Colorimetric determination of copper(II) by using branched-polyethylenimine droplet evaporation on a superhydrophilic-superhydrophobic micropatterned surface,Microchimica Acta

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Colorimetric determination of copper(II) by using branched-polyethylenimine droplet evaporation on a superhydrophilic-superhydrophobic micropatterned surface
Microchimica Acta ( IF 5.3 ) Pub Date : 2019-10-16 , DOI: 10.1007/s00604-019-3805-y
Hong Shao ₁ , Xiaokun Wen ₁ , Yadan Ding ₁ , Xia Hong ₁ , Huiying Zhao ₂

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A colorimetric method is described for the determination of Cu(II). It is based on branched polyethylenimine (BPEI) droplet evaporation on a superhydrophilic-superhydrophobic polystyrene micropatterned surface. Exposure to Cu(II) leads to a color change from colorless to light blue and dark blue. The micropatterned surface was fabricated via combining electrospinning with oxygen plasma and served as a detection substrate. Analysis requires only a single drop of blood. The method has a linear response in the 5.0 μM to 2.5 mM Cu(II) concentration range which is within the physiological range (15.7 ∼ 23.6 μM). Compared to an assay in solution, the detection limit is decreased from 386 nM to 89 nM. Excellent selectivity over other metal ions and anions was achieved. Graphical abstract A rapid and sensitive colorimetric detection platform for Cu(II) was fabricated by using branched-polyethylenimine droplet evaporation on a superhydrophilic-superhydrophobic micropatterned surface. Only a single drop of blood was needed for the analysis. The sensitivity was improved about 4.3 times. A rapid and sensitive colorimetric detection platform for Cu(II) was fabricated by using branched-polyethylenimine droplet evaporation on a superhydrophilic-superhydrophobic micropatterned surface. Only a single drop of blood was needed for the analysis. The sensitivity was improved about 4.3 times.

中文翻译：

在超亲水-超疏水微图案表面上使用支化聚乙烯亚胺液滴蒸发比色测定铜 (II)

描述了一种用于测定 Cu(II) 的比色法。它基于在超亲水-超疏水聚苯乙烯微图案表面上的支化聚乙烯亚胺 (BPEI) 液滴蒸发。暴露于 Cu(II) 会导致颜色从无色变为浅蓝色和深蓝色。通过将静电纺丝与氧等离子体相结合来制造微图案表面，并作为检测基板。分析只需要一滴血。该方法在 5.0 μM 至 2.5 mM Cu(II) 浓度范围内具有线性响应，该范围在生理范围内（15.7 ∼ 23.6 μM）。与溶液中的检测相比，检测限从 386 nM 降低到 89 nM。实现了优于其他金属离子和阴离子的选择性。图形摘要通过在超亲水-超疏水微图案表面上使用支化聚乙烯亚胺液滴蒸发，制造了快速灵敏的 Cu(II) 比色检测平台。分析只需要一滴血。灵敏度提高了约4.3倍。通过在超亲水-超疏水微图案表面上使用支化聚乙烯亚胺液滴蒸发，制造了快速灵敏的 Cu(II) 比色检测平台。分析只需要一滴血。灵敏度提高了约4.3倍。通过在超亲水-超疏水微图案表面上使用支化聚乙烯亚胺液滴蒸发，制造了快速灵敏的 Cu(II) 比色检测平台。分析只需要一滴血。灵敏度提高了约4.3倍。通过在超亲水-超疏水微图案表面上使用支化聚乙烯亚胺液滴蒸发，制造了快速灵敏的 Cu(II) 比色检测平台。分析只需要一滴血。灵敏度提高了约4.3倍。

更新日期：2019-10-16

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