浊点萃取-石墨炉原子吸收光谱法检测中成药镉残留量  

Determination of Cadmium Residues in Chinese Traditional Medicine by Cloud Point Extraction-Graphite Furnace Atomic Absorption Spectrometry

作　　者：李延志[1] 张弦[1] 

机构地区：[1]广东省药品检验所,广州市惠福西路进步里2号510180

出　　处：《光谱实验室》2010年第3期933-936,共4页Chinese Journal of Spectroscopy Laboratory

基　　金：广东省科技厅资助项目(2007B031407003);广州市科技局资助项目(2007Z2-E5061);广东省药品检验所资助项目(项目编号:SN20071215)

摘　　要：建立了中成药镉残留量的浊点萃取-石墨炉原子吸收光谱法。样品先经消解,再以非离子表面活性剂浊点萃取富集消解液中的镉,石墨炉原子吸收光谱法测定镉含量。本方法检出限可达0.008ng/mL;加标回收率94.0%—108.5%;线性范围为0—10ng/mL(r=0.9995)。结果表明,采用浊点萃取可提高石墨炉原子吸收光谱法测镉的灵敏度、准确性、重复性和抗干扰能力。The method for determination of cadmium in Chinese traditional medicine by cloud point extraction-graphite furnace atomic absorption spectrometry was developed.After samples were pre-digested,trace cadmium was concentrated by non-ionic surfactant cloud point extraction and determined by the graphite furnace atomic absorption spectrometry.It was found absorbance was linear to the concentration of cadmium in the range of 0—10ng/mL（r=0.9995）.The detection limit is 0.008ng/mL with the recovery of 94.0%—108.5%.The proposed method is sensitive,accurate and has been successfully applied to the determination of Chinese traditional medicine with satisfactory results.

关 键 词：浊点萃取 石墨炉原子吸收光谱法 镉 

分 类 号：O657.31[理学—分析化学]