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A fast and facile electrochemical method for the simultaneous detection of epinephrine, uric acid and folic acid based on ZrO2/ZnO nanocomposites as sensing material
Analytica Chimica Acta ( IF 5.7 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.aca.2020.01.012
Qiwen Wang 1 , Haipei Si 1 , Lihui Zhang 1 , Ling Li 1 , Xiaohong Wang 1 , Shengtian Wang 1
Affiliation  

A novel electrochemical sensor based on ZrO2 and ZnO hybrid nanocomposites was developed for simultaneous determination of epinephrine (EA), uric acid (UA) and folic acid (FA) with the highly selective and ultrasensitive. The nanocomposites have been synthesized by chemical precipitation and thermal calcine method with economical, eco-friendly and practical nature. Their structure and electrochemical properties were investigated by X-ray diffraction (XRD), X-ray photo electron spectroscopy (XPS), scanning electron microscopy (SEM) and electrochemical techniques. The results reveal that the ZrO2/ZnO nanocomposites can possesses highly exposed catalytic sites, favorable conductivity, and the sensor excellent signal response for EP, UA and FA under the optimal condition. The electrochemical sensing platform has a low detection limit of 0.039 μM, 0.29 μM and 0.037 μM and a wide detection range of 0.8-420 μM, 10-2400 μM and 2-480 μM, respectively. It was also tested with a human blood serum sample at physiological pH with recovery 97.3-103.8% and relation standard deviation less than 5%. It indicates that the electrochemical sensors has a hopeful capacity of extensive applications in bioanalysis and diseases diagnosis.

中文翻译:

基于 ZrO2/ZnO 纳米复合材料作为传感材料同时检测肾上腺素、尿酸和叶酸的快速简便的电化学方法

开发了一种基于 ZrO2 和 ZnO 混合纳米复合材料的新型电化学传感器,用于同时测定肾上腺素 (EA)、尿酸 (UA) 和叶酸 (FA),具有高选择性和超灵敏性。纳米复合材料是通过化学沉淀法和热煅烧法合成的,具有经济、环保和实用的特点。通过X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)和电化学技术研究了它们的结构和电化学性能。结果表明,在最佳条件下,ZrO2/ZnO 纳米复合材料具有高度暴露的催化位点、良好的导电性以及传感器对 EP、UA 和 FA 的优异信号响应。电化学传感平台的检测下限为 0.039 μM,0. 29 μM 和 0.037 μM,检测范围分别为 0.8-420 μM、10-2400 μM 和 2-480 μM。它还在生理 pH 值下用人血清样品进行了测试,回收率为 97.3-103.8%,相关标准偏差小于 5%。这表明电化学传感器在生物分析和疾病诊断方面具有广阔的应用前景。
更新日期:2020-04-01
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