Characteristic Ingredients Profiling of Glycyrrhiza Radix and Semen Strychni in Rat Plasma Using HPLC-UV-MS / 中国药学杂志

ABSTRACT

OBJECTIVE: To establish a high performance liquid chromatography coupled with tandem mass spectrometry and ultraviolet detector (HPLC-UV-MS) method for determination of the mixture of Glycyrrhiza Radix extract at detoxification dosage and Semen Strychni extract at poisonous dosage, which will be applied to the characteristic ingredients profiling in rat plasma. METHODS: Sino Chrome ODS-BP column (4.6 mm×250 mm, 5 μm) was employed, which was maintained at 40℃, and the mobile phase was composed of water (0.1% formic acid) (A) and acetonitrile (B). The gradient elution program was as follows: 0.01 min 8% B, 2 min 8% B, 30 min 25% B, 32 min 30% B, 50 min 45% B, 53 min 85% B, 60 min 85% B, 61 min 8% B, and terminated at 77 min, eluted at a flow rate of 0.3 mL·min-1. A UV detector was equipped and the detection wavelength was 254 nm. ESI+ mode was selected for strychnos alkaloids with cone voltage of 30 V and capillary voltage of 2.5 V, while ESI- mode for glycyrrhiza with cone voltage of 25 V and capillary voltage of 3.5 V. Acetonitrile was used as protein precipitation agent to determine the characteristic ingredients in rat plasma. RESULTS: An HPLC-UV-MS method for simultaneous determination of liquorice and Semen Strychni extract was established and applied to measure the components absorbed into blood. The material changes of liquorice and Semen Strychni in vivo and vitro were also compared. CONCLUSION: A simple, repeatable HPLC-UV-MS method for analysis of Glycyrrhiza Radix and Semen Strychni in vivo and vitro was established. The related components are speculates, which provided the experimental basis to research the detoxification mechanism of Glycyrrhiza Radix against strychninization.