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A new rapid and reproducible method using microemulsion electrokinetic chromatography (MEEKC) combining field amplified sample injection and electroosmotic flow suppressant for the analysis of five quinolizidine alkaloids is developed in this paper. For the separation of five quinolizidine alkaloids, a running buffer composed of 1.2% (v/v) 1-butanol, 0.6% (v/v) ethyl acetate and 98.2% (v/v) 1 mM Na2B4O7-2 mm NaH2PO4 buffer solution containing 21 mM sodium cholate (SC) (pH 6.5) was developed. The resolution of the analytes was improved significantly by adding a divalent cation (e.g., Mg2+) to the running buffer as an electroosmotic flow modification. In order to analyze trace quinolizidine alkaloids in traditional Chinese herbal medicines, field amplified sample injection (FASI) was applied to increase the detection sensitivity. The detection limits (defined as S/N = 3) for the analytes could be as low as 0.0001 mu g/mL. This method was applied for the determination of quinolizidine alkaloids in real samples with simple extraction procedures, and the assay results were satisfactory. (C) 2008 Elsevier B.V. All rights reserved.
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JOURNAL OF CHROMATOGRAPHY A
ISSN: 0021-9673
Year: 2008
Volume: 1198
Page: 220-225
3 . 7 5 6
JCR@2008
3 . 8 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
JCR Journal Grade:1
Cited Count:
WoS CC Cited Count: 34
SCOPUS Cited Count: 35
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
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