@article{fdi:010094573,
  title = {{C}omposition and sources of organic aerosol in two megacities in {W}estern {C}hina using complementary mass spectrometric and statistical techniques},
  author = {{C}ui, {T}. and {M}anousakas, {M}.{I}. and {W}ang, {Q}. and {U}zu, {G}a{\¨e}lle and {H}ao, {Y}. and {K}hare, {P}. and {Q}i, {L}. and {C}hen, {Y}. and {H}an, {Y}. and {S}lowik, {J}.{G}. and {J}affrezo, {J}.{L}. and {C}ao, {J}. and {P}r{\'e}v{\^o}t, {A}.{S}.{H}. and {D}aellenbach, {K}.{R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{O}ver 300 daily {PM}2.5 filter samples were collected in two western {C}hinese megacities, {X}i'an and {C}hongqing, from {O}ctober 2019 to {M}ay 2020. {T}heir aqueous extracts were nebulized simultaneously to an aerosol mass spectrometer ({AMS}) and a recently developed extractive electrospray ionization ({EESI}) mass spectrometer, for bulk and near-molecular organic aerosol ({OA}) composition, respectively. {C}arbonate was quantified using {EESI} and a total organic carbon analyzer to separate inorganic carbon from dust. {V}ia isotopically-labelled internal standards and positive matrix factorization, seven water-soluble sources were quantified separately using the {AMS}- and {EESI}-based analyses, with consistent types, concentrations, and correlations. {T}hese include dust, solid fuel combustion ({SFC})-related, nitrogen- (and sulfur-) containing, summer/winter oxygenated {OA}s, and a cigarette-related {OA} only in {EESI}. {W}hen accounting for water-solubility, {SFC}-related {OA}s were the largest (53%) sources in {C}hongqing, while dust (consisting of 77% {OA} and 23% carbonates) was the largest (30%) source in {X}i'an. {O}verall, this study presents one of the first times that complementary mass spectrometric techniques independently resolved consistent {OA} sources?with added chemical information over multiple seasons and locations of complex pollution. {T}he methods and quantified sources are essential for subsequent chemical, modelling, and health studies, and policy making for air pollution mitigation.},
  keywords = {{CHINE} ; {XI}'{AN} ; {CHONGQUING}},
  booktitle = {},
  journal = {{ACS} {E}nvironmental {S}cience and {T}echnology {A}ir},
  volume = {1},
  numero = {9},
  pages = {1053--1065},
  ISSN = {2837-1402},
  year = {2024},
  DOI = {10.1021/acsestair.4c00051},
  URL = {https://www.documentation.ird.fr/hor/fdi:010094573},
}