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Determination of Copper in Water Samples after Solid-phase Extraction Using Dimethylglyoxime-modified Silica

机译：二甲基乙二肟改性硅胶固相萃取后水样中铜的测定

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摘要

This work describes the modification of silica gel with dimethylglyoxime, in order to prepare an effective sorbent for the preconcentration and determination of copper. The sorption capacity of dimethylglyoxime-modified silica-gel (DMGMS) was 71.37 mg g~(-1) and the optimum pH for the quantitative recovery of copper was found to be 5.0. The optimum flow rate, sorbent amount, and sample volume were 1 mL min~(-1), 300 mg, and 50 mL, respectively. 10 mL of 0.1 mol L~(-1) HCl was the most suitable eluent. The detection limit of copper was 6.0 ng mL~(-1). The recommended method, for the determination of copper, is simple and reliable, without any notable matrix effect and can be successfully applied to environmental water samples. Copper recovery in the range from 99-100% was obtained from seawater and thermal spring water using this method. The method was applied to standard reference materials, NIST-1515 (apple leaves) and NIST-1643e (simulated fresh water), for the determination of copper and the results were in good agreement with certified values.
机译：这项工作描述了用二甲基乙二肟对硅胶进行改性，以制备用于铜的预浓缩和测定的有效吸附剂。二甲基乙二肟改性硅胶（DMGMS）的吸附容量为71.37 mg g〜（-1），定量回收铜的最佳pH为5.0。最佳流速，吸附量和样品量分别为1 mL min〜（-1），300 mg和50 mL。 10 mL的0.1 mol L〜（-1）HCl是最合适的洗脱液。铜的检出限为6.0 ng mL〜（-1）。推荐的测定铜的方法简单可靠，没有明显的基体效应，可以成功地用于环境水样。使用这种方法可以从海水和温泉水中获得99-100％的铜回收率。该方法用于标准参考物质NIST-1515（苹果叶）和NIST-1643e（模拟淡水）中铜的测定，结果与标准值相符。

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  • 来源
    《Clean》 |2010年第4期|P.344-352|共9页
  • 作者

    Burcu Anilan; TevfikGedikbey; Sibel Tunali Akar;

  • 作者单位

    Department of Chemistry Education, Faculty of Education, Eskisehir Osmangazi University, Eskisehir, Turkey;

    rnDepartment of Chemistry, Faculty of Arts and Science, Eskisehir Osmangazi University, Eskisehir, Turkey;

    rnDepartment of Chemistry, Faculty of Arts and Science, Eskisehir Osmangazi University, Eskisehir, Turkey;

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  • 正文语种 eng
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  • 关键词

    adsorption; copper(II); dimethylglyoxime-modified silica gel; FAAS; preconcentration;

    机译：吸附铜（II）;二甲基乙二肟修饰的硅胶;FAAS;预浓缩;

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