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Study on sieving and purification of the Pollen Typhae |
LIU Yaping1 GAO Mingliang2 CHEN Peidong2 ZHOU Guisheng2 |
1.Department of Pharmacy, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province, Nanjing 210029, China;
2.College of Pharmacy, Nanjing University of Chinese Medicine, Jiangsu Province, Nanjing 210046, China |
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Abstract Objective To study the content of flavonoids changes in Pollen Typhae before and after the purification. Methods The content of flavonoid glycosides in the pollen grains and impurities after sieving of Pollen Typhae was determined by high performance liquid chromatography. A PRAZIS C18 (250 mm × 4.6 mm, 5 μm) column was used. Acetonitrile and 0.05% phosphoric acid gradient elution was used. The column temperature was set at 30℃ and the injection volume was 10 μL. Results The average recovery of typhaneoside was 96.67%, RSD was 1.70%; the content in pollen grains after 6-8 sieve was 4.05, 4.22 mg/g and 4.04 mg/g, respectively. Isorhamnetin-3-O-neohesperidin average recovery was 101.84%, RSD was 1.77%; the content in pollen grains was 3.50, 3.67 mg/g and 3.51 mg/g, respectively. Conclusion The content of flavonoids in pollen grains is the highest when the Pollen Typhae is purified by No. 7 sieve.
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