TY - JOUR
AU - Gillispie, Gregory D.
AB - We have developed and begun to field test a very sensitive method for real-time measurements of single-ring aromatic hydrocarbons in ambient air. In this study, we focus on the efficient 1 + 1 resonance enhanced multiphoton ionization (REMPI) of the BTEX species in the narrow region between 266 and 267 nm. We particularly emphasize 266.7 nm, a wavelength at which both benzene and toluene exhibit a sharp absorbance feature and benzene and its alkylated derivatives all absorb. An optical parametric oscillator system generating 266.7 nm, a REMPI cell, and digital oscilloscope detector are mounted on a breadboard attached to a small cart. In the first field test, the cart was wheeled through the various rooms of a chemistry research complex. Leakage of fuel through the gas caps of cars and light trucks in a parking lot was the subject of the second field test. The same apparatus was also used for a study in which the performance of the REMPI detector and a conventional photoionization detector were compared as a BTEX mixture was eluted by gas chromatography. Among the potential applications of the methodology are on-site analysis of combustion and manufacturing processes, soil gas and water headspace monitoring, space cabin and building air quality, and fuel leak detection.
TI - Real-time monitoring of BTEX in air via ambient-pressure MPI
JF - Proceedings of SPIE
DO - 10.1117/12.308382
DA - 1998-05-15
UR - https://www.deepdyve.com/lp/spie/real-time-monitoring-of-btex-in-air-via-ambient-pressure-mpi-8W0NeEIETq
SP - 216
EP - 225
VL - 3270
IS - 1
DP - DeepDyve
ER -