Chemiluminescent detection of reduced sulfur compounds with ozone
With the aim of developing a simple, sensitive, selective real-time method for measurement of reduced sulfur gases, we have investigated the chemiluminescent detection of H/sub 2/S, DMS, and other reduced sulfur compounds by their oxidation with ozone. The observation of chemiluminescence in the 300 to 400 nm wavelength region resulting from the gas-phase reaction of O/sub 3/ with H/sub 2/S, DMS, and methyl mercaptan (C-H/sub 3/SH) has been identified as electronically excited SO/sub 2/. The homogeneous gas-phase reaction of ozone with hydrogen sulfide has been reported to be slow in studies at low pressures and the oxidation mechanism is apparently complex. A reaction order for H/sub 2/S from 0.5 to 2 has been observed, and a heterogeneous reaction pathway has been proposed as a possible explanation of the data. Reported here are results of a preliminary investigation of the ozone-reduced sulfur chemiluminescence, which also imply a complex reaction mechanism (possibly both homogeneous and heterogeneous) but indicate that ozone chemiluminescence may be an extremely useful tool for the detection of H/sub 2/S, DMS, and other reduced sulfur species in the ambient atmosphere and in industrial applications.
- Research Organization:
- Brookhaven National Lab., Upton, NY
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 5179675
- Journal Information:
- Anal. Chem.; (United States), Vol. 55:1
- Country of Publication:
- United States
- Language:
- English
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