9 December 1999 Online diode-array UV spectroscopy of sulfur and nitrogen compounds
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On-line real-time monitoring of the gas-phase concentrations of sulfur containing molecules such as sulfur dioxide (SO2), hydrogen sulfide (H2S), carbon disulfide (CS2) and nitrogen containing molecules such as nitric oxide (NO), nitrogen dioxide (NO2), nitrous oxide (N2O) and ammonia (NH3) is of major importance in pollution monitoring and reduction and in the optimization of many gas-phase industrial processes. A UV optimized non-solarizing fiber-optic based diode-array analyzer system utilizing a 10,000 hour MTBF Xenon pulsed source has been developed and proven on-line. An on-board chemometric prediction engine allows for the simultaneous multi-component analysis of measured spectra of sample gases in real-time. Fiber-optic coupling of the analyzer to the gas flow cell housed within the sampling system allows intrinsically safe measurement to be carried out on samples gases at temperatures up to 310 C and pressures to 60 barg. Detection sensitivity down to ppm levels have been realized including such measurement applications as NH3, NO and H2S monitoring.
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Richard D. Driver, Richard D. Driver, Israel M. Stein, Israel M. Stein, } "Online diode-array UV spectroscopy of sulfur and nitrogen compounds", Proc. SPIE 3859, Optical Online Industrial Process Monitoring, (9 December 1999); doi: 10.1117/12.372936; https://doi.org/10.1117/12.372936

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