Zhang Ling, Rao Zhi-Jun, Guan Yuan-Yuan, Zhang Hai-Ming
Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Jiangxi College of Traditional Chinese Medicine, Nanchang 330004, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2010 Dec;30(12):3421-4.
The present paper is aimed to establish the method of determining the strontium in M. nitida Benth. var. hirsutissima. Z. Wei. by means of air-acetylene flame atomic absorption spectra, and also provide reference for the determination of the strontium in other traditional Chinese medicine. M. Nitida Benthvarhirsutissima Z. Wei. was taken as the object. The authors used nitric-perchloric acid as digestion solution to digest samples by microwave which was controlled by pressure, and used EDTA-2Na as the releasing agent to add in the samples for determining the strontium in M. nitida Benth. var. hirsutissima. Z. Wei. by FAAS. The results showed that the samples were entirely digested by microwave. The working curve was Y = 0.036 5x -0.001 1, r = 0.999 4, the range was 0-1.6 microg x mL(-1), the average recovery rate was 101.5% with RSD 2.04%, and the method detection limit was 0.008 2 microg x mL(-1) (n = 21). It is concluded that this method is simple and accurate. It has high sensitivity and can be effectively used for determining the strontium in this traditional Chinese medicine.
本文旨在建立用空气-乙炔火焰原子吸收光谱法测定毛钩藤中锶的方法，为其他中药中锶的测定提供参考。以毛钩藤为研究对象，采用硝酸-高氯酸为消解液，通过压力控制微波消解样品，以EDTA-2Na为释放剂加入样品中，用火焰原子吸收光谱法测定毛钩藤中的锶。结果表明，样品经微波消解完全。工作曲线为Y = 0.036 5x -0.001 1，r = 0.999 4，线性范围为0-1.6 μg·mL-1，平均回收率为101.5%，相对标准偏差为2.04%，方法检出限为0.008 2 μg·mL-1（n = 21）。结论是该方法简便、准确，灵敏度高，可有效用于该中药中锶的测定。
