Add time:08/25/2019         Source:sciencedirect.com

A rapid, sensitive and specific ultra performance liquid chromatography-tandem mass spectrometry (UPLC–MS/MS) method for the quantification of shanzhiside methyl ester, 8-O-acetylshanzhiside methyl ester and luteolin-7-O-β-d-glucopyranoside of Lamiophlomis rotata Pill in rat plasma was developed and validated. After liquid–liquid extraction with n-butyl alcohol/ethyl acetate (70:30, v/v), analytes and paeoniflorin (internal standard, IS) were separated on an Acquity BEH UPLC C18 column (100 × 2.1 mm, 1.7 μm) with gradient elution at a flow rate of 0.2 mL/min. All calibration curves had good linearity (r > 0.9929) over the concentration ranges of 1–1000 ng/mL for shanzhiside methyl ester and 8-O-acetylshanzhiside methyl ester, 0.3–150 ng/mL for luteolin-7-O-β-d-glucopyranoside. The intra- and inter-day precisions were all within 11.1% and the accuracy (relative error, RE%) all ranged from −13.6% to 5.3%. The method also guaranteed an acceptable selectivity, recovery and stability, which was successfully applied to a pharmacokinetic study of the three analytes in rats after oral administration of Lamiophlomis rotata Pill.

We also recommend Trading Suppliers and Manufacturers of 8-METHYL-7(H)-BENZO[C]CARBAZOLE (cas 117044-44-7). Pls Click Website Link as below: cas 117044-44-7 suppliers