Zobrazeno 1 - 10
of 99
pro vyhledávání: '"Jan C. Petersen"'
Autor:
Andreas N. Rasmussen, Benjamin L. Thomsen, Jesper B. Christensen, Jan C. Petersen, Mikael Lassen
Publikováno v:
Sensors, Vol 23, Iss 18, p 7984 (2023)
We report on the use of quartz-enhanced photoacoustic spectroscopy (QEPAS) for multi-gas detection. Photoacoustic (PA) spectra of mixtures of water (H2O), ammonia (NH3), and methane (CH4) were measured in the mid-infrared (MIR) wavelength range using
Externí odkaz:
https://doaj.org/article/9756b746cefa4004ba33a13ec25625fe
Publikováno v:
Molecules, Vol 26, Iss 3, p 609 (2021)
We report on the use of quartz-enhanced photoacoustic spectroscopy for continuous carbon-dioxide measurements in humid air over a period of six days. The presence of water molecules alters the relaxation rate of the target molecules and thus the ampl
Externí odkaz:
https://doaj.org/article/c8cef0b802a743e89933f3695c530edf
Autor:
Jesper B. Christensen, Lasse Høgstedt, Søren M. M. Friis, Jui-Yu Lai, Ming-Hsien Chou, David Balslev-Harder, Jan C. Petersen, Mikael Lassen
Publikováno v:
Sensors, Vol 20, Iss 17, p 4725 (2020)
Quartz-enhanced photoacoustic sensing is a promising method for low-concentration trace-gas monitoring due to the resonant signal enhancement provided by a high-Q quartz tuning fork. However, quartz-enhanced photoacoustic spectroscopy (QEPAS) is asso
Externí odkaz:
https://doaj.org/article/fb9514ec177e4aab984a2f474ad86574
Publikováno v:
Applied Sciences, Vol 9, Iss 12, p 2433 (2019)
Adulteration of extra virgin olive oil (EVOO) with cheaper edible oils is of considerable concern in the olive oil industry. The potential of Raman spectroscopy combined with multivariate statistics has been investigated for evaluating the authentici
Externí odkaz:
https://doaj.org/article/ad45e5a721104ccead6e25c6f809816c
Autor:
Jan C. Petersen, Olav Werhahn
Publikováno v:
Optical Sensors and Sensing Congress 2022 (AIS, LACSEA, Sensors, ES).
Laser spectroscopy providing direct SI-traceable amount fraction, realized by Optical Gas Standards, complement gaseous reference materials. The method needs to be propagated into calibration and measurement capabilities. This paper highlights anchor
Publikováno v:
Applied optics. 60(10)
There is a great need for cost-efficient non-invasive medical diagnostic tools for analyzing humanly exhaled air. Compared to present day methods, photoacoustic spectroscopy (PAS) can provide a compact and portable (bedside), sensitive and inexpensiv
Autor:
David Balslev-Harder, Jan C. Petersen, Mikael Lassen, Lars Henrik Nielsen, Jesper B. Christensen
Publikováno v:
Molecules
Volume 26
Issue 3
Molecules, Vol 26, Iss 609, p 609 (2021)
Volume 26
Issue 3
Molecules, Vol 26, Iss 609, p 609 (2021)
We report on the use of quartz-enhanced photoacoustic spectroscopy for continuous carbon-dioxide measurements in humid air over a period of six days. The presence of water molecules alters the relaxation rate of the target molecules and thus the ampl
Autor:
Javis A. Nwaboh, Zhechao Qu, Gang Li, Mi Eon Kim, Jan C. Petersen, David Balslev-Harder, Olav Werhahn, Volker Ebert
Nitrogen dioxide (NO2) is an atmospheric pollutant that needs to be accurately measured for air quality control. The standard reference method (SRM, as laid down in EN 14211:2012 [1]) for NO2 emissions is based on chemiluminescence, where NO2 is only
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a31532641dedc12e0211d9da3fff9209
https://doi.org/10.5194/egusphere-egu2020-19259
https://doi.org/10.5194/egusphere-egu2020-19259
Autor:
Anette Müllertz, Shiyamala Duraipandian, Hugo Kerdoncuff, Matthias Manne Knopp, Mark R. Pollard, Jan C. Petersen
Publikováno v:
Analytical Methods. 10:3589-3593
In this study, aqueous paracetamol solutions were measured with varying experimental parameters (i.e., laser power and exposure time) using Raman spectroscopy. The solvent Raman spectrum peaked at 1643 cm−1 (i.e., OH bending vibration mode of water
Publikováno v:
Applied Sciences
Volume 9
Issue 12
Applied Sciences, Vol 9, Iss 12, p 2433 (2019)
Volume 9
Issue 12
Applied Sciences, Vol 9, Iss 12, p 2433 (2019)
Adulteration of extra virgin olive oil (EVOO) with cheaper edible oils is of considerable concern in the olive oil industry. The potential of Raman spectroscopy combined with multivariate statistics has been investigated for evaluating the authentici