中药黄芩中金属元素与总黄酮含量测定

背景:中药疗效确切而副作用小,其原因除了自身的药理作用,也与中药中的微量元素有关。目的:测定中药中药黄芩中金属元素和总黄酮含量。设计:重复测量实验。单位:吉林医药学院,吉林医药学院附属医院。材料:黄芩,市售。芦丁标准品(F20050930,国药集团化学试剂有限公司)。方法:实验于2006-04/07在吉林医药学院中药微量元素研究室进行。选取黄芩粉碎、干燥至恒重,采用硝酸-高氯酸湿法消化,具体方法为:用分析天平准确称量1.0000g,每种平行取3份,置于25mL锥形瓶中,加浓硝酸10mL,封口过夜;次日分别加入浓硝酸10mL、高氯酸5mL,于电热板上缓慢加热,当剩下1mL左右时再加浓硝酸20mL、高氯酸5mL,继续消化,至溶液呈无色透明近干为止。用3%硝酸稀释溶解,转移至50mL容量瓶中,定容至刻度,混匀待测。用原子吸收分光光度计测定其宏量元素钠、钙、镁、钾和微量元素铁、锰、铜、锌等无机元素的含量,并采用醇提法,提取黄芩中总黄酮,用紫外分光光度法测定药物中总黄酮的含量。主要观察指标:观察黄芩中金属元素的含量及总黄酮含量。结果:中药黄芩中8种金属元素K、Ca、Na、Mg、Zn、Cu、Mn、Fe及总黄酮含量的测定结果如下:钾元素含量为(1098.5168±2.7319)μg/g;钙元素含量(6561.5526±78.7167)μg/g,;钠元素含量为(9530.4912±44.1766)μg/g;镁元素含量为(6555.4428±36.8603)μg/g;铁元素含量为(512.0750±5.1359)μg/g;铜元素含量为(2.9050±0.1342)μg/g;锌元素含量为(30.0810±0.7400)μg/g;锰元素含量为(12.4092±0.2477)μg/g;总黄酮含量为(17.4962±2.134)mg/g。结论:测定结果显示,黄芩中含有丰富的金属元素和黄酮类化合物。

Determination of the contents of mental elements and total fiavone in Scutellaria baicalensis Georgi

BACKGROUND: Traditional Chinese medicine (TCM) has clear efficacy and fewer side effects, because of its own pharmacological action, as well as the trace elements in it.OBJECTIVE: To determine the contents of metal elements and their total flavone in Scutellaria baicalensis Georgi (SBG).DESIGN: Repeated measurement trial.SETTING: Jilin Medical College, Affiliated Hospital of Jilin Medical College.MATERIALS: SBG was bought on the market. Rutoside sample(F 20050930, Sinopharm Group Chemical Reagent Co., Ltd.).METHODS: The experiment was carried out in the Department of Trace Element in Chinese Herbal Medicine, Jilin Medical College from April to July in 2006. SBG samples were dried and powdered then digested with nitric acid-perchloric acid wet method. And 1.000 0 g was weighed accurately, 3 portions were used for each kind of sample, placed in 25 mL coni cal flask, 10 mL concentrated HNO3 was added, then sealed for overnight.10 mL concentrated HNO3 and 5 mL HClO4 were added respectively on the next day, and slowly heated on the electric hot plate; when only about 1 mL left, 20 mL concentrated HNO3 and 5 mL HC1O4 were added for continuous digestion till the solution was colorless and clearing and almost dried. It was diluted and dissolved with 30 g/L nitric acid, then transferred to 50 mL volumetric flask, evenly mixed for measurement. Atomic absorption spectrophotometer was used to detect macroelement Na, Ca, Mg, K and trace element Fe, Mn, Cu, Zn. Alcohol extraction method was applied to extract the total flavone of SBG while UV spectrophotometry for the content of total flavone.MAIN OUTCOME MEASURES: The contents of metal elements and their total flavone.RESULTS: The contents of metal elements and total flavone in SBG were detected as follows: K (1 098.516 8±2.731 9) μg/g; Ca (6 561.552 6±78.716 7) μg/g; Na (9 530.491 2±44.176 6) μg/g; Mg (6 555.442 8±36.860 3) μg/g; Fe (512.075 0±5.135 9) μg/g; Cu (2.905 0±0.134 2) μg/g;Zn (30.081 0±0.740 0) μg/g; Mn (12.409 2±0.247 7) μg/g; Total flavone(17.496 2±2.134 4) mg/g.CONCLUSION: Metal element and their total flavone are rich in SBG.