2014•Analytical LettersRequires access

A Novel Rhein-Functionalized Resin with Application for the Preconcentration of Anthraquinones

Jing Xie, Xun Liao, Fangzhu Qing, Pei Luo, Zhifeng Zhang, Jing Huang, Lin‐Sen Qing

Abstract

Anthraquinones are active components of herbal medicine, and consequently it is necessary to develop a selective, convenient, and green preconcentration method for these compounds. A rhein-functionalized resin was synthesized by a condensation reaction followed by characterization by infrared spectroscopy, transmission electron microscopy, solid carbon-13 nuclear magnetic resonance, and elemental analysis. The rhein-functionalized resin was employed for solid-phase extraction with HPLC-MS for the determination of anthraquinones in the extracts of Polygonum cuspidatum. Emodin, chrysophanol, and physcion were selectively concentrated by a simple absorption and desorption procedure. The results indicated that this new material has application for separating and enriching anthraquinones from herbal medicine, which is significant for pharmaceutical analysis.

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Key concepts: Anthraquinones, Chemistry, Emodin, Elemental analysis, Chromatography, Extraction (chemistry), Solid phase extraction, High-performance liquid chromatography