Agilent Technologies 990 - Page 152

11 Micro GC Natural Gas Analyzer
Natural Gas Analyzer A and the A Extended Version
152 Agilent 990 Micro GC User Manual
8 meter CP-Sil 5 CB
The 8 meter CP-Sil 5 CB channel of the Natural Gas Analyzer A Extended is used for the analysis of
hydrocarbons from n-hexane up to n-dodecane.
The NGA Gas Calibration standard and the Universal Gas Calibration standard do not contain
heavy hydrocarbons up to n-dodecane. Reference chromatograms of the NGA Gas Calibration
standard and the Universal Gas Calibration standard are included in this manual. For heavy
hydrocarbons up to n-dodecane an additional sample is analyzed for identification.
Analysis of the NGA Gas Calibration standard results in the chromatogram shown in Figure 74.
Reference check of the Universal Gas Calibration standard results in a chromatogram similar to
Figure 75.
Figure 74. NGA Gas Calibration standard analyzed with the 8 meter CP-Sil 5 CB channel on Analyzer A Extended
Seconds
15
20 25 30 35 40 45 50 55
mV
0
5
10
15
n-Hexane
Figure 75. Universal Gas Calibration standard analyzed with the 8 meter CP-Sil 5 CB channel on Analyzer A Extended
Seconds
15
20 25 30 35 40 45 50 55
mV
0.0
2.5
5.0
7.5
n-Hexane
n-Heptane