Candir Secil, Narin Ibrahim, Soylak Mustafa
Erciyes University, Institute of Health Sciences, Department of Analytical Chemistry, 38039 Kayseri, Turkey.
Talanta. 2008 Oct 19;77(1):289-93. doi: 10.1016/j.talanta.2008.06.024. Epub 2008 Jun 27.
A cloud point extraction (CPE) procedure has been developed for the determination trace amounts of Cr(III), Pb(II), Cu(II), Ni(II), Bi(III), and Cd(II) ions by using flame atomic absorption spectrometry. The proposed cloud point extraction method was based on cloud point extraction of analyte metal ions without ligand using Tween 80 as surfactant. The surfactant-rich phase was dissolved with 1.0 mL 1.0 mol L(-1) HNO(3) in methanol to decrease the viscosity. The analytical parameters were investigated such as pH, surfactant concentration, incubation temperature, and sample volume, etc. Accuracy of method was checked analysis by reference material and spiked samples. Developed method was applied to several matrices such as water, food and pharmaceutical samples. The detection limits of proposed method were calculated 2.8, 7.2, 0.4, 1.1, 0.8 and 1.7 microg L(-1) for Cr(III), Pb(II), Cu(II), Ni(II), Bi(III), and Cd(II), respectively.
已开发出一种浊点萃取（CPE）方法，用于通过火焰原子吸收光谱法测定痕量的Cr(III)、Pb(II)、Cu(II)、Ni(II)、Bi(III)和Cd(II)离子。所提出的浊点萃取方法基于使用吐温80作为表面活性剂，在无配体的情况下对分析物金属离子进行浊点萃取。富表面活性剂相用1.0 mL 1.0 mol L(-1) HNO(3)的甲醇溶液溶解以降低粘度。研究了分析参数，如pH、表面活性剂浓度、孵育温度和样品体积等。通过参考物质和加标样品对方法的准确性进行了分析检查。所开发的方法应用于水、食品和药物样品等多种基质。所提出方法对Cr(III)、Pb(II)、Cu(II)、Ni(II)、Bi(III)和Cd(II)的检测限分别计算为2.8、7.2、0.4、1.1、0.8和1.7 μg L(-1)。
