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Highly sensitive and selective pre-column derivatization high-performance liquid chromatography approach for rapid determination of triterpenes oleanolic and ursolic acids and application to Swertia species: Optimization of triterpenic acids extraction and pre-column derivatization using response surface methodology

Guoliang Li, Xiaolong Zhang, Jinmao You, Cuihua Song, Zhiwei Sun, Lian Xia, and Yourui Suo

Anal Chim Acta 688(2):11 (2011) PMID 21334488

Oleanolic acid (OA) and ursolic acid (UA) are the ubiquitous triterpenic acids in plant kingdom and have multiple biological effects. In the present study, a highly sensitive and selective method using a dual-sensitive probe 2-(5-benzoacridine)ethyl-p-toluenesulfonate (BAETS) as pre-column labeling reagent has been developed for rapid determination of the triterpenes OA and UA by HPLC with fluorescence detection (FLD) and online mass spectrometry identification. Response surface methodology as an efficient tool was employed to optimize the ultrasonic-assisted extraction of triterpenic acids from Swertia plants and the pre-column derivatization reaction, respectively, which ensured the highest triterpenic acids recoveries within the shortest extraction time and the sufficient labeling of the analyzed components. Fast separation of the isomers OA and UA could be achieved on a Hypersil BDS C8 column within 7min. Both of OA and UA gave the good correlation coefficients of 0.9999. This developed method offered the satisfactory detection limits of 1.10 and 1.30ngmL^-^1 for UA and OA, respectively. When applied to Swertia species, it showed good reproducibility.

Copyright © 2011 Elsevier Ltd. All rights reserved.

DOI: 10.1016/j.aca.2011.01.010
Version: za2963e q8za7 q8zb4 q8zcb q8zd5 q8zed q8zfb q8zg0

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