10 ppt SF6 in ultrapure air
Manufacturers of calibration gas mixtures demand detectors with the highest sensitivity, selectivity, and ease of use. SF6, a popular tracer in ambient air quality monitoring, is usually detected with a radioactive ECD (electron capture detector). This chromatogram demonstrates the superior performance of the PDD - performance that makes it an excellent choice for analyzing electron capturing impurities in gases meant for ECDs.
Courtesy of Scott-Marrin, Inc., John Marrin, president
| Run conditions | |
|---|---|
| Sample | 10 ppt SF6 in ultrapure air |
| Sample volume | 1 ml, injection valve |
| Detector mode | Electron capture |
| Discharge gas | Helium @ 30 ml/min |
| Dopant gas | 5% methane in helium, 2 ml/min |
| Detector temp | 40°C |
| Column | 4' x 1/8" OD molecular sieve 5Å packed column |
| Column temp | Ambient, isothermal |
| Attenuation | 2 x 10-1 |
