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5
Micro GC Channels
CP-Sil 5 CB columns
CP-Sil 5 CB columns
The natural gas components, mostly hydrocarbons, separate in the same order on the non-polar
and medium-polar CP-Sil CB columns. Nitrogen, methane, carbon dioxide, and ethane are not
separated on these columns. They produce a composite peak. For separation of these
components, consider a PoraPLOT U or HayeSep A column.
Table 16 CP-Sil 5 CB instrument parameters
Parameters
Column temperature
Injector temperature
Column pressure
Sample time
Injection time
Run time
Detector sensitivity
Peak 1
Peak 2
Peak 3
Peak 4
Peak 5
CP Sil 5 CB 4 m heated
mV
55
1 2
45
3
35
25
15
5
4
5
-5
0
5
10
15
66
4 m Heated
50 °C
110 °C
150 kPa (21 psi)
30 s
40 ms
30 s
Auto
Composite balance
Ethane 8.1 %
Propane 1.0 %
i-Butane 0.14 %
n-Butane 0.2 %
20
25
30
35
Seconds
CP Sil 5 CB 6 m heated
mV
34
1
2
3
29
24
19
14
9
5
4
4
-1
0
10
20
30
Agilent 990 Micro GC User Manual
6 m Heated
50 °C
110 °C
150 kPa (21 psi)
30 s
40 ms
30 s
Auto
Composite balance
Ethane 8.1 %
Propane 1.0 %
i-Butane 0.14 %
n-Butane 0.2 %
40
50
60
70
Seconds
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