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首页> 外文期刊>The Analyst: The Analytical Journal of the Royal Society of Chemistry: A Monthly International Publication Dealing with All Branches of Analytical Chemistry >Ultra-facile and rapid colorimetric detection of Cu2+ with branched polyethylenimine in 100% aqueous solution
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Ultra-facile and rapid colorimetric detection of Cu2+ with branched polyethylenimine in 100% aqueous solution

机译：用支化聚乙烯亚乙基在100％水溶液中的超容易和快速比色度检测

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摘要

The detection of copper ion (Cu2+) has become a long-term and arduous task in the field of environmental monitoring and human health. Current methods based on branched polyethylenimine (BPEI) for the detection of Cu2+ more or less suffer from being time-consuming and having a high cost or complex surface modifications. Herein, an ultra-facile and rapid colorimetric method was explored to detect Cu2+ in 100% aqueous solution by a direct format using only BPEI. Cu2+ could be captured by BPEI and form BPEI-Cu2+ complexes, which resulted in a color change from colorless to blue within 5 s, associated with the strong absorption peak at 278 nm. The lower the molecular weight and the concentration of BPEI are, the lower the detection limit is. When the molecular weight and the concentration of BPEI were 600 and 21.5 mg L-1, respectively, the detection limit was calculated to be 1.21 mu M, and the linear range was 2 mu M to 50 mu M. Besides, BPEI also had an excellent selectivity toward Cu2+. This ultra-facile, rapid and inexpensive method offers great potential for various applications in biomedicine, environmental protection, food safety and so on.
机译：铜离子（CU2 +）的检测已成为环境监测和人类健康领域的长期和艰巨的任务。基于支链聚乙烯（BPEI）的目前方法用于检测Cu2 +的+或多或少受到耗时和具有高成本或复杂的表面修饰。在此，探讨了超容易和快速的比色法，以通过仅使用BPEI的直接形式检测100％水溶液中的Cu2 +。 Cu2 +可以通过BPEI捕获并形成BPEI-Cu 2 +复合物，其在5秒内从无色到蓝色的颜色变化，与278nm处的强吸收峰相关。分子量和BPEI的浓度越低，检测极限越低。当分子量和BPEI的浓度分别为600和21.5mg L-1时，将检测限计算为1.21μm，线性范围为2μm至50μm。此外，Bpei也有一个对Cu2 +的优异选择性。这种超便利，快速且廉价的方法为生物医学，环保，食品安全等各种应用提供了巨大的潜力。

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