Apci Probe Maintenance; Figure 46. Apci Probe - Thermo Scientific LTQ Series Hardware Manual

5
Maintenance
Ion Source Probe Maintenance

APCI Probe Maintenance

72 LTQ Series Hardware Manual
The APCI probe requires minimum maintenance. Occasionally, you must replace the internal
APCI sample tube (150 μm ID [0.006 in. ID], 390 μm OD [0.015 in. OD], and 8.6 cm
[3.4 in.] long fused-silica tubing) and clean the APCI nozzle.
CAUTION HOT SURFACE At operating temperatures above 350 °C (662 °F), the probe
and API source housing can severely burn you.
• Before removing the probe or API source housing, allow the part to cool to room
temperature (approximately 20 minutes) before touching it.
• If the mass spectrometer connects to an LC system, leave the solvent flow from the
LC pump on while the probe cools to room temperature.
Figure 46 and Figure 47

Figure 46. APCI probe

Vaporizer heater
Retention
flanges
show the major components of the APCI probe.
Guide pin
cable socket
Flat side on APCI
nozzle head
APCI nozzle
assembly
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