Visual test of subparts per billion-level copper(II) by Fe3O4 magnetic nanoparticle-based solid phase extraction coupled with a functionalized gold nanoparticle probe.
Visual test of subparts per billion-level copper(II) by Fe3O4 magnetic nanoparticle-based solid phase extraction coupled with a functionalized gold nanoparticle probe.
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DOI：
10.1039/c2nr31753b
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发表时间：
2012-10
期刊：
影响因子：
6.7
通讯作者：
Zhiqiang Tan;Jing-fu Liu;G. Jiang
中科院分区：
文献类型：
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作者：
Zhiqiang Tan;Jing-fu Liu;G. Jiang
将Fe(3)O(4)磁性纳米颗粒固相萃取与金纳米颗粒目视检测相结合，建立了一种在30min内现场测定环境水样中铜(II)的新方法。用该方法处理200mL水样，加入12.5mgFe3O4纳米粒子，肉眼检测限为0.2μg L(-1)铜(II)。该方法对铜(II)具有很高的专属性，对除汞(II)以外的其他环境相关金属离子的容忍度至少为100倍(25倍)，并成功地用于自来水、河水和处理后废水中痕量铜(II)的测定，结果与电感耦合等离子体质谱(ICPMS)测定结果一致。
By combining Fe(3)O(4) magnetic nanoparticle-based solid phase extraction with a gold nanoparticle-based visual test, a novel method was developed for the field assay of Cu(ii) in environmental water at subparts per billion-levels within 30 min. When a 200 mL water sample was treated with 12.5 mg L(-1) Fe(3)O(4) nanoparticles by the proposed procedure, the detection limit with the naked eye was 0.2 μg L(-1) Cu(ii). The proposed method is very specific to Cu(ii), with tolerance against at least 100-fold amounts of other environmentally relevant metal ions except for Hg(ii) (25-fold), and was successfully applied to the detection of trace Cu(ii) in tap water, river water, and treated wastewater, and results agreed well with that determined by inductively coupled plasma-mass spectrometry (ICP-MS).