare a small ultrasonic bath in a fume hood/suitable extracted area. Fill the bath with
room temperature water.
3. Prepare a clean test tube (20 mm oD) to ensure that when you place the vac-chip inside,
the face of the vac-chip will not touch any surfaces.
To avoid damaging the vac‑chip do not use different sized test‑tubes or other glassware
for cleaning.
WARNING
Do not heat the ultrasonic bath as this can damage the vac‑chip.
4. Tilt the test tube horizontally and carefully place the vac-chip just inside in the mouth of
the tube.
5. Slowly tilt the test tube vertically, allowing the vac-chip to slide slowly to the bottom of
the tube.
6. Pour enough HPLc-grade water into the test tube to cover the vac-chip.
7. Place the test tube in a suitable rack in the ultrasonic bath and sonicate for 10 minutes.
8. Remove the test tube from the bath and carefully pour most of the water away without
removing the vac-chip.
9. Refill the tube with HPLc-grade acetonitrile such that the vac-chip is submerged as before
and sonicate for 10 minutes.
10. Repeat steps 7–8 using HPLc-grade methanol.
11. carefully pour off the methanol.
12. Gently tip the vac-chip out into a shallow petri dish or on to lint-free tissue such that the
vac-chip can be easily picked up with tweezers.
13. Using flat tweezers carefully hold the vac-chip by pinching either side of the larger metal
ring (Figure 22).
14. Gently blow dry the vac-chip with compressed air or nitrogen. Remove as much excess
liquid as possible.
15. Place the vac-chip in an oven at 75°c for 30 minutes to completely dry it. If an oven is not
available, place the vac-chip on a lint-free tissue and leave for few hours to dry completely.
● If the vac-chip looks visually degraded or you have any questions, please contact
Gilson before using the vac-chip. Refer to Customer Service on page 12.
VERITY® 1910 MS DETEcToR
53
| USER'S GUIDE