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05100

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5 . 1 方法提要
样品用甲醇溶解,以甲醇+0.05 % H3PO4 为流动相,使用ZORABX80AExtend 一Cl8 不锈钢柱和可变波长紫外检测器在260nm 波长下,用外标定量法对样品中大黄酸、大黄素、大黄酚及大黄素甲醚含量进行分离测定,以大黄素为标样用校正法对母药中芦荟大黄素含量进行分离测定
测定步骤
称取约0.149 (精确至0.0002g )及0.02g标品于100mL 的容量瓶中,用甲醇溶解稀释至刻度,摇匀,按下列顺序进样:a .标样溶液、b .试样溶液、c .试样溶液、d .标样溶液。
5 . 5 计算
将测得的两针试样溶液及试样前后两针标样溶液中大黄酸、大黄素、大黄酚及大黄素甲醚峰面积分别进行平均。试样中芦荟大黄素、大黄酸、大黄素、大黄酚及大黄素甲醚的质量百分含量x ( % )按下式计算:
式中:
Al 一相邻两针标样溶液中大黄酸、大黄素、大黄酚及大黄素甲醚峰面积的平均值;
A2 厂相邻两针试样溶液中芦荟大黄素、大黄酸、大黄素、大黄酚及大黄素甲醚峰面积的平均值;
m1 一大黄酸、大黄素、大黄酚及大黄素甲醚标样的质量,g ; m2:试样的质量,g ;
P 一标样中大黄酸、大黄素、大黄酚及大黄素甲醚的质量分数,%。
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ringzhu

木虫 (职业作家)



wypward(金币+1):谢谢参与 2010-09-04 21:29:58
05100(金币+15, 翻译EPI+1):自己已经凑合翻译了。但还是谢谢你。金币都奖励给你吧。 2010-09-06 11:15:40
5.1 Method Summary
Samples are dissolved in methanol.make methanol +0.05% H3PO4  the mobile phase. ZORABX80AExtend a Cl8 stainless steel column is used. variable wavelength UV detector is set at 260nm wavelength.

Separation and determination of rhein, emodin, chrysophanol in the samples are quantified by an external standard mode.

Emodin is used as standard sample to separate and determine the content of aloe emodin in the parent drug by correction methods.


Determination procedure
About 0.149 (accurate to 0.0002g) and 0.02g standard products are weighed and put  in 100mL volumetric flask, diluted with methanol to scale, shake, and inject samples according to the following sequence : a. Standard sample solution, b. Sample solution, c. Sample solution, d. Standard sample solution.


5.5 Calculation

Work out the average peak area of the two sample solution and two-pin standard samples before and after of rhein, emodin, chrysophanol and physcion,respectively.

Contents in x (%) of aloe emodin, rhein, emodin, chrysophanol and physcion in samples are calculated as follows:
PS:
Al means the average peak area of an adjacent two-pin standard sample solution of rhein, emodin, chrysophanol and Physcion ;

A2 means the average peak area of adjacent two-pin sample solution of aloe emodin, rhein, emodin, and emodin chrysophanol  ;

m1 1 means quality of the rhein, emodin, chrysophanol and Physcion  standard sample, g; m2: the quality of the sample, g;

P means the wt% of rhein, emodin, chrysophanol and physcion in the sample.
2楼2010-09-04 19:23:59
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