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- W1981839704 abstract "A quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor system was developed for the sensitive detection of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) using its absorption transitions in the v6 fundamental band near 7.73 μm. The recent availability of distributed-feedback quantum cascade lasers (DFB-QCLs) provides convenient access to a strong H<sub>2</sub>O<sub>2</sub> absorption line located at 1295.55 cm<sup>-1</sup>. Sensor calibration was performed by means of a water bubbler that generated titrated average vapor concentrations. A minimum detection limit of 75 parts per billion (ppb) was achieved at a pressure of 80 torr for a 1 sec data acquisition time. The long-term repeatability and stability of the sensor was investigated by measuring time-varying H<sub>2</sub>O<sub>2</sub> mixtures for ~2 hrs. An Allan deviation analysis was performed to investigate the long-term performance of the QEPAS sensor system, indicating the feasibility of a minimum detection limit of 12 ppb using the optimum data averaging time of 100 sec." @default.
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- W1981839704 date "2013-12-18" @default.
- W1981839704 modified "2023-10-17" @default.
- W1981839704 title "Quantum cascade laser-based sensor system for hydrogen peroxide detection" @default.
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- W1981839704 doi "https://doi.org/10.1117/12.2039557" @default.
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