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11 results on '"Sampaolo A"'

1. Environmental Monitoring of Methane with Quartz-Enhanced Photoacoustic Spectroscopy Exploiting an Electronic Hygrometer to Compensate the H2O Influence on the Sensor Signal

Author

Arianna Elefante, Giansergio Menduni, Hubert Rossmadl, Verena Mackowiak, Marilena Giglio, Angelo Sampaolo, Pietro Patimisco, Vittorio M. N. Passaro, and Vincenzo Spagnolo

Subjects
quartz-enhanced photoacoustic spectroscopy, methane, hygrometer, relaxation promoter, environmental monitoring, Chemical technology, TP1-1185
Abstract

A dual-gas sensor based on the combination of a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor and an electronic hygrometer was realized for the simultaneous detection of methane (CH4) and water vapor (H2O) in air. The QEPAS sensor employed an interband cascade laser operating at 3.34 μm capable of targeting a CH4 absorption line at 2988.8 cm−1 and a water line at 2988.6 cm−1. Water vapor was measured with both the electronic hygrometer and the QEPAS sensor for comparison. The measurement accuracy provided by the hygrometer enabled the adjustment of methane QEPAS signal with respect to the water vapor concentration to retrieve the actual CH4 concentration. The sensor was tested by performing prolonged measurements of CH4 and H2O over 60 h to demonstrate the effectiveness of this approach for environmental monitoring applications.

Published
2020
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6. Environmental Monitoring of Methane with Quartz-Enhanced Photoacoustic Spectroscopy Exploiting an Electronic Hygrometer to Compensate the H2O Influence on the Sensor Signal

Author

Elefante, Arianna, primary, Menduni, Giansergio, additional, Rossmadl, Hubert, additional, Mackowiak, Verena, additional, Giglio, Marilena, additional, Sampaolo, Angelo, additional, Patimisco, Pietro, additional, Passaro, Vittorio M. N., additional, and Spagnolo, Vincenzo, additional

Published
2020
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7. Influence of Tuning Fork Resonance Properties on Quartz-Enhanced Photoacoustic Spectroscopy Performance

Author

Jianhui Yu, Wenguo Zhu, Lei Dong, Frank K. Tittel, Zhe Chen, Ali Mozumder, Haoyang Lin, Huadan Zheng, Yihua Liu, Bincheng Huang, Angelo Sampaolo, Jieyuan Tang, Pietro Patimisco, Linpeng Dong, Vincenzo Spagnolo, and John Zweck

Subjects
Materials science, Quartz tuning fork, 02 engineering and technology, lcsh:Chemical technology, 01 natural sciences, Biochemistry, Article, Analytical Chemistry, law.invention, 010309 optics, quartz-enhanced photoacoustic spectroscopy, Quality (physics), Electrical resistance and conductance, law, 0103 physical sciences, custom tuning fork, photoacoustic spectroscopy, lcsh:TP1-1185, Electrical and Electronic Engineering, Tuning fork, Instrumentation, Quartz, Photoacoustic spectroscopy, business.industry, Resonance, quartz tuning fork, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Transducer, Optoelectronics, 0210 nano-technology, business
Abstract

A detailed investigation of the influence of quartz tuning forks (QTFs) resonance properties on the performance of quartz-enhanced photoacoustic spectroscopy (QEPAS) exploiting QTFs as acousto-electric transducers is reported. The performance of two commercial QTFs with the same resonance frequency (32.7 KHz) but different geometries and two custom QTFs with lower resonance frequencies (2.9 KHz and 7.2 KHz) were compared and discussed. The results demonstrated that the fundamental resonance frequency as well as the quality factor and the electrical resistance were strongly inter-dependent on the QTF prongs geometry. Even if the resonance frequency was reduced, the quality factor must be kept as high as possible and the electrical resistance as low as possible in order to guarantee high QEPAS performance.

Published
2019

9. Influence of Tuning Fork Resonance Properties on Quartz-Enhanced Photoacoustic Spectroscopy Performance

Author

Zheng, Huadan, primary, Lin, Haoyang, additional, Dong, Lei, additional, Liu, Yihua, additional, Patimisco, Pietro, additional, Zweck, John, additional, Mozumder, Ali, additional, Sampaolo, Angelo, additional, Spagnolo, Vincenzo, additional, Huang, Bincheng, additional, Tang, Jieyuan, additional, Dong, Linpeng, additional, Zhu, Wenguo, additional, Yu, Jianhui, additional, Chen, Zhe, additional, and Tittel, Frank, additional

Published
2019
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