Ren, WeiJiang, WenzheSanchez, Nancy P.Patimisco, PietroSpagnolo, VincenzoZah, Chung-enXie, FengHughes, Lawrence C.Griffin, Robert J.Tittel, Frank K.2017-06-142017-06-142014Ren, Wei, Jiang, Wenzhe, Sanchez, Nancy P., et al.. "Hydrogen peroxide detection with quartz-enhanced photoacoustic spectroscopy using a distributed-feedback quantum cascade laser." <i>Applied Physics Letters,</i> 104, no. 4 (2014) AIP Publishing LLC.: http://dx.doi.org/10.1063/1.4863955.https://hdl.handle.net/1911/94840A 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 μm. The recent availability of distributed-feedback quantum cascade lasers provides convenient access to a strong H2O2 absorption line located at 1295.55 cm−1. Sensor calibration was performed by means of a water bubbler that generated titrated average H2O2vapor concentrations. A minimum detection limit of 12 parts per billion (ppb) corresponding to a normalized noise equivalent absorption coefficient of 4.6 × 10−9 cm−1W/Hz1/2 was achieved with an averaging time of 100 s.engArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Journal articlehttp://dx.doi.org/10.1063/1.4863955