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摘要
ABSTRACT OBJECTIVE:To determine osthole in Fufangshechuangzi
capsules for the quanlity control of this new preparation.METHOD:The samples were treated by ultrasonic
shaking for 15min with 50% ethanol as extraction solvant. The HPLC
method was penformed on Shimpack CLC-ODS column(5μm,150mm×4.6mm) with a mobile phase of methanol-water-tetrahydrofuran(70∶40∶5).The
flow rate of mobile phase was 1.0ml*min-1.A guard-column was packed with YWGC18H37(20mm×4.6mm,10μm).The UV detection was made at 317nm.The
column tempreture was 35℃.RESULTS:The recovery of this method was
98.52%(n=6).The method reproducibility was RSD=1.44%(n=5).CONCLUSION:The method could be used to control
the quality of Fufangshechuangzi capsules. 复方蛇床子胶囊由6味中药组成,其中蛇床子为君药之一。蛇床子中含蛇床子素,其为蛇床子的指标成分,而且其化学结构、性质均已十分清楚[1],故本品的含量测定选择蛇床子素为指标成分。由于该方由多种药材组成,组分复杂,采用一般方法难以分离测定蛇床子素,故本研究选用分离效果好、灵敏度高的高效液相色谱法为含量测定方法,并对其方法学进行了系统研究。 1 仪器、药品、试剂、色谱条件及方法可行性 1.1 仪器 |
图1 蛇床子素的紫外吸收光谱
图2 蛇床子素(A)、空白(B)和样品(C)的HPLC谱
2 方法与结果 2.1 标准曲线的绘制 表1 空白加样回收试验结果 |
编号 | 空白样品量/g | 加入蛇床 | 测得量/mg | 回收率/% |
1 | 0.3407 | 0.10755 | 0.10955 | 101.9 |
2 | 0.3465 | 0.10755 | 0.10848 | 100.9 |
3 | 0.3712 | 0.21510 | 0.21134 | 98.3 |
4 | 0.3435 | 0.21510 | 0.21271 | 98.9 |
5 | 0.3219 | 0.32265 | 0.31845 | 98.7 |
6 | 0.3367 | 0.32265 | 0.31729 | 98.3 |
表2 样品加样回收试验结果 |
编号 | 称样量/g | 加入蛇床 | 蛇床子素 | 测得量/mg | 回收率/% |
1 | 0.452 1 | 0.086 04 | 0.131 65 | 0.129 72 | 98.5 |
2 | 0.451 9 | 0.086 04 | 0.131 59 | 0.126 15 | 95.9 |
3 | 0.460 4 | 0.129 06 | 0.175 51 | 0.176 47 | 100.5 |
4 | 0.448 8 | 0.129 06 | 0.174 34 | 0.161 91 | 92.9 |
5 | 0.462 2 | 0.215 10 | 0.261 73 | 0.260 12 | 99.4 |
6 | 0.462 6 | 0.215 10 | 0.261 76 | 0.265 12 | 101.3 |
表3 蛇床子素溶液的稳定性.n=3 |
放置时间/h | 甲醇液含量/% | 乙醇液含量/% |
0 | 100 | 100 |
3 讨 论 3.1 在色谱条件的选择过程中,曾试用了文献方法[2~4]但均未获得满意的分离效果,用本实验方法的色谱条件可使蛇床子素峰得到完全分离,而且蛇床子素的保留时间适中。 参考文献 1 向仁德,傅晓红.蛇床子化学成分的研究.中草药,1984,15(9):14. (收稿1997-11-06) |