Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Quantification of amine functional groups and their influence on OM/OC in the IMPROVE network
 
research article

Quantification of amine functional groups and their influence on OM/OC in the IMPROVE network

Kamruzzaman, Mohammed
•
Takahama, Satoshi  
•
Dillner, Ann M.
2018
Atmospheric Environment

Recently, we developed a method using FT-IR spectroscopy coupled with partial least squares (PLS) regression to measure the four most abundant organic functional groups, aliphatic C-H, alcohol OH, carboxylic acid OH and carbonyl C = O, in atmospheric particulate matter. These functional groups are summed to estimate organic matter (OM) while the carbon from the functional groups is summed to estimate organic carbon (OC). With this method, OM and OM/OC can be estimated for each sample rather than relying on one assumed value to convert OC measurements to OM. This study continues the development of the FT-IR and PLS method for estimating OM and OM/OC by including the amine functional group. Amines are ubiquitous in the atmosphere and come from motor vehicle exhaust, animal husbandry, biomass burning, and vegetation among other sources. In this study, calibration standards for amines are produced by aerosolizing individual amine compounds and collecting them on PTFE filters using an IMPROVE sampler, thereby mimicking the filter media and collection geometry of ambient standards. The moles of amine functional group on each standard and a narrow range of amine-specific wavenumbers in the FT-IR spectra (wavenumber range 1 550-1 500 cm(-1)) are used to develop a PLS calibration model. The PLS model is validated using three methods: prediction of a set of laboratory standards not included in the model, a peak height analysis and a PLS model with a broader wavenumber range. The model is then applied to the ambient samples collected throughout 2013 from 16 IMPROVE sites in the USA. Urban sites have higher amine concentrations than most rural sites, but amine functional groups account for a lower fraction of OM at urban sites. Amine concentrations, contributions to OM and seasonality vary by site and sample. Amine has a small impact on the annual average OM/OC for urban sites, but for some rural sites including amine in the OM/OC calculations increased OM/OC by 0.1 or more.

  • Details
  • Metrics
Type
research article
DOI
10.1016/j.atmosenv.2017.10.053
Web of Science ID

WOS:000418626800014

Author(s)
Kamruzzaman, Mohammed
Takahama, Satoshi  
Dillner, Ann M.
Date Issued

2018

Publisher

Pergamon-Elsevier Science Ltd

Published in
Atmospheric Environment
Volume

172

Start page

124

End page

132

Subjects

Fourier transform-infrared spectroscopy

•

FTIR

•

Partial least squares regression

•

Particulate matter

•

Organic matter

•

Organic carbon

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
APRL  
Available on Infoscience
January 15, 2018
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/143998
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés