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目的测定非种仁部位(根、茎和叶)及不同产地、不同采收期的薏苡中薏苡素的含量,并评价品质,寻找新的药用部位。方法采用HPLC法,以Diamonsil(R)C18为色谱柱,乙腈-水(50:50)为流动相,流速1 ml.min-1,柱温25℃,检测波长232 nm。结果薏苡素的含量为根>叶>茎;不同产地中,根、茎中薏苡素的含量均以云南大度岗为最高,分别为16.1155、5.6659 mg.g-1;叶中的薏苡素含量以陕西汉中汉台区为最高,为10.6258 mg.g-1;6~11月采收的薏苡素的含量呈下降趋势。结论该方法操作简便,定量准确,重复性好。建议可以薏苡根、茎、叶入药,不在花果期(7~10月)采收。
Objective To determine the content of Coixin in non-seed (root, stem and leaf), Coix lachryma-jobi (Coix lachryma-jobi) at different harvesting and harvesting periods, and to evaluate the quality and find new medicinal sites. Methods The HPLC method was based on Diamonsil (R) C18 column with acetonitrile-water (50:50) as the mobile phase and the flow rate was 1 ml.min-1. The detection wavelength was 232 nm at 25 ℃. Results The content of Coixin was root> leaf> stem. The contents of coixazhion in roots, stems and stems in different habitats were the highest in Dazuogang of Yunnan, which were 16.1155 and 5.6659 mg.g-1, respectively. Hanzhong Hantai in Shaanxi Province as the highest, 10.6258 mg.g-1; 6 to 11 months of the recovery of the content of coixailin decreased. Conclusion The method is simple, accurate and reproducible. It is recommended that Coix roots, stems and leaves into medicine, not in the flowering period (July to October) harvesting.