Suppression of chiral recognition of 3-hydroxy-1,4-benzodiazepines during micellar electrokinetic capillary chromatography with bile salts.
During the development of a micellar electrokinetic chromatographic screening method for 1,4-benzodiazepines, peak splitting and broadening were observed for some 3-hydroxy-1,4-benzodiazepines (oxazepam, lorazepam, temazepam and lormetazepam). This phenomenon occurred when the micellar phase consisted of bile salts and can be ascribed to the chiral nature of these surfactants. As the bile salts were applied in order to reduce the capacity factors to an appropriate level, enantiomer separation was not an objective and even disturbing. By increasing the analysis temperature, the chiral recognition of these compounds could be suppressed.
Boonkerd
S
S
Department of Pharmaceutical Chemistry and Drug Analysis, Vrije Universiteit Brussel, Belgium.
Detaevernier
M R
MR
Michotte
Y
Y
Vindevogel
J
J
D014151:Anti-Anxiety Agents; D001569:Benzodiazepines / Q000032:analysis*; D001647:Bile Acids and Salts; D002197:Capillary Action; D002845:Chromatography / Q000379:methods*; D007700:Kinetics; D008140:Lorazepam / Q000031:analogs & derivatives / Q000032:analysis; D008823:Micelles; D010076:Oxazepam / Q000032:analysis; D013693:Temazepam / Q000032:analysis
D014151:Anti-Anxiety Agents; D001647:Bile Acids and Salts; D008823:Micelles; D001569:Benzodiazepines; D010076:Oxazepam; D013693:Temazepam; C023842:lormetazepam; D008140:Lorazepam