Measurement of electrical charges carried by airborne bacteria laboratory-generated using a single-pass bubbling aerosolizer

- Electrical charges on bacteria aerosolized with a bubbling generator were measured.
- The fraction of neutral particles in the bioaerosol varied from around 30% to 50%.
- Bacteria carried an average of around -10 to -60 elementary charge units.
- Neutral particles can be produced using an ESP instead of a bipolar neutralizer.