The pharmacokinetic study of rutin in rat plasma based on an electrochemically reduced graphene oxide modified sensor.

An electrochemical method based on a directly electrochemically reduced graphene oxide (ERGO) film coated on a glassy carbon electrode (GCE) was developed for the rapid and convenient determination of rutin in plasma. ERGO was modified on the surface of GCE by one-step electro-deposition method. Electrochemical behavior of rutin on ERGO/GCE indicated that rutin underwent a surface-controlled quasi-reversible process and the electrochemical parameters such as charge transfer coefficient (), electron transfer number () and electrode reaction standard rate constant ( ) were 0.

Evaluation preparation technology of Xiaochaihu granules using fingerprint-peak pattern matching.

An approach was proposed to evaluate preparation technology by means of fingerprint-peak matching technology of high Performance liquid chromatography with diode array detector (HPLC-DAD). Similarity and hierarchical clustering analysis (HCA) were applied to identify the 15 batches of Xiaochaihu granules from different manufacturers and our laboratory, and peak pattern matching between the composite formulae and Chinensis, which was one of the main ingredients of Xiaochaihu granules, was utilized to evaluate the preparation technology of Xiaochaihu granules via the indexes of the relative deviation of retention time (RT) and UV spectrum feature similarity of their corresponding peaks. Eleven matching peaks were found between Xiaochaihu granules and Chinensis.