Selective separation and preconcentration of copper (II) in environmental samples by the solid phase extraction on multi-walled carbon nanotubes.
Selective separation and preconcentration of copper (II) in environmental samples by the solid phase extraction on multi-walled carbon nanotubes.
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DOI：
10.1016/j.jhazmat.2009.03.032
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发表时间：
2009-09
影响因子：
13.6
通讯作者：
M. Soylak;Omer Ercan
中科院分区：
文献类型：
--
作者：
M. Soylak;Omer Ercan
研究了一种固相萃取方法，用于在火焰原子吸收光谱测定之前对多壁碳纳米管 (MWNT) 上的铜 (II) 进行选择性分离和预富集。在pH 7.0 的MWNT 柱上实现定量吸附，然后用2M HNO3 定量洗脱柱上保留的Cu(II) 含量。研究了分析参数（包括溶液 pH 值、洗脱液类型、样品体积、洗脱液流速、基质离子等）的影响，以优化所提出的程序。预富集系数为 60。铜 (II) 的检测限为 1.46μg/L。该方法用于环境样品中铜的测定，获得了重复性好的结果。
A solid phase extraction method for selective separation–preconcentration of copper (II) on multi-walled carbon nanotubes (MWNTs) prior to its flame atomic absorption spectrometric determinations has been investigated. The adsorption was achieved quantitatively on MWNTs column at pH 7.0, then the retained Cu(II) contents on the column were quantitatively eluted with 2M HNO3. The effects of analytical parameters including pH of the solution, eluent type, sample volume, flow rates of eluent, matrix ions etc. were investigated for optimization of the presented procedure. The preconcentration factor was 60. The detection limit for copper (II) was found as 1.46μg/L. The method was applied to the determination of copper in environmental samples and reproducible results were obtained.