Table 4.

MP properties and the related techniques

Properties	Techniques	References
Shape	OM, CM, SEM	Ali et al. (2019), Nishimura et al. (2017)
Size	CM, SEM, OM, light laser diffraction	Amoyav et al. (2019)
PDI	Light laser diffraction	Gupta et al. (2011)
Porosity	SEM, OM	Amoyav et al. (2019)
ζ-potential	DLS	Ali et al. (2019), Costabile et al. (2018), Cricchio et al. (2017)
Aerodynamic diameter	CI, APS	Cocks et al. (2014), Nishimura et al. (2017)