Column-switching high-performance liquid chromatographic assay for the determination of quercetin in human urine with ultraviolet absorbance detection
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A high-performance liquid chromatographic method is described for the determination of quercetin in human urine using column-switching and ultraviolet (UV) absorbance detection. Urine samples were enzymatically hydrolysed and solid-phase extracted prior to injection onto the high- performance liquid chromatography (HPLC) system. Prior to elution of quercetin and the internal standard, fisetin, from the first column used for sample clean-up, the six-port valve was switched to the second column for analysis with UV detection. Detection of quercetin was accurate and reproducible, with a detection limit of 5 ng/ml. The method was applied to determine the urinary level of quercetin in 120 samples from an intervention study with fruit juice.
Originalsprog | Engelsk |
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Tidsskrift | Journal of Chromatography B: Biomedical Sciences and Applications |
Vol/bind | 707 |
Udgave nummer | 1-2 |
Sider (fra-til) | 81-89 |
Antal sider | 9 |
ISSN | 0378-4347 |
DOI | |
Status | Udgivet - 1998 |
Eksternt udgivet | Ja |
Bibliografisk note
(Ekstern)
ID: 254770881