El. Tan et al., CHARACTERIZATION OF ION-PAIR FORMATION BETWEEN IONIZED INDOMETHACIN AND CATIONIC SURFACTANTS, Journal of dispersion science and technology, 14(6), 1993, pp. 609-624
The interactions between sodium indomethacin and chloride salts of fou
r quaternary ammonium compounds were characterized. Investigations inv
olved conductimetric studies at concentration regions wherein ion-pair
s exist in equilibrium with the solution of participating ions. Iontop
horesis was also utilized to investigate the phenomenon of ion-pairing
. Characteristic of large molecules, extremely high levels of ion-pair
association constants and low degrees of dissociation were obtained.