Thus, when the concentration of NaCl is increased from 2 to
6 mmol/L, the reaction will shift forward, resulting in an increase in
percentages of amoxicillin stripping. This can be explained by Le
Chatelier’s principle [38,39]. However, at concentrations of
stripping agents higher than 6 mmol/L, the percentages of
stripping remained constant. This was because of being obstructed
by concentration polarization [40–42] as well as being limited
owing to the amount of complex species which reacted with the
stripping solution at the interface of the liquid membrane–
stripping [29]. According to the molecular kinetic interpretation by
Stokes and Einstein, the increase in high stripping concentration
leads to lower diffusion coefficient. This reason was published with
the earlier report by Chakrabarty et al. [43] and Wannachod et al.
[44]. Consequently, this implied that maximum concentration of