Study on water-soluble constituents of Fritillaria unibracteata by HPLC fingerprints / 中国中药杂志

<p><b>OBJECTIVE</b>To establish a HPLC fingerprint of water-soluble constituents of Fritillaria unibracteata.</p><p><b>METHOD</b>Zorbax SB Aq C18 chromatographic column (4. 6 mm x 250 mm, 5 microm) was adopted for gradient elute with the mobile phase consisting of methanol and water. The flow rate was 1.0 mL x min(-1); the detection wavelength was 260 nm, and the temperature of sample manager was set at 25 degrees C. Similarity Evaluation System for Chromatographic Fingerprint of traditional Chinese medicine (version 2.0) published by the State Pharmacopeia Committee of China was adopted for the fingerprint analysis on the 11 batches of F. unibracteata herbs.</p><p><b>RESULT</b>The 11 batches of F. unibracteata herbs had 14 common peaks, nine of which were identified with good separating degrees. The similarities of the 11 batches were more than 0. 970, with good quality homogeneity.</p><p><b>CONCLUSION</b>The method is so accurate, highly reproducible and stable that it is suitable for the comprehensive quality evaluation of F. unibracteata herbs.</p>

Simultaneous determination of seven nucleosides and nucleobases in aqueous extracts of Fritillaria taipaiensis by HPLC-DAD / 中国中药杂志

<p><b>OBJECTIVE</b>To develop a high performance liquid chromatography coupled with a photodiode array detector (HPLC-DAD) method for simultaneous determination of 7 nucleosides and nucleobases in Fritillaria taipaiensis.</p><p><b>METHOD</b>The analyses were performed on an Agilent Zorbax-SB-Aq-C18 column (4.6 mm x 250 mm, 5 microm) eluted with water and methanol in gradient mode. The flow rate was 1.0 mL x min(-1). The detection wavelength was 260 nm. The temperature of sample manager was set at 25 degrees C, and the injection volume was 20 microL.</p><p><b>RESULT</b>The investigated compounds including uracil, cytidine, uridine, guanosine, thymidine, adenosine and adenine were shown good linearity (r > or = 0.999 8) over the tested ranges. The average recoveries were within 96.96% - 103.5% with RSD < or = 3.8%.</p><p><b>CONCLUSION</b>The accuracy, stability, repeatability and average recovery of the method are satisfying, and the seven nucleosides and nucleobases components in F. taipaiensis can be rapidly and accurately quantified by HPLC-DAD. This work provided helpful information for comprehensive quality evaluation of F. taipaiensis.</p>