期刊
APPLIED SURFACE SCIENCE
卷 258, 期 18, 页码 6772-6776出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2012.03.057
关键词
Chromium speciation; Environmental and biological samples; FAAS; Magnetic solid phase extraction; Magnetic nanoparticles
类别
资金
- National Nature Science Foundation of China [20975031]
- Education Committee of Hubei Province [Q20102506]
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Wuhan University), Ministry of Education [ACBM2010004]
- Young and Middle-Aged Elitists' Scientific and Technological Innovation Team Project of Hubei Education Department of China [T201007]
A new method for Cr(III) speciation in seven kinds of environmental and biological samples by Fe3O2@ZrO2 nanoparticles magnetic solid phase extraction (MSPE) and flame atomic absorption spectrometry (FAAS) has been developed. Fe3O2@ZrO2 nanoparticles were simply prepared by sol-gel method, and the adsorptive behaviors of Cr(III) and Cr(VI) on Fe3O2@ZrO2 nanoparticles were assessed. At pH 8.0-9.0, Fe3O2@ZrO2 nanoparticles were selective towards Cr(III) but hardly Cr(VI). The retained Cr(III) was subsequently eluted with 3.0 mL of 0.5 mol L-1 HNO3 followed by magnetic decantation. Total chromium was determined after reduction of Cr(VI) to Cr(III) by ascorbic acid. Various parameters affecting Fe3O2@ZrO2 nanoparticles MSPE were optimized systematically. Under the optimum conditions, the adsorption capacity of Fe3O2@ZrO2 nanoparticles for Cr(III) is 22.5 mg g(-1) . With an enrichment factor (EF) of 25, detection limit of Cr(III) was 0.69 ng mL(-1), and the proposed method has been successfully applied for Cr(III) speciation in seven kinds of environmental and biological samples with satisfactory results. (C) 2012 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