Disposable Printed Electrode Made with Chinese Shellac and Carbon Black for Melatonin Detection

IF 4.6 Q1 CHEMISTRY, ANALYTICAL
Ana Luiza Molina de Cezar, Rafaela Cristina Freitas, Amanda Neumann and Bruno Campos Janegitz*, 
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引用次数: 0

Abstract

Screen-printed electrodes (SPEs) are an innovative technology in electrochemical sensors, offering advantages such as easy fabrication, large-scale production, low cost, and potential for miniaturization. These electrodes can be disposable and customized for various applications. Due to these advantages, SPEs are gaining attention in fields such as medicine and pharmacy. In this study, an electrochemical sensor was developed through screen-printing, using new conductive ink, compounded with carbon black, Chinese shellac, and acetone. The device was characterized by different approaches to analyze its characteristics, including scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetry, and contact angle. Also, the electrochemical characterizations were performed by using cyclic voltammetry and impedance spectroscopy. The sensor was employed to detect melatonin, a sleep-regulating hormone, and, under optimized parameters, the analytical curve by differential pulse voltammetry exhibited a linear range from 1.0 to 100 μmol L–1, with a limit of detection of 0.1 μmol L–1. The device was applied to synthetic urine samples using the addition and recovery method, yielding recovery values from 86.7 to 110%. The results indicate that the conductive ink is suitable for manufacturing printed electrodes, and the device proved promising for melatonin detection.

紫胶炭黑一次性印刷电极用于褪黑激素检测
丝网印刷电极(spe)是电化学传感器领域的一项创新技术,具有易于制造、大批量生产、成本低、小型化潜力大等优点。这些电极可以是一次性的和定制的各种应用。由于这些优点,spe在医学和药学等领域受到关注。在这项研究中,通过丝网印刷开发了一种电化学传感器,使用新的导电油墨,与炭黑,紫胶和丙酮复合。采用扫描电子显微镜、傅里叶变换红外光谱、x射线衍射、热重法和接触角等方法对该器件进行了表征。并用循环伏安法和阻抗谱法对其进行了电化学表征。该传感器用于睡眠调节激素褪黑激素的检测,在优化参数下,差分脉冲伏安法的分析曲线在1.0 ~ 100 μmol L-1范围内呈线性关系,检测限为0.1 μmol L-1。将该装置应用于合成尿液样品,采用添加回收法,回收率为86.7 ~ 110%。结果表明,导电墨水适合制造印刷电极,并且该装置被证明是褪黑素检测的有希望的。
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来源期刊
ACS Measurement Science Au
ACS Measurement Science Au 化学计量学-
CiteScore
5.20
自引率
0.00%
发文量
0
期刊介绍: ACS Measurement Science Au is an open access journal that publishes experimental computational or theoretical research in all areas of chemical measurement science. Short letters comprehensive articles reviews and perspectives are welcome on topics that report on any phase of analytical operations including sampling measurement and data analysis. This includes:Chemical Reactions and SelectivityChemometrics and Data ProcessingElectrochemistryElemental and Molecular CharacterizationImagingInstrumentationMass SpectrometryMicroscale and Nanoscale systemsOmics (Genomics Proteomics Metabonomics Metabolomics and Bioinformatics)Sensors and Sensing (Biosensors Chemical Sensors Gas Sensors Intracellular Sensors Single-Molecule Sensors Cell Chips Arrays Microfluidic Devices)SeparationsSpectroscopySurface analysisPapers dealing with established methods need to offer a significantly improved original application of the method.
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