30 ppb Vinyl Chloride in Nitrogen
Vinyl chloride is widely used in the manufacture of many types of plastic and vinyl materials. A PDD in the argon photoionization mode is the ideal choice for monitoring its concentration in ambient air. In the argon mode, the detector is "blind" to the air matrix but can "see" (ionize) vinyl chloride. This chromatogram illustrates the certification of a custom blend of 30 ppb vinyl chloride in nitrogen, demonstrating the PDD's sensitivity and reproducibility at low levels.
Courtesy of Scott-Marrin, Inc., John Marrin, president
| Run conditions | |
|---|---|
| Sample | 30 ppb vinyl chloride in nitrogen |
| Sample volume | 250 µl, external loop injection valve |
| Detector mode | Argon photoionization |
| Discharge gas | 1.5% Ar (mole) in helium @ 30 ml/min |
| Dopant gas | None |
| Detector temp | 40°C |
| Column | 100% dimethylpolysiloxane, 20 m x 0.053 mm |
| Column temp | Ambient, isothermal |
| Attenuation | 2 x 10 |
