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The continuous sampling FTIR/AFT (aerosol flow tube) has been constructed in the present work, leading to the in situ observation of the supersaturated solutions of MgSO4 and NaClO4 aerosols. The observation suggests that the MgSO4 aerosol show serious mass transfer limitation at low RH (relative humidity), while the NaClO4 aerosol deli-quesce without notable effect of kinetic factors. It is also shown that the v3 band of SO42- is very sensitive to the forma-tion of contact ion pairs in the supersaturated solutions of MgSO4 aerosol.
The continuous sampling FTIR / AFT (aerosol flow tube) has been constructed in the present work, leading to the in situ observation of the supersaturated solutions of MgSO4 and NaClO4 aerosols. The observation suggests that the MgSO4 aerosol show serious mass transfer limitation at low RH (relative humidity), while the NaClO4 aerosol deli-quesce without notable effect of kinetic factors. It is also shown in the v3 band of SO42- is very sensitive to the forma- tion of contact ion pairs in the supersaturated solutions of MgSO4 aerosol.