Simultaneous determination of eight anthraquinones in Semen Cassiae by HPLC-DAD

Lijia Xu, Chi On Chan, Ching Ching Lau, Zhiling Yu, Kam Wah Mok, Sibao Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

38 Citations (Scopus)

Abstract

Introduction Semen Cassiae (SC), a traditional Chinese herbal medicine for the treatment of various diseases, is known to contain active anthraquinone ingredients. However, since the content of some anthraquinones is too low, previous analytical methods only allow the quantitation of a few anthraquinones or a hydrolysis step has to be included in the sample preparation. A rapid and accurate method to examine the content of as many anthraquinones as possible in SC would be desirable. Objective To develop a rapid, sensitive and accurate high-performance liquid chromatography-diode array detection (HPLC- DAD) method to simultaneously quantify eight major anthraquinones (obtusifolin-2-glucoside, aurantio-obtusin, aloe- emodin, rhein, obtusifolin, emodin, chrysophanol and physcion) in SC. Methodology The separation of anthraquinones was achieved on a C 18-column with a gradient elution using acetonitrile and 0.1% phosphoric acid. The detection wavelength was 278 nm and the analysis finished within 25 min. Results The limits of detection of these compounds ranged from 0.07 to 0.15 μg/mL while the limits of quantitation ranged from 0.24 to 0.51 μg/mL. All calibration curves showed good linearities (r 2 > 0.999) within the test ranges. This validated method was successfully used to analyse 22 batches of SC samples collected from various geographical locations. Conclusion The method was validated to be simple, rapid, accurate and reliable to simultaneously determine eight major anthraquinones in SC. Meanwhile, a more specific anthraquinone, obtusifolin, was proposed to serve as a marker for SC, replacing chrysophanol.
Original languageEnglish
Pages (from-to)110-116
Number of pages7
JournalPhytochemical Analysis
Volume23
Issue number2
DOIs
Publication statusPublished - 1 Mar 2012

Keywords

  • anthraquinone
  • Cassia obtusifolia L.
  • HPLC-DAD
  • obtusifolin
  • Semen Cassiae

ASJC Scopus subject areas

  • Complementary and alternative medicine
  • Molecular Medicine
  • Drug Discovery
  • Food Science
  • Biochemistry
  • Analytical Chemistry
  • Plant Science

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