Natural Gas Liquid (NGL)

Natural gas analysis typically utilizes a flame ionization detector (FID). Such an analysis is shown in the lower chromatogram (attenuation x 4). The upper chromatogram was generated with a PDD in the helium photoionization mode (attenuation x 8). These chromatograms demonstrate the similarity in performance between the two detectors. The PDD offers comparable performance without the use of a flame or combustible gases.

Natural gas liquid NGL

Courtesy of Phillips Petroleum Co., Nak J. Sung, Research Chemist

Run conditions
Sample Natural gas liquid (NGL)
Sample volume 0.5 µl, 100:1 split
Injector temp 200°C
Detector mode Helium photoionization
Discharge gas Helium @ 30 ml/min
Dopant gas None
Detector temp 280°C
Column 100% dimethylpolysiloxane, 60 m x 0.32 mm x 1 µm
Column temp 60°C for 2 min, to 200°C at 10°C/min
Attenuation PDD 8 x 1
FID 4 x 1