Simultaneous Determination of Contents of 6 Components in Aerial Part of Rheum tanguticum Maxim.ex Balf by HPLC Method / 中国中医药信息杂志

Objective To develop an HPLC method to determine the contents of chrysophanol, emodin, physcion, aloe-emodin, sennoside A, and sennoside B simultaneously in the aerial part of Rheum tanguticum Maxim.ex Balf. Methods The analysis was achieved with an Agilent ZORBAX SB-C18 analytic column (250 mm × 4.6 mm, 5 μm) by gradient elution of methanol-0.1％ phosphoric acid in water gradient elution system (0 min, 70％ B; 5 min, 65％ B;8–16 min, 60％ B; 18–23 min, 55％ B; 25–30 min, 45％ B; 32–39 min, 35％ B; 49–57 min, 24％ B; 65–72 min, 20％ B). The flow rate was 1.0 mL/min; detection wavelength was 254 nm; the column temperature was room temperature; the quantification used external standard method. Results The peak areas and concentrations of chrysophanol, emodin, physcion, aloe-emodin, sennoside A, and sennoside B showed good linear relationship within a certain concentration range (r≥0.9995); the RSD of precision was 0.75％–1.17％; the RSD of repeatability was 0.99％–2.06％; the RSD of stability was 0.97％–1.76％; the average recoveries were 99.7％–100.4％. The results showed that there were differences in content between the root and aerial part of Rheum tanguticum Maxim.ex Balf. Conclusion HPLC method for simultaneous determination of contents of 6 contents of the aerial part of Rheum tanguticum Maxim.ex Balf can be used as the references for quality control.

Fingerprints of Rheum tanguticum from Qinghai Region by HPLC / 中草药

Objective To establish the HPLC fingerprints of Rheum tanguticum from Qinghai Region.Methods By RP-HPLC,acetonitrile and water including 0.04% H_3PO_4 as mobile phase,gradient elution,flow rate was 1.0 mL/min,the detection wavelength was 280 nm,and the temperature was 40 ℃.Results The RSD of peak areas and retention time of common peak in the test of precision,repeatability,and stability has not reached 5%,respectively.Average similarity was 0.925 in R.tanguticum collected from different habitats.Conclusion All above results show that this method is simple,practicable,and reliable.It can be used as a standard analysis method in the quality control of R.tanguticum from Guoluo Region in Qinghai Province.It also provides a theory foundation on which the species cultivated could replace the wild ones.