Zhu Yong-qin, Shi Jie
Henan Provincial Institute for Food and Drug Control, Zhengzhou 450003, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2007 Dec;27(12):2585-7.
A hydride generation atomic fluorescence spectrometry method was developed for the determination of trace arsenic in CTM. A digestion system using HNO3-H2O2 under high pressure was applied for the pretreatment of the samples. The experimental conditions were optimized. Under the optimum conditions, there was a good linear relationship between the fluorescence intensity and arsenic concentration in the range of 0-80 microg x L(-1) with a correlation coefficient of 0.9999, while the detection limit was 0.069 microg x L(-1). Trace arsenic in the standard reference substance (GBW08501) was determined incording this way and the results for six times of analysis were in good agreement with certified value. The authors also studied the arsenic contents in three kinds of CTM by the working curve method and the results were satisfactory.
建立了一种氢化物发生原子荧光光谱法测定川芎嗪中的痕量砷。采用HNO3-H2O2高压消解体系对样品进行预处理。对实验条件进行了优化。在最佳条件下，荧光强度与砷浓度在0-80μg·L(-1)范围内呈良好的线性关系，相关系数为0.9999，检出限为0.069μg·L(-1)。用该方法测定了标准物质（GBW08501）中的痕量砷，6次分析结果与认定值吻合良好。作者还用工作曲线法研究了3种川芎嗪中的砷含量，结果令人满意。
