5 Micro GC Channels
CP-Sil 5 CB columns
66 Agilent 990 Micro GC User Manual
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 4 m Heated 6 m Heated
Column temperature 50 °C 50 °C
Injector temperature 110 °C 110 °C
Column pressure 150 kPa (21 psi) 150 kPa (21 psi)
Sample time 30 s 30 s
Injection time 40 ms 40 ms
Run time 30 s 30 s
Detector sensitivity Auto Auto
Peak 1 Composite balance Composite balance
Peak 2 Ethane 8.1 % Ethane 8.1 %
Peak 3 Propane 1.0 % Propane 1.0 %
Peak 4 i-Butane 0.14 % i-Butane 0.14 %
Peak 5 n-Butane 0.2 % n-Butane 0.2 %
-5
5
15
25
35
45
55
05
Seconds
mV
CP Sil 5 CB 4 m heated CP Sil 5 CB 6 m heated
12
3
4
5
10 15 20 25 30 35
-1
4
9
14
19
24
29
34
mV
Seconds
1
4
5
010 2030 4050 6070
3
2
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