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Four flavonoids (rutin, hyperoside, quercitrin and quercetin) in Houttuynia cordata Thunb. and Sat(runts chinensis (Lour.) Bail. were determined by capillary electrophoresis with wall-Jet amperometric detection. The working electrode was a 500 mu m diameter carbon disc electrode and the detection potential was +0.95 V (versus Ag/AgCl. Effects of several important factor., Such as the running buffer and its corresponding pH and concentration, separation voltage, injection time were investigated to acquire the Optimum conditions for separation of these four flavonoids. Baseline separation for the four flavonoids was obtained within 2 1 min in a 60 cm length capillary at a separation voltage of 15 kV with a 60 mmoL/L Na2B4O7-120 mmoL/L NaH2PO4 buffer (pH 8.8) as running buffer. The relationship between peak currents and analyte concentrations was linear over about two orders of magnitude with detection limits (defined as S/N = 3) ranging from 0.02 to 0.05 mu g/mL for all analytes. This method was applied for the determination of the above four flavonoids in H. cordata Thunb. and S. chinensis (Lour.) Bail. with simple extraction procedures, and the assay results were satisfactory. (c) 2005 Elsevier B.V. All rights reserved.
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TALANTA
ISSN: 0039-9140
Year: 2006
Issue: 3
Volume: 68
Page: 759-764
2 . 8 1
JCR@2006
5 . 6 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
JCR Journal Grade:1
Cited Count:
WoS CC Cited Count: 58
SCOPUS Cited Count: 74
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2
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