Table 2.

Permeation coefficients from various weak acid permeation studies (units of 10⁻⁴ cm·s⁻¹)

Acid	Ref. 9	Ref. 10	Ref. 20	Ref. 12	Ref. 16	This study
Acetic	2.38	5		66	3.9, 65	22.0
Butanoic	11.5		640	950		8.9
Valeric	18.0					7.6
Hexanoic				11,000		6.33
Temperature,°C	25	7	25 ± 2	22 ± 2	20, 26	20 ± 2

All studies used egg PC, except DMPC was used in ref. 16 and soybean PC was used in this study.