A quartz-enhanced photoacoustic spectroscopy sensor system was developed for the sensitive detection of hydrogen peroxide (H2O2) using its absorption transitions in the v6 fundamental band at 7.73 lm. The recent availability of distributed-feedback quantum cascade lasers provides convenient access to a strong H2O2 absorption line located at 1295.55 cm1. Sensor calibration was performed by means of a water bubbler that generated titrated average H2O2 vapor concentrations. A minimum detection limit of 12 parts per billion (ppb) corresponding to a normalized noise equivalent absorption coefficient of 4.6109 cm1W/Hz1/2 was achieved with an averaging time of 100 s.
|Titolo:||Hydrogen peroxide detection with quartz-enhanced photoacoustic spectroscopy using a distributed-feedback quantum cascade laser|
|Data di pubblicazione:||2014|
|Digital Object Identifier (DOI):||10.1063/1.4863955|
|Appare nelle tipologie:||1.1 Articolo in rivista|