Atmospheric detection and discrimination of NO and NO/sub 2/ by laser spectroscopy

Summary form only given. There is a growing interest in laser-based analytical techniques for remote or in situ trace detection of NO/sub x/ (NO+NO/sub 2/) pollutants. In the present study, we employ a single 454-nm laser to detect trace NO and NO/sub 2/ concentrations at atmospheric pressure. NO is detected using miniature electrodes by (2+2) resonance-enhanced multiphoton (REMPI) processes, while NO/sub 2/ is detected using a miniature microphone by photoacoustic spectroscopy.