Title:Enantioseparation and Determination of Norepinephrine, Epinephrine and Isoproterenol by Capillary Electrophoresis-indirect Electrochemiluminescence in Human Serum
VOLUME: 14 ISSUE: 5
Author(s):Yuefang Hu and Xiaoping Wei*
Affiliation:College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004
Keywords:Capillary electrophoresis-indirect electrochemiluminescence, Enantioseparation, norepinephrine, epinephrine, isoproterenol,
chiral drugs.
Abstract:Background: Two enantiomers of a drug which might have various pharmacological,
physiological, and toxicological properties are well-known. Enantioseparation of chiral drugs is becoming
significant in various fields.
Objective: The aim was to obtain better detection sensitivity and good enantioresolution of Norepinephrine
(NE), Epinephrine (EP) and Isoproterenol (ISO)at the same time.
Method: A new and sensitive method for NE, EP and ISO was developed by Capillary Electrophoresis-
Indirect Electrochemilumine-Scence (CE-IECL) based on their quenching effects on the
Ru(bpy)3
2+/tripropylamine (Ru(bpy)3
2+/TPA) system, using negatively charged carboxymethyl-betacyclodextrin(
CM-β-CD) as chiral selectors.
Results: The enantiomers of NE, EP and ISO were characterized with baseline enantioseparation and
highly sensitive detection.
Conclusion: A wide and excellent linear relationship of each enantiomer was observed in the range of
0.10 to 1000 µM with detection limit (S/N=3) ranging from 0.03 to 0.10 µM, with the RSD of peak area
and peak height from 3.1-3.5% and 2.9-3.4%, respectively. This CE-IECL method was successfully
applied for the enantioseparation of NE, EP and ISO in serum sample; the recoveries of NE, EP and
ISO in serum ranged from 95.0% to 104.0% with relative standard deviations less than 3.4%.
