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With mesoporous carbon(CMK-3) serving as a support,we prepared a novel nanocomposite of polypyrrole/mesoporous carbon(PPy-CMK-3) by an in situ chemical polymerization method.An electrochemical hybrid capacitor was successfully designed using a PPy-CMK-3 composite and CMK-3 as positive and negative electrodes,respectively.The electrochemical capacitance performance of this kind of hybrid capacitor was investigated in 1.0 mol·L-1 NaNO3 electrolyte solution.The discharge capacity of the hybrid capacitor reached 57 F·g-1 under a current density of 5.0 mA·cm-2 and cell voltage of 1.4 V.The energy density of the hybrid capacitor reached 17 Wh· kg-1 with a power density of 2.5×102 W·kg-1.When the current density was increased from 5.0 to 50 mA·cm-2,the capacity of the hybrid capacitor remained at about 80% and it showed excellent high rate charge-discharge performance.Furthermore,the PPy-CMK-3/CMK-3 hybrid capacitor containing this PPy-CMK-3 nanocomposite could be active easily and it possessed a high charge-discharge efficiency and good cycle performance.

Glycyrrhic acid (GA) and liquiritin are the two classes of bioactive components in licorice with known pharmacological effects. In our study, different methods were compared to separate GA an-d liquiritin. Solid-phase extraction (SPE) method was verified to separate GA and liquiritin effectively. The method is fast, easy, reliable, and inexpensive; especially in the quality control. Moreover, we built a new method to determine glycyrrhizic acid and liquiritin simultaneously using reversed phase high performance liquid chromatography (RP-HPLC) In the HPLC analyze, gradient elution and two wavelength were used . The regression line for GA was y =15340.6x+12.81, the regression for liquiritin line was y =9269.1x+20.63, The recovery rates were 101.3% and 99.4%; RSD were 1.01% and 0.92%.