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首页> 外文期刊>Electroanalysis >Reagentless amperometric immunosensor for alpha-fetoprotein based on gold Nanoparticies/TiO2 colloids/prussian blue modified platinum electrode
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Reagentless amperometric immunosensor for alpha-fetoprotein based on gold Nanoparticies/TiO2 colloids/prussian blue modified platinum electrode

机译:基于纳米金/ TiO2胶体/波斯蓝修饰铂电极的甲胎蛋白无试剂安培免疫传感器

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摘要

A novel reagentless amperometric immunosensor for the determination of alpha-fetoprotein (AFP) was prepared by immobilizing TiO2 colloids on Prussian blue (PB) modified platinum electrode, which yielded a positively charged interface with strong adsorption to deposit gold nanoparticles for immobilization of alpha-fetoprotein antibody (anti-AFP). The factors influencing the performance of the proposed immunosensors were studied in detail. Under the optimized conditions, cyclic voltammograms determination of AFP showed a specific response in two concentration ranges from 3.0 to 30.0 ng/mL and from 30.0 to 300.0 ng/mL with a detection limit of 1.0 ng/mL at a signal-to-noise ratio of 3. The proposed immunosensor exhibited high selectivity, good reproducibility, long-term stability (> 2 months) and good repeatability.
机译:通过将TiO2胶体固定在普鲁士蓝(PB)修饰的铂电极上,制备了一种用于测定甲胎蛋白(AFP)的新型无试剂安培免疫传感器,该电极产生带正电的界面,具有强吸附性,可沉积金纳米颗粒以固定甲胎蛋白。抗体(抗AFP)。详细研究了影响所提出的免疫传感器性能的因素。在优化的条件下,循环伏安法测定AFP在3.0至30.0 ng / mL和30.0至300.0 ng / mL的两个浓度范围内均显示出特异性响应,信噪比下的检测限为1.0 ng / mL图3.提出的免疫传感器显示出高选择性,良好的重现性,长期稳定性(> 2个月)和良好的重复性。

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