Department of Civil and Enviromental Engineering, The University Of New South Wales, Sydney, NSW, 2052, Australia.
Biol Trace Elem Res. 2012 Dec;150(1-3):403-10. doi: 10.1007/s12011-012-9467-9. Epub 2012 Jun 17.
We have developed a facile and highly sensitive sorbent for cadmium and lead ions. It is based on Fe₃O₄ nanoparticles functionalized with a derivative of picoline and was characterized by scanning electron microscopy, differential thermographic analysis, and elemental analysis. The material can be applied to the preconcentration of lead and cadmium ions. Factors such as the type, concentration and volume of eluent, the pH of the sample solution, the time for extraction, and the volume of the sample were studied. The effects of a variety of ions on preconcentration and recovery of these ions were also investigated. The ions were determined by FAAS, and the limits of detection are <0.8 and <0.061 μg L⁻¹ for lead and cadmium, respectively. Recoveries and precisions are >98.0 % and <1.3 %, respectively. The method was validated by analyzing several certified leaf reference materials.
我们开发了一种简便且高灵敏度的镉和铅离子吸附剂。它基于用吡啶衍生物功能化的 Fe₃O₄ 纳米粒子，并通过扫描电子显微镜、差示热分析和元素分析进行了表征。该材料可用于铅和镉离子的预浓缩。研究了洗脱剂的类型、浓度和体积、样品溶液的 pH 值、萃取时间和样品体积等因素。还研究了各种离子对这些离子的预浓缩和回收的影响。通过 FAAS 测定了这些离子，铅和镉的检出限分别为 <0.8 和 <0.061 μg L⁻¹。回收率和精密度分别大于 98.0 %和小于 1.3 %。该方法通过分析几种已认证的叶片参考材料进行了验证。
