Figure 7.

Deposition efficiency of nanoparticles and solutes on the bottom of the exposure chamber. All measurements were performed after nebulization of 1 mL of suspension/solution with varying nanoparticle/solute mass concentration. The symbols represent the mean and standard deviation (error bars) for up to 12 independent measurements (no error bar for n = 1). The solid and dashed lines indicate the mean (0.566) and standard deviation (0.067) of the entire data set, respectively. The 68% confidence level (SEM) of the mean is 0.012 (n = 30). The detection limit of the QCM (12.4 ppm) corresponds to 18 ng/cm².