Figure 4.
Effects of constant temperature and constant wattage on radical production for a typical e-liquid solvent (75:25). (a) Effects of different constant temperatures on radical generation in a 75:25 (PG:GLY) solution. (b) Effects of different constant wattages on radical generation in a 75:25 PG/GLY solution. Different letters indicate significantly different values. (c) Sample PBN spectra of the different constant temperatures. (d) Sample PBN spectra of the different constant wattages.