Impurities in Hydrocarbon Feedstocks
Feedstock purity is a prime consideration in the polymer industry, since it determines the feedstock's quality and value. Detection and quantitation of minor impurities can be problematic, requiring complex column switching to prevent the matrix peak from overwhelming the detector. Since the PDD's discharge gas stream is separate from its carrier stream, the matrix peak never enters the discharge region; thus, the PDD recovers as soon as the peak elutes from the column, minimizing analysis time.
Courtesy of Dow Chemical, Canada
Western Canada Operations, Analytical Sciences, Jim Luong
| Run conditions | |
|---|---|
| Sample | 250 µl of a synthetic standard of hydrocarbons in ethylene |
| Detector mode | Helium photoionization |
| Discharge gas | Helium |
| Dopant gas | None |
| Detector temp | 100°C |
| Column | CP-Porabond Q, 25m x 0.53mm |
| Column temp | 600°C |
| Attenuation | 1 |
