SO2 Concentration In Air Research Articles

Analysis of SO2Concentration in Air by Microwave Spectroscopy

Abstract Low concentrations of SO2 in air were measured using a Stark modulated microwave spectrometer. Measurement of the intensity of absorption lines for rotational transitions gives a quantitative measure of the concentration of specific small molecules. Concentrations of 20 ppm of SO2 In air were easily detected with a signal-to-noise ratio of over 20/1 with a 5 sec time constant using a straightforward sample concentration technique.