文献类型：期刊文献

英文题名：Preparation of dithizone grafted poly(allyl chloride) core-shell-shell magnetic composite microspheres for solid-phase extraction of ultra-trace levels of Pb(II), Cu(II) and Cr(III) ions

作者：Zhang, Lei[1];Gao, Xiaodi[1];Xiong, Zhichao[1];Zhang, Lingyi[1];Yu, Bohao[1];Zhang, Runsheng[2];Zhang, Weibing[1]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]Shanghai Publ Secur Bur, Shanghai Res Inst Criminal Sci & Technol, Shanghai Key Lab Crime Scene Evidence, Shanghai, Peoples R China

年份：2015

卷号：5

期号：72

起止页码：58873

外文期刊名：RSC ADVANCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000357798400090)】；

基金：This work was financially supported by the National 973 Program (no. 2011CB910403), the National Key Scientific Instrument and Equipment Development Project (2012YQ120044), the Science and Technology Commission of Shanghai Municipality (13142200300) and foundation of Shanghai Research Institute of Criminal Science and Technology.

语种：英文

摘要：A novel adsorbent with high adsorption efficiency and adsorption capacity was synthesized and applied to capture heavy metal ions by coupling with ICP-OES analysis. The adsorbent consists of a magnetite (Fe3O4) core, a shell composed of polymerized 3-(trimethoxysilyl) propyl methacrylate, and another poly(allyl chloride) shell composed of plenty of repetitive units, on which the complexing agent of dithizone was grafted by reaction with side chains of the polymer. Compared with traditional adsorbents, the core-shell- shell magnetic composite microspheres have advantages of quick magnetic separation, excellent mechanical strength and high adsorption capacity. The adsorbent was characterized by scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, vibrating sample magnetometer, X-ray photoelectron spectrum, nitrogen adsorption surface area (BET), and FT-IR. Effects of enrichment conditions including pH, amount of adsorbent and elution conditions, interference of other coexistent ions, and the kinetics characterization and adsorption capacity of the adsorbent were studied. Under the optimized conditions, the limits of detection of Pb(II), Cu(II) and Cr(III) ions were 0.87, 0.079 and 0.029 mu g L-1, respectively. The RSDs (c = 10 mu g L-1, n = 7) were 2.33%, 5.20% and 1.30%, respectively. This adsorbent was successfully applied to the analysis of certified reference materials, viz. a multi-element stock standard solution [(GBW(E) 082083] and tea-leaf [GBW(E) 080001], and environmental and biological samples.