VICI D-2-I - Manual (Page 31)

27
ECD Mode
Detector temperature: 50 C
Discharge gas flow-rate: 32 mL/min
0.1
Bac
kgr
ound
bias
voltage
V0
(V)
Dopant Flow-rate (3% Xe, mL/min)
0.0 7.0
10
1
1.0 2.0 3.0 4.0 5.0 6.0
Iw = 20 nA
Iw = 10 nA
ECD Mode
Detector temperature: 50 C
Discharge gas flow-rate: 32 mL/min
Sample: 50 ppb freon-11
2 l loop
0.001
Peak Height (V)
Dopant Flow-rate (3% Xe, mL/min)
0.0 7.0
100
0.01
0.1
10
1.0 2.0 3.0 4.0 5.0 6.0
Iw = 20 nA
Iw = 10 nA
1
Figure 7: Effect of 3% Xe dopant flow-rate on background voltage (V0) and ECD response
Mode Selection and Setup