Concentration determination of a binary mixture of air and carbon disulfide gas using optoacoustics

The optoacoustic effect has been used to study the concentration of gaseous carbon disulfide in a binary mixture with air. A 1.25-MW nitrogen laser having a wavelength of 337 nm and pulse duration of 800 ps was used as the optoacoustic source. Microphones and a laser Doppler vibrometer were used to detect the optoacoustic signal. Several test cells were used to investigate optoacoustic signals in order to detect the presence and concentration of a gas in a binary mixture with air in open and closed cell environments.