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.
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 | |
