期刊
TALANTA
卷 132, 期 -, 页码 557-563出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2014.09.043
关键词
Tri-iron tetroxide /graphene oxide nanocomposite; Magnetic solid-phase extraction; Heavy metal ions; Biological samples
资金
- National Nature Science Foundation of China [21075074]
A novel magnetic graphene oxide nanocomposite was synthesized by one-step coprecipitation method and characterized by transmission electron microscopy, X-ray photoelectron spectroscopy and vibrating sample magnetometer. The nanocomposite beard many intriguing properties, including chemical stability, high adsorption capacity, and superparamagnetic. These properties evoked great interest and desire of its exploration in magnetic solid-phase extraction of heavy metal ions from complex samples. Several parameters effecting the analytical performance, such as the sample pH, amounts of adsorbent, sample volumes, elution volumes, and coexisting ions, had been investigated in detail. The adsorbed metal ions were easy eluted by controlling the pH condition and the materials could be reused more than 20 times. Under the optimized conditions, the limits of detection were 0.016, 0.046, 0.395, 0.038, 0.157 mu g L-1 for Co2+, Ni2+, Cu2+, Cd2+, and Pb2+, respectively. The intra-day relative standard deviations (n = 5) were in the range of 1.8-5.5% at 10 mu g L-1. The proposed method was successfully applied to biological sample analysis and got excellent recoveries in the range of 81-113% even the matrix was complex. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据