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Highly Hydrophilic Polymer Composite Modified Electrode for Trace Copper Detection Based on Synergetic Electrostatic Attractions and Chelating Interactions
Electroanalysis ( IF 2.7 ) Pub Date : 2020-07-10 , DOI: 10.1002/elan.202000025 Jianhui Wang 1 , Donglin Liu 1 , Yongle Liu 1 , Faxiang Wang 1 , Shouen Huang 1 , Xin Luo 1 , Dongmin Liu 1 , Donger Chen 1 , Jiaqian Wei 1 , Jingheng Ning 1
Electroanalysis ( IF 2.7 ) Pub Date : 2020-07-10 , DOI: 10.1002/elan.202000025 Jianhui Wang 1 , Donglin Liu 1 , Yongle Liu 1 , Faxiang Wang 1 , Shouen Huang 1 , Xin Luo 1 , Dongmin Liu 1 , Donger Chen 1 , Jiaqian Wei 1 , Jingheng Ning 1
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A new electrochemical sensor for Cu2+ detection by square wave voltammetry with high sensitivity has been constructed, based on a composite of sodium carboxymethyl cellulose and Nafion. Starting from these two polymers that are rich of hydrophilic groups in backbones, a highly negative‐charged composite has been easily prepared, which displays outstanding ability to adsorb and enrich Cu2+ onto the electrode surface through both electrostatic attractions and chelating interactions. After optimizing test conditions, this new sensor exhibits a good linear signal response to Cu2+ in a concentration range from 1.0 nΜ to 50.0 nM with a limit of detection of 0.6 nM (S/N=3), as well as good anti‐interference for commonly co‐existing metal ions. Besides, this new electrochemical copper sensor has been successfully applied to detect trace Cu2+ in natural water samples with satisfactory recoveries of 98–104 %. These findings provide a new simple but effective way for the determination of heavy metal ions in environmental pollutants.
中文翻译：
基于协同静电吸引力和螯合相互作用的高亲水性高分子复合痕量铜检测电极
基于羧甲基纤维素钠和Nafion的复合物，构建了一种新型的方波伏安法检测Cu 2+的新型电化学传感器。从这两种在主链中都具有亲水基团的聚合物开始，就很容易制备出高度带负电荷的复合材料，该复合材料具有出色的通过静电引力和螯合相互作用将Cu 2+吸附和富集到电极表面的能力。经过优化测试条件后，这种新型传感器对Cu 2+表现出良好的线性信号响应浓度范围为1.0 nM至50.0 nM，检出限为0.6 nM（S / N = 3），并且对常见的金属离子具有良好的抗干扰性。此外，这种新型电化学铜传感器已成功应用于天然水样品中痕量Cu 2+的检测，回收率达98–104％。这些发现为测定环境污染物中的重金属离子提供了一种简单而有效的新方法。
更新日期：2020-07-10
中文翻译：
基于协同静电吸引力和螯合相互作用的高亲水性高分子复合痕量铜检测电极
基于羧甲基纤维素钠和Nafion的复合物，构建了一种新型的方波伏安法检测Cu 2+的新型电化学传感器。从这两种在主链中都具有亲水基团的聚合物开始，就很容易制备出高度带负电荷的复合材料，该复合材料具有出色的通过静电引力和螯合相互作用将Cu 2+吸附和富集到电极表面的能力。经过优化测试条件后，这种新型传感器对Cu 2+表现出良好的线性信号响应浓度范围为1.0 nM至50.0 nM，检出限为0.6 nM（S / N = 3），并且对常见的金属离子具有良好的抗干扰性。此外，这种新型电化学铜传感器已成功应用于天然水样品中痕量Cu 2+的检测，回收率达98–104％。这些发现为测定环境污染物中的重金属离子提供了一种简单而有效的新方法。
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