Figure 47. Apci Probe (Cross Section) - Thermo Scientific LTQ Series Hardware Manual

Flushing the Sample Transfer Line and Sample Tube
Thermo Scientific

Figure 47. APCI probe (cross section)

Ceramic
heater tube
APCI nozzle
To maintain the APCI probe, follow these procedures:
1. Flushing the Sample Transfer Line and Sample Tube
2. Removing the APCI Nozzle
3. Cleaning the APCI Nozzle
4. Removing the APCI Sample
5. Installing the New APCI Sample
6. Reassembling the APCI
You can minimize cleaning of the probe components by flushing the sample transfer line,
sample tube, and probe at the end of each work day (or more often if you suspect they are
contaminated). To remove contamination, use a 50:50 solution of LC/MS-grade methanol
and LC/MS-grade water, and flush the solution from the LC system through the API source
for approximately 15 minutes. For instructions, see
Sample Tube, and API Probe"
Vaporizer heater
cable socket
Sample tube
Tube, on page 76
Tube, on page 77
Probe, on page 78
"Flushing the Sample Transfer Line,
on page 49.
5
Maintenance
Ion Source Probe Maintenance
0.312 in. ID
O-ring
0.500 in. ID
Viton O-ring
APCI flange
fitting
LTQ Series Hardware Manual 73