Selective real-time measurement of styrene vapor using a surface-acoustic-wave sensor with a regenerable organoplatinum coating.
Zellers-ET; Hassold-N; White-RM; Rappaport-SM
Anal Chem 1990 Jul; 62(13):1227-1232
The performance of a coated surface acoustic wave (SAW) sensor with a regenerable organoplatinum coating for monitoring styrene (100425) vapor was investigated. The effects of several organic cocontaminants and atmospheric humidity were described. The dual SAW delay line oscillator employed a reagent coating of trans- PtCl2(ethylene)(pyridine) to trap styrene via ethylene substitution. The rate of change of the sensor frequency was used to provide real time measurement of styrene vapor concentrations. No effect on the response to styrene was observed upon simultaneous exposure to each of several olefin and nonolefin solvent vapors used with styrene in industrial processes. Butadiene, however, presented a reversible negative interference by successfully competing with styrene for reaction with the trapping agent. The response to styrene exhibited a moderate positive humidity dependence. Following prolonged exposure, the original complex could be regenerated in-situ by exposure to ethylene gas, thereby permitting repeated use of the sensor. The authors conclude that the high degree of selectivity obtained with the described sensor represents an improvement over portable direct reading instruments currently used for monitoring styrene in the industrial environment.
NIOSH-Publication; NIOSH-Grant; Air-monitoring; Analytical-instruments; Analytical-chemistry; Chemical-analysis; Organic-vapors; Chemical-reactions; Analytical-methods; Monitoring-systems; Chemical-kinetics; Vapor-detectors
Environmental & Indust Health University of Michigan Dept of Environmental Hlth Ann Arbor, MI 48109-2029
University of Michigan at Ann Arbor, Ann Arbor, Michigan