Equations of mean drop size in pulsed extraction column.

Column type	Correlation	Authors
HPSPCa		Khajenoori et al.40
HPSPC		Panahinia et al.43
VPSPC		Miyauchi et al.44
VPSPC		Míšek et al.45
VPSPC		Moreira et al.46
VPSPC		Kumar et al.47
VPSPC		Kumar et al.48
VPSPC		Kagan et al.49
VPSPC		Sreenivasulu et al.50
VPPC		Samani et al.51

^aHPSPC “horizontal pulsed sieve-plate column”; VPSPC “vertical pulsed sieve-plate column”; VPPC “vertical pulsed packed column”.