文献类型：期刊文献

英文题名：Simultaneous determination of seven metal ions in water samples by solid-phase extraction on polyacrylonitrile activated carbon fibres

作者：Zhang, Lingfan[1,2]; Liu, Xin[1]; Xia, Wei[1]; Zhang, Yulong[1]; Zhang, Wenqing[1]

机构：[1] School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China; [2] Research Center of Analysis and Test, East China University of Science and Technology, Shanghai 200237, China

年份：2014

卷号：94

期号：7

起止页码：728

外文期刊名：International Journal of Environmental Analytical Chemistry

收录：EI(收录号：20142017720960)

语种：英文

外文关键词：Solutions - Trace analysis - Chromium compounds - Extraction - Light emission - Plasma diagnostics - Trace elements - Bismuth compounds - Lead compounds - Activated carbon - Optical emission spectroscopy - Copper compounds - Inductively coupled plasma - Metals - Nitric acid - Spectrometry

摘要：A new solid-phase extraction method utilising polyacrylonitrile activated carbon fibres (PAN-ACFs) as adsorbent was developed for the preconcentration of trace metal ions prior to their determination by inductively coupled plasma optical emission spectrometry (ICP-OES). The PAN-ACFs oxidised with nitric acid were characterised by FT-IR, XRD, SEM and BET analysis. Then the resulting PAN-ACFs were used as solid-phase adsorbent for simultaneously determination of trace Al(III), Be(II), Bi(III), Cr(III), Cu(II), Fe(III) and Pb(II) ions in aqueous solutions. The influences of the analytical parameters on the recoveries of the studied ions were investigated. The optimum experimental conditions of the proposed method were pH: 6.0; eluent concentration and volume: 3.0 mL of 1.5 mol L-1 nitric acid; flow rates of sample and eluent solution: 1.5 mL min-1. The preconcentration factors were found to be 67 for Al(III), Bi(III); 83 for Cr(III), Cu(II), Fe(III) and 50 for Be(II), Pb(II). The precision of this method was in range of 1.5%~3.5% and the detection limit of this metal ions was between 0.06~1.50 μg L-1. The developed method was validated by the analysis of a certified reference sample and successfully applied to the determination of trace metal ions in water samples with satisfactory results. ? 2014 ? 2014 Taylor & Francis.