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A novel sensitive method for the simultaneous determination of ascorbic acid, dopamine, uric acid and tryptophan using a voltammetric platform based on carbon black nanoballs
Arabian Journal of Chemistry ( IF 6 ) Pub Date : 2020-01-01 , DOI: 10.1016/j.arabjc.2018.01.005
Aysegul Kutluay Baytak , Mehmet Aslanoglu

Abstract A sensitive procedure was developed for the simultaneous determination of ascorbic acid (AA), dopamine (DA), uric acid (UA) and tryptophan (TRP) using a composite electrode based on carbon black nanoballs (CBNB) and carbon nanotubes (CNTs). The CBNB/CNTs/GCE presented well-defined voltammetric peaks for AA, DA, UA and TRP. The proposed procedure has also exhibited excellent catalytic activities and achieved large enhancements of the current responses of DA, AA, UA and TRP. Simultaneous determination at CBNB/CNTs/GCE was carried out by means of square wave voltammetry (SWV). Anodic current responses changed linearly with the concentrations in the range of 2.0 × 10 −5 –4.0 × 10 −4 M for AA, 5.0 × 10 −8 –2.75 × 10 −6 M for DA, 1.0 × 10 −6 –4.5 × 10 −5 M for UA and 2.5 × 10 −8 –4.8 × 10 −6 M for TRP. Detection limits obtained at CBNB/CNTs/GCE were 5.71 × 10 −6 M for AA, 1.7 × 10 −8 M for DA, 4.2 × 10 −7 M for UA and 1.1 × 10 −8 M for TRP. The composite of CNTs and CBNB provided good reproducibility and excellent selectivity for DA, AA, UA and TRP. The proposed procedure has also applied to pharmaceuticals and food samples with satisfactory results.

中文翻译:

一种使用基于炭黑纳米球的伏安法平台同时测定抗坏血酸、多巴胺、尿酸和色氨酸的新方法

摘要 开发了一种使用基于碳黑纳米球 (CBNB) 和碳纳米管 (CNT) 的复合电极同时测定抗坏血酸 (AA)、多巴胺 (DA)、尿酸 (UA) 和色氨酸 (TRP) 的灵敏方法。 . CBNB/CNTs/GCE 为 AA、DA、UA 和 TRP 提供了明确定义的伏安峰。所提出的程序还表现出优异的催化活性,并大大增强了 DA、AA、UA 和 TRP 的当前响应。CBNB/CNTs/GCE 的同时测定是通过方波伏安法 (SWV) 进行的。阳极电流响应随浓度在 AA 的 2.0 × 10 -5 –4.0 × 10 -4 M,DA 的 5.0 × 10 -8 –2.75 × 10 -6 M,1.0 × 10 -6 –4.5 × M 的范围内线性变化UA 为 10 -5 M,TRP 为 2.5 × 10 -8 –4.8 × 10 -6 M。在 CBNB/CNTs/GCE 获得的检测限为 AA 5.71 × 10 -6 M,DA 1.7 × 10 -8 M,UA 4.2 × 10 -7 M 和 TRP 1.1 × 10 -8 M。CNTs 和 CBNB 的复合物为 DA、AA、UA 和 TRP 提供了良好的重现性和出色的选择性。建议的程序也适用于药品和食品样品,结果令人满意。
更新日期:2020-01-01
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