川党参中钙元素含量的测定

The Determination of Calcium Content in Sichuan Dangshen

在p H=11.0的氨性缓冲溶液中,钙与邻甲酚酞可以迅速形成紫色络合物,在572 nm处测其吸光度,计算川党参中钙元素的含量。钙标准曲线方程为:Y=0.5386x-0.025,线性相关系数r=0.9960。测定川党参中钙元素含量为3.747 mg/g。此试验方法操作简便,结果准确。实验结果可以为研究中药食补提供科学的依据。

In the pH=1 1.0 of ammonia in the buffer solution, calcium and a phenolphthalein can rapidly form a purple complex, measuring the absorbance at 572 nm, calculating the content of calcium in sichuan dangshen. Calcium standard curve equation is：Y=0.5386x-0.025, the linear correlation coefficient r=0.9960. Determination of calcium content in sichuan and dangshen is 3.747 mg/g. The test method is simple, the result is accurate. The experimental results provide scientific basis for study to eat the traditional Chinese medicine.