Trace Impurities in Bulk Gases
Trace level detection of impurities in inorganic gases is crucial for the bulk gas and semiconductor industries. Analysis of impurities in hydrogen is traditionally performed in conjunction with a palladium diffusion tube to eliminate the bulk hydrogen peak. This analysis, performed on a Valco Trace Gas Analyzer (TGA) equipped with the PDD, eliminates the palladium tube and highlights the sensitivity and stability (fast recovery from the bulk peaks) of the PDD.
| Run conditions | ||
|---|---|---|
| Sample | 250 µl of 2 ppm permanent gas blend in bulk hydrogen | |
| Detector mode | Helium photoionization | |
| Discharge gas | Helium | |
| Dopant gas | None | |
| Detector temp | 100°C | |
| Column | Heartcut | Molesieve 5Å, 10' x 1/8" |
| Analysis | Molesieve 5Å, 10' x 1/8" | |
| Column temp | 100°C | |
