Retention study of some cation-type compounds using bile acid sodium salts as ion pairing agents in liquid chromatography.
The possibility of forming ion-pairs between bile acids (sodium taurocholate, sodium taurodeoxycholate and sodium taurochenodeoxycholate) and different compounds (pralidoxime, obidoxime and pyridostigmine) having a cationic character has been studied in reversed-phase liquid chromatography (RP-LC). This study can be useful in understanding the role of bile acids in the transport of ionic species through hydrophobic membrane. The present study focused on the influence of mobile phase composition on the retention parameters of chosen compounds (percentage of acetonitrile, pH of aqueous component or ionic strength). For constant concentration of bile acids in aqueous component of mobile phase the functional dependencies between the logarithm of the retention factor (k) and the methanol content in the mobile phase followed a binomial pattern (U-shaped), with a minimum positioned within the interval 70-85% methanol.
University of Bucharest, Faculty of Chemistry, Department of Analytical Chemistry, Sos. Panduri no. 90, Bucharest 050663, Romania.
Medeea
M
Radulescu
Victor
V
Voicu
Andrei
A
Medvedovici
Victor
V
David
D001647:Bile Acids and Salts / Q000737:chemistry*; D002412:Cations / Q000737:chemistry; D002800:Cholinesterase Inhibitors / Q000737:chemistry; D002801:Cholinesterase Reactivators / Q000737:chemistry; D056148:Chromatography, Reverse-Phase / Q000379:methods*; D000432:Methanol / Q000737:chemistry; D010091:Oximes / Q000737:chemistry*; D011220:Pralidoxime Compounds / Q000737:chemistry; D011729:Pyridostigmine Bromide / Q000737:chemistry*; D012044:Regression Analysis
D001647:Bile Acids and Salts; D002412:Cations; D002800:Cholinesterase Inhibitors; D002801:Cholinesterase Reactivators; D010091:Oximes; D011220:Pralidoxime Compounds; D011729:Pyridostigmine Bromide; C028797:pralidoxime; D000432:Methanol