Theoretical prediction of charged droplet evaporation and fission in electrospray ionization

摘要

A theoretical analysis was performed on the droplet asymmetric fission in electrospray ionization process. The formulated model is able to predict the diameter, charge and the percentage of charge at the Rayleigh charge limit for both progeny droplets and residue parent droplet during each fission process based upon possible different numbers of progeny droplets generated by the fission event. The evaporation time required for both the progeny droplets and the residue parent droplet to become unstable after each fission process was also calculated and compared. The results of these calculations showed that the evaporation time for the progeny droplets is more than an order of magnitude less than that of the residue parent droplet, indicating that the progeny droplets are the primary ion source for conventional electrospray ionization sources.