Solid-phase excitation-emission matrix spectroscopy for chemical analysis of combustion aerosols.

Exposure to ultrafine combustion aerosols such as particulate matter (PM) from residential woodburning, forest fires, cigarette smoke, and traffic emission have been linked to adverse health outcomes. Excitation-emission matrix (EEM) spectroscopy presents a sensitive and cost-effective alternative f...

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Autores principales:	Gaurav Mahamuni, Jiayang He, Jay Rutherford, Byron Ockerman, Arka Majumdar, Edmund Seto, Gregory Korshin, Igor Novosselov
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/60d79e5368404ec98fe78ff4cafd6937
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spelling	oai:doaj.org-article:60d79e5368404ec98fe78ff4cafd69372021-11-25T06:19:06ZSolid-phase excitation-emission matrix spectroscopy for chemical analysis of combustion aerosols.1932-620310.1371/journal.pone.0251664https://doaj.org/article/60d79e5368404ec98fe78ff4cafd69372021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0251664https://doaj.org/toc/1932-6203Exposure to ultrafine combustion aerosols such as particulate matter (PM) from residential woodburning, forest fires, cigarette smoke, and traffic emission have been linked to adverse health outcomes. Excitation-emission matrix (EEM) spectroscopy presents a sensitive and cost-effective alternative for analysis of PM organic fraction. However, as with other analytical chemistry methods, the miniaturization is hindered by a solvent extraction step and a need for benchtop instrumentation. We present a methodology for collecting and in-situ analysis of airborne nanoparticles that eliminates labor-intensive sample preparation and miniaturizes the detection platform. Nanoparticles are electrostatically collected onto a transparent substrate coated with solid-phase (SP) solvent-polydimethylsiloxane (PDMS). The PM organic fraction is extracted into PDMS and analyzed in-situ, thus avoiding liquid-phase extraction. In the SP-EEM analysis, we evaluated external and internal excitation schemes. Internal excitation shows the lowest scattering interference but leads to signal masking from PDMS fluorescence for λ<250nm. The external excitation EEM spectra are dependent on the excitation light incident angle; ranges of 30-40° and 55-65° show the best results. SP-EEM spectra of woodsmoke and cigarette smoke samples are in good agreement with the EEM spectra of liquid-phase extracts. The SP-EEM technique can be used to develop wearable sensors for exposure assessments and environmental monitoring.Gaurav MahamuniJiayang HeJay RutherfordByron OckermanArka MajumdarEdmund SetoGregory KorshinIgor NovosselovPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 5, p e0251664 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Gaurav Mahamuni Jiayang He Jay Rutherford Byron Ockerman Arka Majumdar Edmund Seto Gregory Korshin Igor Novosselov Solid-phase excitation-emission matrix spectroscopy for chemical analysis of combustion aerosols.
description	Exposure to ultrafine combustion aerosols such as particulate matter (PM) from residential woodburning, forest fires, cigarette smoke, and traffic emission have been linked to adverse health outcomes. Excitation-emission matrix (EEM) spectroscopy presents a sensitive and cost-effective alternative for analysis of PM organic fraction. However, as with other analytical chemistry methods, the miniaturization is hindered by a solvent extraction step and a need for benchtop instrumentation. We present a methodology for collecting and in-situ analysis of airborne nanoparticles that eliminates labor-intensive sample preparation and miniaturizes the detection platform. Nanoparticles are electrostatically collected onto a transparent substrate coated with solid-phase (SP) solvent-polydimethylsiloxane (PDMS). The PM organic fraction is extracted into PDMS and analyzed in-situ, thus avoiding liquid-phase extraction. In the SP-EEM analysis, we evaluated external and internal excitation schemes. Internal excitation shows the lowest scattering interference but leads to signal masking from PDMS fluorescence for λ<250nm. The external excitation EEM spectra are dependent on the excitation light incident angle; ranges of 30-40° and 55-65° show the best results. SP-EEM spectra of woodsmoke and cigarette smoke samples are in good agreement with the EEM spectra of liquid-phase extracts. The SP-EEM technique can be used to develop wearable sensors for exposure assessments and environmental monitoring.
format	article
author	Gaurav Mahamuni Jiayang He Jay Rutherford Byron Ockerman Arka Majumdar Edmund Seto Gregory Korshin Igor Novosselov
author_facet	Gaurav Mahamuni Jiayang He Jay Rutherford Byron Ockerman Arka Majumdar Edmund Seto Gregory Korshin Igor Novosselov
author_sort	Gaurav Mahamuni
title	Solid-phase excitation-emission matrix spectroscopy for chemical analysis of combustion aerosols.
title_short	Solid-phase excitation-emission matrix spectroscopy for chemical analysis of combustion aerosols.
title_full	Solid-phase excitation-emission matrix spectroscopy for chemical analysis of combustion aerosols.
title_fullStr	Solid-phase excitation-emission matrix spectroscopy for chemical analysis of combustion aerosols.
title_full_unstemmed	Solid-phase excitation-emission matrix spectroscopy for chemical analysis of combustion aerosols.
title_sort	solid-phase excitation-emission matrix spectroscopy for chemical analysis of combustion aerosols.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/60d79e5368404ec98fe78ff4cafd6937
work_keys_str_mv	AT gauravmahamuni solidphaseexcitationemissionmatrixspectroscopyforchemicalanalysisofcombustionaerosols AT jiayanghe solidphaseexcitationemissionmatrixspectroscopyforchemicalanalysisofcombustionaerosols AT jayrutherford solidphaseexcitationemissionmatrixspectroscopyforchemicalanalysisofcombustionaerosols AT byronockerman solidphaseexcitationemissionmatrixspectroscopyforchemicalanalysisofcombustionaerosols AT arkamajumdar solidphaseexcitationemissionmatrixspectroscopyforchemicalanalysisofcombustionaerosols AT edmundseto solidphaseexcitationemissionmatrixspectroscopyforchemicalanalysisofcombustionaerosols AT gregorykorshin solidphaseexcitationemissionmatrixspectroscopyforchemicalanalysisofcombustionaerosols AT igornovosselov solidphaseexcitationemissionmatrixspectroscopyforchemicalanalysisofcombustionaerosols
_version_	1718413927001358336

Solid-phase excitation-emission matrix spectroscopy for chemical analysis of combustion aerosols.

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