A novel type of system based on a frequencyquadrupled Nd:YAG laser light source at 266 nm and a dual-cell photoacoustic detection unit was developed, and its applicability for ozone-concentration measurement with a minimum detectable ozone concentration of about 100 pptV was demonstrated. The instrument was calibrated against an ozone generator, and it was installed at a regional environmental monitoring station to be operated in parallel with a commercial UV-absorption photometry based ozonemonitoring instrument. While good agreement between the readings of the two systems was found, the photoacoustic system outperformed its optical absorption based counterpart as far as minimum detectable concentration and measurement accuracy is concerned.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)