Elemental ratio measurements of organic compounds using aerosol mass spectrometry: characterization, improved calibration, and implications
M. Canagaratna, J. Jimenez, J. Kroll, Qi Chen, S. Kessler, P. Massoli, L. H. Ruiz, Edward Charles Fortner, L. Williams, K. Wilson, J. Surratt, N. Donahue, J. Jayne, D. Worsnop