Evaporation is crucial in airborne sampling, where air outside of the research plane is very cold and the air inside of the research plane is contrastingly hot. The evaporation occurs from the time the aerosols enter the inlet tubes of the research plane to the time the aerosols reach the measuring instrument. In this study, the effect of inlet tube diameter size and the residence time of air in an inlet tube on organic aerosol (OA) evaporation was researched through a semi-volatile organic concentration partitioning model to study such evaporation. The mass fractions remaining (MFRs) in three different OA atmospheric conditions were collected and plotted against varying diameters and residence times. After comparing the summary plots, it was concluded that the extent of evaporation was lowest when diameter was as large as possible-given the range of 0.0038m to 0.051m-and residence time inside of the inlet tube was as short as possible-given the range of 0-10s. This partitioning model was made within the computer program of Python, version 3, to allow for open-source distribution.