Abstract
An HPLC method with photodiode array detection (PAD) and ESI/MS detection was developed for the qualitative and quantitative analysis of the major chemical constituents of the dried rhizome of Polygonum cuspidatum Sieb. et Zucc. (Rhizoma Polygoni Cuspidati; Chinese name Hu-Zhang). Based on the chromatographic separation on an Altima C18 column using 0.5% aqueous acetic acid and acetonitrile as the mobile phase, nine compounds, including stilbenes, stilbene glucosides, anthraquinones and anthraquinone glucosides, were identified by online ESI/MS analysis and seven were quantified by HPLC-PAD. A full validation of the method including sensitivity, linearity, repeatability and recovery was conducted. Linear calibration was achieved over the concentration range 1-200 mg/L with R2 > 0.999, whilst the limits of detection ranged from 0.51 to 1.57 ng. Repeatability was evaluated by intra- and inter-day assays and the RSD value was within 1.79%. Recoveries of the quantified compounds were within the range 96.0-100.1% with RSD values of less than 2.2%. Five samples of Rhizoma Polygoni Cuspidati from different regions were analysed using the developed method. The major constituents piceid, resveratrol, emodin-8-O-β-D-glucoside and emodin were selected to provide an index for the quality assessment of the herbal drug.
Original language | English |
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Pages (from-to) | 387-392 |
Number of pages | 6 |
Journal | Phytochemical Analysis |
Volume | 18 |
Issue number | 5 |
DOIs | |
Publication status | Published - Sept 2007 |
Scopus Subject Areas
- Analytical Chemistry
- Food Science
- Biochemistry
- Molecular Medicine
- Plant Science
- Drug Discovery
- Complementary and alternative medicine
User-Defined Keywords
- HPLC-ESI-MS
- HPLC-UV
- Polygonum cuspidatum: Rhizoma Polygoni Cuspidati
- Quality assessment