Fig. 2: Modeling and observation of the gas-to-particle partitioning of hydrophilic and hydrophobic OPEs. | Nature Communications

Fig. 2: Modeling and observation of the gas-to-particle partitioning of hydrophilic and hydrophobic OPEs.

From: Aqueous secondary formation substantially contributes to hydrophilic organophosphate esters in aerosols

Fig. 2

a, b Comparison between the measured (Fp,m) and the calculated particle-phase fractions (Fp,t) of hydrophilic and hydrophobic OPEs by Pankow’s absorptive theory during summer and winter; Fp,t as a function of \({{\mbox{p}}}_{{\mbox{L}}}^{\circ }\) spans the gray-shaded region, where the upper and lower limits are calculated using activity coefficients (ξ) corresponding to 0.3 and 3.0, respectively. Measured particle-phase fractions of (c, d) hydrophilic (e, f) hydrophobic OPEs as a function of aerosol liquid water mass fraction (FALW) and organic matter mass fraction (FOM) in PM2.5. The error bars in (a–f) represent the standard deviation of the measured fraction values.

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