Journal
ANALYTICA CHIMICA ACTA
Volume 545, Issue 2, Pages 137-141Publisher
ELSEVIER
DOI: 10.1016/j.aca.2005.04.071
Keywords
electrochemiluminescene; capillary electrophoresis; atropine; scopolamine
Categories
Ask authors/readers for more resources
The coupling of Ru(bpy)(3)(2+) based electrochemiluminescence (ECL) detection with capillary electrophoresis (CE) was developed for the simultaneous determination of the two major active ingredients (atropine and scopolamine) in Flos daturae. Parameters related to the separation and detection were discussed and optimized. It was proved that 20 mM phosphate buffer at pH 8.48 could achieve the most favorable resolution, and the high sensitivity of detection was obtained by maintaining the detection potential at 1.2 V. Under the optimized conditions: ECL detection at 1.2 V, 20 mM phosphate buffer at pH 8.48,5 mM Ru(bpy);2, and 50 mM phosphate buffer at pH 7.48 in the detection reservoir, detection limits of 5 x 10(-8) mol/l for atropine and 1 x 10(-6) mol/l for scopolamine were obtained. Relative standard derivations of the ECL intensity and the migration time were 5.16 and 0.71% for atropine and 5.07 and 1.22% for scopolamine, respectively. Developed method was successfully applied to determine the amounts of both alkaloids in Flos daturae. A baseline separation for atropine and scopolamine was achieved within 11 min. (c) 2005 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available