Abstract
CE offers the possibility of fast, cheap and reproducible separations for active compounds of Chinese herbs. Lotusine (1), liensinine (2), isoliensinine (3) and neferine (4) were the major bioactive alkaloids in lotus plumule, which was used as an important Chinese herb. In this paper, simultaneous separation of 1–4 in lotus plumule by nonaqueous CZE has been achieved within 11 min by use of buffer consisting of 80 mM sodium acetate and 40 mM ammonium acetate methanol solution of pH 5.4. Analysis of the four alkaloids in ten plumule samples of Nelumbo nucifera was conducted. Limits of detection (LOD) of 1–4 by UV absorbance at 203 nm were achieved in the range of 1.5–2.8 μg mL−1. Reproducibility (percent RSD) of the analysis by CZE were 2.33, 2.31, 0.78 and 2.58 %, respectively (n = 5).
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Acknowledgments
The authors would like to thank David Wedge of Natural Products Utilization Research Unit and National Center for Natural Products Research University, MS, USA, for editorial help on the manuscript. This research was supported by Jiangsu Provincial Natural Science Fund (BK2006237), Qing Lan Project (2008′) and the Priority Academic Program Development of Jiangsu Higher Education Institutions (Project No. ysxk–2010).
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Yang, G., Li, W., Pan, Y. et al. Rapid Simultaneous Determination of Four Alkaloids in Lotus Plumule by CZE with Ephedrine Hydrochloride as an Internal Standard. Chromatographia 75, 1295–1300 (2012). https://doi.org/10.1007/s10337-012-2312-7
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DOI: https://doi.org/10.1007/s10337-012-2312-7