文献类型：期刊文献

英文题名：Magnetic nanoparticles coated with dithizone-modified chitosan for use in solid-phase extraction of copper(II)

作者：Zhang, Lei[1];Xiong, Zhichao;Zhang, Lingyi;Yu, Bohao;Zhang, Weibing

机构：[1]E China Univ Sci & Technol, Res Ctr Anal Test, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China

年份：2015

卷号：7

期号：5

起止页码：2050

外文期刊名：ANALYTICAL METHODS

收录：;EI(收录号：20151000608215);WOS:【SCI-EXPANDED(收录号:WOS:000350443800055)】；

基金：This work was financially supported by the 973 Project from the Ministry of Science and Technology of People's Republic of China (no. 2011CB910403), the National Natural Science Foundation of China (no. 21475044) and the Science and Shanghai Research Institute of Criminal Science and Technology.

语种：英文

外文关键词：Atomic absorption spectrometry - Extraction - Metal ions - Fourier transform infrared spectroscopy - Absorption spectroscopy - Nanoparticles - Scanning electron microscopy - Phase separation - Chitosan - Copper compounds - Nanomagnetics - Adsorption

摘要：A magnetic solid-phase extraction method for detection of trace copper(II) was developed by graphite furnace atomic absorption spectrometry. A novel adsorbent, consisting of magnetic nanoparticles coated with dithizone (DZ)-modified chitosan, was prepared. The adsorbent was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and energy dispersive spectrometry (EDS). Effects of pH, amount of adsorbent, adsorption time, elution condition, interference ions and adsorption capacity on the detection of trace copper ion were studied. Under the optimized conditions, the detection limit of the developed method was 0.18 mu g L-1 and the adsorption capacity was 210 mg g(-1). This adsorbent was successfully applied to the analysis of environmental water samples and certified reference materials.