| Autor: |
Olsson, Bo E. R., Davidsson, Jan, Hallquist, Mattias, Ljungström, Evert |
| Zdroj: |
Applied Spectroscopy; August 1995, Vol. 49 Issue: 8 p1103-1106, 4p |
| Abstrakt: |
An experimental setup for kinetic and product studies in a flow system has been developed. For detection, a nonresonant optoacoustic technique combined with a tunable lead-salt diode laser has been employed. The performance of the system was tested on ammonia in argon, and a detection limit (S/N = 2) of 8 × 1012molecules cm−3(corresponding to 320 ppb at atmospheric pressure) was obtained at a pressure of about 7 kPa when frequency modulation was employed. At 1.5 kPa the detection limit was about 2 × 1014molecules cm−1. With a multipass cell the sensitivity was increased by a factor of four. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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