On-line solid-phase extraction–HPLC–fluorescence detection for simultaneous determination of puerarin and daidzein in human serum
| Autor: | Ying-Kun Liu, Zhi-Qi Zhang, Xiao-Yan Jia, Xiao Liu |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Chromatography
Chemistry Elution Extraction (chemistry) Daidzein Reproducibility of Results Reference Standards Isoflavones High-performance liquid chromatography Fluorescence spectroscopy Analytical Chemistry Matrix (chemical analysis) chemistry.chemical_compound Spectrometry Fluorescence Puerarin Calibration Humans Solid phase extraction Chromatography High Pressure Liquid |
| Zdroj: | Talanta. 82:1212-1217 |
| ISSN: | 0039-9140 |
| DOI: | 10.1016/j.talanta.2010.06.038 |
| Popis: | Response surface methodology (RSM) was applied to the optimization of on-line solid-phase extraction (SPE) parameters, and an automated system of on-line SPE coupled with high-performance liquid chromatography (HPLC) with fluorescence detection was developed for the determination of puerarin and daidzein in human serum. The human serum sample of 50 microL was injected into a conditioned C18 SPE cartridge, and the matrix was washed out with acetonitrile-KH(2)PO(4)-triethylamine buffer (0.01 M, pH 7.4) (3:97, v/v) for 3 min at a flow rate of 0.25 mL/min. Then the target analytes were eluted and transferred to the analytical column. A chromatographic gradient elution was programmed with the mobile phase consisting of acetonitrile and KH(2)PO(4)-triethylamine buffer, and the analytes were determined with a fluorescence detector at excitation wavelength of 350 nm and emission wavelength of 472 nm, respectively. The proposed method presented good linear relations (0.85-170 microg/mL for puerarin and 0.2-40 microg/mL for daidzein), satisfactory precision (RSD8%), and accredited recovery (92.5-107.8%). |
| Databáze: | OpenAIRE |
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