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• W2090427775 abstract "Saffron (stigmas of Crocus sativus L.) is a well-known spice with many attributed therapeutic uses throughout centuries. Although studies have demonstrated that crocetin and crocins from saffron have various biological functions, issues concerning the route and way of saffron administration, the absorption and metabolism of saffron carotenoids in humans have not been answered yet. In the present study, an isocratic reversed-phase liquid chromatographic method was developed and validated for the determination of crocetin in plasma. Samples were pre-treated by solid phase extraction (recoveries >72%) and were chromatographed on a Luna C-18 column (4.6 mm × 250 mm, 5 μm) with a mobile phase consisting of methanol–water–trifluoroacetic acid (75.0:24.5:0.5, v/v/v) at a flow rate of 1.0 mL min−1. The HPLC method developed resulted in sharp peaks at 10.7 (trans-crocetin) and 18.6 min (cis-crocetin), whereas the calibration curve of total crocetin in plasma displayed a good linearity for concentrations of 0.020–20 μM (R2 = 0.999). Specificity, precision, accuracy and stability were studied with spiked plasma samples and were acceptable. The developed method was applied to the determination of crocetin levels in plasma of four healthy human volunteers before and after consumption of one cup of saffron tea (200 mg of saffron in 80 °C water for 5 min). Results showed that the concentration of crocetin was high after 2 h (1.24–3.67 μM) and still determined after 24 h (0.10–0.24). Interestingly, the percentage of the cis-isomer ranges from 25 to 50%, suggesting in vivo isomerization." @default.
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• W2090427775 date "2011-06-01" @default.
• W2090427775 modified "2023-10-01" @default.
• W2090427775 title "A new validated SPE-HPLC method for monitoring crocetin in human plasma—Application after saffron tea consumption" @default.
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• W2090427775 doi "https://doi.org/10.1016/j.jpba.2011.02.018" @default.
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