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An extractive electrospray ionization time-of-flight mass spectrometer (EESI-TOF) for online measurement of atmospheric aerosol particles

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Figure 1. Schematic of the EESI-TOF inlet and ion source, includ-ing connection to TOF-MS.
Figure 2. (a) Sample time series of [C10H16O8]Na+ measured inSOA generated from α-pinene ozonolysis, showing aerosol mea-surement periods (3 min) interspersed with filter blanks (30 s)
Figure 3. EESI-TOF signal as a function of mass concentrationrepresented both in terms of the flux of ions (left axis) and massmeasured by a scanning mobility particle sizer (SMPS), assumingspherical particles with the material density of the pure compound,
Figure 4. EESI-TOF sensitivity (ions molec.oxidation of single precursors in a PAM flow reactor
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