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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A Hyphenated Preconcentrator-Infrared-Hollow-Waveguide Sensor System for N2O Sensing

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Author(s):
da Silveira Petruci, Joao Flavio [1, 2] ; Wilk, Andreas [2] ; Cardoso, Arnaldo Alves [1] ; Mizaikoff, Boris [2]
Total Authors: 4
Affiliation:
[1] Sao Paulo State Univ, UNESP, Dept Analyt Chem, BR-14800970 Araraquara, SP - Brazil
[2] Ulm Univ, Inst Analyt & Bioanalyt Chem, D-89081 Ulm - Germany
Total Affiliations: 2
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 8, APR 12 2018.
Web of Science Citations: 1
Abstract

Following the Kyoto protocol, all signatory countries must provide an annual inventory of greenhouse-gas emission including N2O. This fact associated with the wide variety of sources for N2O emissions requires appropriate sensor technologies facilitating in-situ monitoring, compact dimensions, ease of operation, and sufficient sensitivity for addressing such emission scenarios. In this contribution, we therefore describe an innovative portable mid-infrared chemical sensor system for quantifying gaseous N2O via coupling a substrate-integrated hollow waveguide (iHWG) simultaneously serving as highly miniaturized mid-infrared photon conduit and gas cell to a custom-made preconcentrator. N2O was collected onto a solid sorbent material packed into the preconcentrator unit, and then released via thermal desorption into the iHWG-MIR sensor utilizing a compact Fourier transform infrared (FTIR) spectrometer for molecularly selective spectroscopic detection with a limit of detection (LOD) at 5 ppbv. Highlighting the device flexibility in terms of sampling time, flow-rate, and iHWG design facilitates tailoring the developed preconcentrator-iHWG device towards a wide variety of application scenarios ranging from soil and aquatic emission monitoring and drone-or unmanned aerial vehicle (UAV)mounted monitoring systems to clinical/medical analysis scenarios. (AU)

FAPESP's process: 14/23974-3 - Development of gas sensors based on substrate-integrated hollow waveguides and infrared spectroscopy for environmental targets monitoring
Grantee:João Flávio da Silveira Petruci
Support type: Scholarships abroad - Research Internship - Post-doctor