Abstract

A method is described which allows a single-pulse analysis of photoacoustic signals. Isotope specific excitation of D₂S and HDS is performed with a TEA CO₂ laser, and the concentration change of the two species caused by H-D exchange after fast mixing of H₂S and D₂S is monitored. No influence of the laser radiation on the exchange reaction could be detected. Thus the progress of an independent chemical reaction was analyzed by a concentration measurement. The time resolutions is determined by the repetition rate of the laser.

© 1982 Optical Society of America

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