Objective: A sensitive liquid chromatography-mass spectrometric (LC-MS) method for the quantification of salvianolic acid B in rat plasma was developed and validated. The effect of different combination on the salvianolic acid B were studied to investigate SSTG'pharmacokinetics mechanism.
Method: Different combination methods were used for oral administration. The compounds were extracted by solvent in rat plasma and determined using LC-MS-MS method. The results were analysis by DAS software.
Result: Chromatographic separation was achieved on a reversed-phase SB-C18 column with the mobile phase of acetonitrile-methanolformic acid (0.1%) and step gradient elution resulted. The analytes were detected by using an electrospray negative ionization mass spectrometry in the MRM mode. The method showed excellent linearity over the concentration range 0.5-1000 microg x L(-1) (R2=0.999). The low limit of quantification was 0.5 microg x L(-1). The extract recoveries of analytes were from 30.88% to 38.18%. The precisions, the accuracy and the stability all meet the requirements for all analytes. The HPLC-MS-MS technique provided an excellent method for the quantification of SAB in rat plasma.
Conclusion: The method is simple, sensitive and rapid. The plasma concentration of Rg1 and Re were too low to determine. Ginseng & Yanhusuo and Ginseng & Danshen combination can decrease the AUC value and increase the Vd and CL.