Kinetic Analysis of Solute‐Solvent Partitioning During Saline Jet Nebulization

Although jet nebulization has been extensively studied at the droplet level, time‐resolved, molecular‐level bulk liquid characterization has received relatively little attention. Here, we quantify solution, solvent, and mass loss rates in aqueous NaCl solutions over 300 s of jet nebulization operating at a defined set of conditions. Gravimetric and conductivity measurements indicate that solution and solvent masses decrease at effectively constant rates, independent of NaCl concentration. In contrast, solute nebulization rate strongly correlates with initial NaCl concentration, proceeding via fractional, pseudo‐first order kinetics. Together, the data support a dual‐pathway model that explains compositional drift during jet nebulization. These findings carry practical implications for aerosol science while expanding the fundamental understanding of atomization.