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Paper-based microfluidic devices based on 3D network polymer hydrogel for the determination of glucose in human whole blood

机译:基于3D网络聚合物水凝胶的纸基微流控装置用于测定人全血中的葡萄糖

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In this study, optical microfluidic paper analytical devices (μPADs) for glucose detection from whole blood samples with a small sample volume (2 μL) have been developed on a single paper. In the proposed method, a mushroom-shaped analytical device contains a sample inlet zone and a detection zone. When blood is dripped onto the inlet region of a μPAD, the plasma diffuses to the detection region. The detection region is implanted with a metallic three-dimensional (3D) polymer hydrogel vehicle. The gel vehicle consists of a copper complex that responds to oxygen changes and glucose oxidase (GOx) immobilized inside the gel as a bioactivity preservative. The phosphorescence of the copper complex is enhanced by oxygen consumed by detection of glucose with a limit of detection (S/N = 3) of 0.44 mM, and the total analysis of the sample is completed within 1 min. The validity of the proposed research is demonstrated using control samples and real-world whole blood samples of glucose concentrations ranging from 3 to 200 mM, and the detection results are shown to be in agreement with those obtained using a glucometer. Attaining a simple device for analysing glucose in human whole blood without any pretreatment procedures and having a broad sensing range while consuming a small sample volume remain challenging; thus, our new analytical device is of great interest.
机译:在这项研究中,已经在单张纸上开发了用于从小样本量(2μL)的全血样本中检测葡萄糖的光学微流纸分析设备(μPAD)。在所提出的方法中,蘑菇形的分析装置包括样品入口区和检测区。当血液滴到μPAD的入口区域时,血浆扩散到检测区域。该检测区域植入了金属三维(3D)聚合物水凝胶载体。凝胶媒介物由铜复合物组成,该铜复合物响应氧的变化和固定在凝胶内部的葡萄糖氧化酶(GOx)作为生物活性防腐剂。葡萄糖配合物消耗的氧气增强了铜配合物的磷光,其检测极限(S / N = 3)为0.44 mM,并且样品的总分析在1分钟内完成。使用对照样本和现实世界中全血样本中的葡萄糖浓度范围为3至200 mM证明了所提出研究的有效性,并且检测结果与使用血糖仪获得的结果一致。在没有任何预处理程序的情况下,获得一种用于分析人体全血中葡萄糖的简单设备,并且在消耗少量样品的同时具有宽广的感测范围仍然具有挑战性;因此,我们的新型分析仪引起了极大的兴趣。

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