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Electrochemical Detection of Epinephrine Based on a Screen-printed Electrode Modified with NiO−ERGO Nanocomposite Film
Electroanalysis ( IF 2.7 ) Pub Date : 2021-09-01 , DOI: 10.1002/elan.202100394
Ozlem Gunes 1 , Adem Sarilmaz 2 , Salih Bas 1 , Mustafa Ozmen 1 , Faruk Ozel 2 , Mustafa Ersoz 1
Affiliation  

This study presents a new electrochemical sensor (NiO−ERGO/SPE) for sensitive and selective detection of epinephrine (EPI) on the screen-printed electrode (SPE) which is modified with a nanocomposite film consisting of electrochemically reduced graphene oxide and NiO nanoparticles. After surface functionalization, structural and electrochemical characterization of NiO−ERGO film, DPV signals of NiO−ERGO/SPE towards the oxidation of EPI exhibited a linear correlation in the concentration range of 0.025 μM to 175 μM with a detection limit of 0.015 μM, which reveals NiO−ERGO film is manifested a good electrocatalytic activity for EPI detection compared with the previous reports. The selectivity of NiO−ERGO film was also tested on a very wide scale of possible interferents (ascorbic acid, uric acid, dopamine, lactic acid, phenylalanine, tyrosine, tryptophan, Li+, Na+, K+, Ca2+, and Zn2+). Moreover, to evaluate the applicability of the proposed sensor for real sample analysis, NiO−ERGO/SPE was successfully utilized for the determination of EPI in pharmaceutical samples.

中文翻译:

基于NiO−ERGO纳米复合膜改性丝网印刷电极的肾上腺素电化学检测

本研究提出了一种新的电化学传感器 (NiO-ERGO/SPE),用于在丝网印刷电极 (SPE) 上灵敏和选择性地检测肾上腺素 (EPI),该电极用由电化学还原的氧化石墨烯和 NiO 纳米颗粒组成的纳米复合膜改性。在 NiO-ERGO 薄膜的表面功能化、结构和电化学表征后,NiO-ERGO/SPE 的 DPV 信号对 EPI 的氧化在 0.025 μM 至 175 μM 的浓度范围内表现出线性相关性,检测限为 0.015 μM,其中与之前的报道相比,NiO-ERGO 薄膜表现出良好的 EPI 检测电催化活性。NiO-ERGO 薄膜的选择性也在非常广泛的可能干扰物(抗坏血酸、尿酸、多巴胺、乳酸、苯丙氨酸、酪氨酸、+、Na +、K +、Ca 2+和 Zn 2+ )。此外,为了评估所提出的传感器对实际样品分析的适用性,成功地利用 NiO-ERGO/SPE 来测定药物样品中的 EPI。
更新日期:2021-09-01
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