title: High-sensitivity detection of hazardous SO(2) using 266 nm UV laser.
abstract: Pulsed laser resonant photoacoustic spectroscopy was applied for detection of highly toxic SO(2) with 266 nm as the excitation source. An extra-cavity longitudinal resonant cell, was designed and fabricated to enhance the sensitivity of the system, which is capable of detecting the trace amount of SO(2). As a process of signal-to-noise ratio optimization, the parametric dependence of the PA signal was carried out and the sensitivity achieved with our system was as low as 4 ppb, which is considered to be a sufficient level for the detection of ambient SO(2) in the atmosphere. This study could be an antecedent for the design of a portable SO(2) sensor.
authors.affiliation: Laser Research Laboratory, Physics Department, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia. magondal@kfupm.edu.sa
authors.forename: Mohammed A
authors.initials: MA
authors.lastname: Gondal
authors.forename: Mohamed A
authors.initials: MA
authors.lastname: Dastageer
mesh_terms: D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods; D007834:Lasers; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet / Q000295:instrumentation* / Q000379:methods; D013458:Sulfur Dioxide / Q000032:analysis*
chemical_list: D013458:Sulfur Dioxide