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

Autor(es)

da Silveira Petruci, Joao Flavio ^{[1, 2]} ; Wilk, Andreas ^[2] ; Cardoso, Arnaldo Alves ^[1] ; Mizaikoff, Boris ^[2]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIFIC REPORTS; v. 8, APR 12 2018.
• Citações Web of Science: 1

Resumo

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)

• Processo FAPESP: 14/23974-3 - Desenvolvimento de sensores gasosos utilizando guias de onda OCO e espectrometria no infravermelho para monitoramento de analitos de interesse ambiental
• Beneficiário: João Flávio da Silveira Petruci
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado