石墨炉原子吸收法直接测定生物液体样品中砷的方法研究

Determination of arsenic in biological fluids by electrothermal atomic absorption spectrometry

目的:建立测定生物液体样品中砷的新方法。方法:应用Triton X-100稀释样品,横向塞曼石墨炉原子吸收光谱法直接测定样品中痕量砷。结果:选定了最佳测量条件,该方法的灵敏度、精密度均能满足检测工作的需要。本法对砷的最低检出量为0.73 pg,回收率在82%～99%之间。结论:本法简便、快速、准确,灵敏度和精密度高。适用于一般生物液体样品中痕量砷的测定。

Objectlve：To establish a new method for determination of arsenic in biological fluids. Methods：The samples were diluted in a mediμ m containing Triton X - 100 before being introduced directly into the furnace. Then they were detected by Zeeman GFAAS. Results：Under the best condition, the sensitivity and precision were suitable for the determination while the rate of recovery was controlled between 82% to 99%, The lowest detection limit of arsenic was O, 73 pg. Conclusion：This method is simple, quick, accurate and sensitive. It＇s a very good method for measuring arsenic in biological fluids.