Optoacoustic detection of sulphur dioxide below the parts per billion level

We report a novel optoacoustic detection scheme which is suited for use with low‐power radiation sources. The improved detection capability is demonstrated for SO2 with a frequency‐doubled dye laser of 1 mW uv output power, allowing the detection of SO2 concentrations as low as 0.12 ppb.

[1]  W. R. Wade,et al.  Measurements of SO2 absorption coefficients using a tunable dye laser , 1975 .

[2]  J. P. Bell,et al.  Preparation of known concentrations of gases and vapors with permeation devices calibrated gravimetrically , 1970 .

[3]  C. E. Hackett,et al.  Acoustic amplifier for detection of atmospheric pollutants , 1973 .

[4]  L. Rosengren,et al.  Characteristics of a resonant opto-acoustic gas concentration detector , 1974 .

[5]  G. Boyd,et al.  Parametric Interaction of Focused Gaussian Light Beams , 1968 .

[6]  N D Kenyon,et al.  Air Pollution: Sensitive Detection of Ten Pollutant Gases by Carbon Monoxide and Carbon Dioxide Lasers , 1972, Science.

[7]  T. F. Deaton,et al.  Absorption coefficient measurements of nitrous oxide and methane at DF laser wavelengths , 1975 .

[8]  R. Byerly.  New Developments in the Measurement of Gaseous Pollutants in Air , 1975, IEEE Transactions on Nuclear Science.

[9]  Roger D. Kamm,et al.  Detection of weakly absorbing gases using a resonant optoacoustic method , 1976 .

[10]  L. Rayleigh,et al.  The theory of sound , 1894 .

[11]  Kenya Goto,et al.  An acoustically resonant system for detection of low‐level infrared absorption in atmospheric pollutants , 1974 .

[12]  H. Mettee.  Fluorescence and Phosphorescence of SO2 Vapor , 1968 .

[13]  C. Patel,et al.  A new optoacoustic cell with improved performance , 1977 .

[14]  F. Schwarz,et al.  Fluorescence detection of sulfur dioxide in air at the parts per billion level. , 1974, Analytical chemistry.