Study on separation of aristolochic acid I and II by micellar electrokinetic capillary chromatography and competition mechanism between SDS and β-cyclodextrin

✍ Scribed by Wei Li; Zheng Chen; Yiping Liao; Huwei Liu

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 188 KB
• Volume: 27
• Category: Article
• ISSN: 0173-0835
• DOI: 10.1002/elps.200500228

✦ Synopsis

Abstract

In this study, a rapid MEKC method using 40 mM sodium borate buffer containing 50 mM SDS as surfactant was developed for the analysis of aristolochic acid (AA) in Aristolochia plants. Baseline separation of AA‐I and AA‐II was achieved within 3 min with high separation efficiency, satisfactory sensitivity, repeatability, and recovery. Resolution between AA‐I and AA‐II is above 5 and great performance with higher than 200 000 theoretical plate numbers was obtained. The detection limits (based on 3 S/N) were both 1.0 μg/mL. Two kinds of AA in 35 herbal samples of Aristolochia plants were successfully determined. The competition mechanism between β‐CD and SDS was also investigated by changing the content ratio of β‐CD and SDS.