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A novel gold nanoparticle decorated nanocrystalline zeolite based electrochemical sensor for the nanomolar simultaneous detection of cysteine and glutathione

机译：新型金纳米粒子修饰的纳米晶沸石基电化学传感器，用于纳摩尔同时检测半胱氨酸和谷胱甘肽

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摘要

In this work, highly dispersed gold nanoparticle decorated nanocrystalline zeolite was synthesized by the electrostatic interaction between the functionalized gold nanoparticles and functionalized nanocrystalline zeolite. An electrochemical sensor based on the gold nanoparticle decorated nanocrystalline zeolite was developed for the nanomolar simultaneous detection of cysteine and glutathione with high sensitivity, selectivity, and remarkably low detection limit. A wide linear range was obtained from 2 nM to 800 mu M and 3 nM to 800 mu M with a limit of detection of 0.3 nM and 0.6 nM for cysteine and glutathione, respectively. The analytical performance of the developed sensor was demonstrated in the determination of cysteine and glutathione in commercial pharmaceutical preparations with satisfactory results even in the presence of several amino acids. The proposed methodology provides promising application in clinical diagnostic and drug analysis.
机译：在这项工作中，通过功能化的金纳米粒子和功能化的纳米晶沸石之间的静电相互作用，合成了高度分散的金纳米粒子修饰的纳米晶沸石。开发了一种基于金纳米粒子修饰的纳米晶沸石的电化学传感器，用于纳摩尔同时检测半胱氨酸和谷胱甘肽，具有高灵敏度，高选择性和极低的检测限。线性范围从2 nM至800μM和3 nM至800μM，半胱氨酸和谷胱甘肽的检出限分别为0.3 nM和0.6 nM。商用传感器中半胱氨酸和谷胱甘肽的测定证明了开发的传感器的分析性能，即使在存在几种氨基酸的情况下，也具有令人满意的结果。所提出的方法在临床诊断和药物分析中提供了有希望的应用。

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