Abstract
Most trace gas detection methods developed so far largely rely on active sampling procedures, which are known to introduce different kinds of artifacts. Here, we demonstrate sampling-free in situ trace gas detection in millimeter scale volumes with fiber coupled cantilever enhanced photoacoustic spectroscopy. Our 2.4 mm diameter fiber-tip sensor is free from the wavelength modulation induced background signal (a phenomenon that is often overlooked in photoacoustic spectroscopy) and reaches a normalized noise equivalent absorption coefficient of 1.3 × 10 -9 W cm -1 Hz -1/2 for acetylene detection. To validate its in situ gas detection capability, we inserted the sensor into a mini fermenter for headspace monitoring of CO 2 production during yeast fermentation. Our results show that the sensor can easily follow the different stages of the CO 2 production of the fermentation process in great detail.
| Language | English |
|---|---|
| Article number | 023102 |
| Pages | 1-8 |
| Number of pages | 8 |
| Journal | Review of Scientific Instruments |
| Volume | 90 |
| Issue number | 2 |
| Early online date | 6 Feb 2019 |
| DOIs | |
| Publication status | Published - Feb 2019 |
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A fiber-tip photoacoustic sensor for in situ trace gas detection. / Zhou, Sheng; Iannuzzi, Davide.
In: Review of Scientific Instruments, Vol. 90, No. 2, 023102, 02.2019, p. 1-8.Research output: Contribution to Journal › Article › Academic › peer-review
TY - JOUR
T1 - A fiber-tip photoacoustic sensor for in situ trace gas detection
AU - Zhou, Sheng
AU - Iannuzzi, Davide
PY - 2019/2
Y1 - 2019/2
N2 - Most trace gas detection methods developed so far largely rely on active sampling procedures, which are known to introduce different kinds of artifacts. Here, we demonstrate sampling-free in situ trace gas detection in millimeter scale volumes with fiber coupled cantilever enhanced photoacoustic spectroscopy. Our 2.4 mm diameter fiber-tip sensor is free from the wavelength modulation induced background signal (a phenomenon that is often overlooked in photoacoustic spectroscopy) and reaches a normalized noise equivalent absorption coefficient of 1.3 × 10 -9 W cm -1 Hz -1/2 for acetylene detection. To validate its in situ gas detection capability, we inserted the sensor into a mini fermenter for headspace monitoring of CO 2 production during yeast fermentation. Our results show that the sensor can easily follow the different stages of the CO 2 production of the fermentation process in great detail.
AB - Most trace gas detection methods developed so far largely rely on active sampling procedures, which are known to introduce different kinds of artifacts. Here, we demonstrate sampling-free in situ trace gas detection in millimeter scale volumes with fiber coupled cantilever enhanced photoacoustic spectroscopy. Our 2.4 mm diameter fiber-tip sensor is free from the wavelength modulation induced background signal (a phenomenon that is often overlooked in photoacoustic spectroscopy) and reaches a normalized noise equivalent absorption coefficient of 1.3 × 10 -9 W cm -1 Hz -1/2 for acetylene detection. To validate its in situ gas detection capability, we inserted the sensor into a mini fermenter for headspace monitoring of CO 2 production during yeast fermentation. Our results show that the sensor can easily follow the different stages of the CO 2 production of the fermentation process in great detail.
UR - http://www.scopus.com/inward/record.url?scp=85061341516&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85061341516&partnerID=8YFLogxK
U2 - 10.1063/1.5082955
DO - 10.1063/1.5082955
M3 - Article
VL - 90
SP - 1
EP - 8
JO - Review of Scientific Instruments
T2 - Review of Scientific Instruments
JF - Review of Scientific Instruments
SN - 0034-6748
IS - 2
M1 - 023102
ER -