Evaporation of water from particles in the aerodynamic lens inlet: An experimental study. Zelenyuk, A., Imre, D., & Cuadra-Rodriguez, L., A. Analytical Chemistry, 78(19):6942-6947, 2006.
Evaporation of water from particles in the aerodynamic lens inlet: An experimental study [pdf]Paper  Evaporation of water from particles in the aerodynamic lens inlet: An experimental study [link]Website  abstract   bibtex   
The extremely high particle transmission efficiency aerodynamic lens inlets resulted in their wide use aerosol mass spectrometers. One of the consequences transporting particles from high ambient pressure into vacuum is that it is accompanied by a rapid drop relative humidity (RH). Since many atmospheric exist in the form of hygroscopic water droplets, a drop RH may result in a significant loss of water and even change in phase. How much water is lost in these is presently unknown. Since water loss can affect size, transmission efficiency, ionization probability, mass spectrum, it is imperative to provide experimental data that can serve to guide the field to reasonable and uniform sampling approach. In this we present the results of a number of highly measurements, conducted under well-defined of water evaporation from a range of particles, during transport through an aerodynamic lens inlet. We that the only sure way to avoid ambiguities measurements of aerodynamic diameter in that utilize low-pressure aerodynamic lens inlets is to the particles prior to sampling.

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