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MWCNT/Nileblue Heterostructured Composite Electrode for Flavanone Naringenin Quantification in Fruit Juices
Electroanalysis ( IF 2.7 ) Pub Date : 2019-12-19 , DOI: 10.1002/elan.201900573 G. Manasa 1 , Ronald J Mascarenhas 1 , Arvind K Bhakta 2 , Zineb Mekhalif 2
Electroanalysis ( IF 2.7 ) Pub Date : 2019-12-19 , DOI: 10.1002/elan.201900573 G. Manasa 1 , Ronald J Mascarenhas 1 , Arvind K Bhakta 2 , Zineb Mekhalif 2
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Naringenin (NR) displays strong antioxidant and numerous pharmacological activities, mitigating severity of metabolic‐syndromes without undesirable side‐effects. With the upsurge of interest in administering NR as diet‐supplement antioxidant, in this work for the first time we implemented functionalized‐MWCNT/Nileblue‐composite on carbon paste electrode (fMWNCT/NB/MCPE), as electrochemical sensor for catalytic NR oxidation. Integrated properties of fMWCNT/NB and their consonance with CPE, led to lowering of Rct value with fast‐kinetics and diminution of over‐potential. NR determination was due to electrical‐conductivity, π‐π and electrostatic‐forces that magnified anodic current by 5.5 fold. In the pH range 3.0 to 10.0 NR undergoes irreversible oxidation via transfer of 1e−/H+. Critical parameters, namely, pH and scan rate were assessed to reinforce differential pulse voltammtery (DPV) sensitivity for quantitative measurements. Sensor's selectivity, stability, accuracy and reproducibility were determined. Finally its viability in quantifying NR was validated by scrutinizing NR fortified fruit juices, as real sample matrices.
中文翻译：
MWCNT / Nileblue异质结构复合电极用于果汁中黄酮酮柚皮素的定量
柚皮素（NR）具有很强的抗氧化剂和多种药理活性，可减轻代谢综合征的严重程度，而无不良副作用。随着人们越来越热衷于将NR作为膳食补充抗氧化剂来管理，在这项工作中，我们首次在碳糊电极（fMWNCT / NB / MCPE）上实现了功能化MWCNT / Nileblue复合材料，作为催化NR氧化的电化学传感器。fMWCNT / NB的综合特性及其与CPE的共鸣，导致R ct值的降低，同时具有快速动力学和超电势的减小。NR的确定是由于电导率，π-π和静电力将阳极电流放大了5.5倍。在pH范围3.0至10.0 NR经由1e的转移经历不可逆的氧化- / H+。评估了关键参数，即pH和扫描速率，以增强差分脉冲伏安法（DPV）的灵敏度，以进行定量测量。确定了传感器的选择性，稳定性，准确性和可重复性。最后，通过仔细检查作为天然样品基质的NR强化果汁，验证了其在定量NR中的可行性。
更新日期：2019-12-19
中文翻译：
MWCNT / Nileblue异质结构复合电极用于果汁中黄酮酮柚皮素的定量
柚皮素（NR）具有很强的抗氧化剂和多种药理活性，可减轻代谢综合征的严重程度，而无不良副作用。随着人们越来越热衷于将NR作为膳食补充抗氧化剂来管理，在这项工作中，我们首次在碳糊电极（fMWNCT / NB / MCPE）上实现了功能化MWCNT / Nileblue复合材料，作为催化NR氧化的电化学传感器。fMWCNT / NB的综合特性及其与CPE的共鸣，导致R ct值的降低，同时具有快速动力学和超电势的减小。NR的确定是由于电导率，π-π和静电力将阳极电流放大了5.5倍。在pH范围3.0至10.0 NR经由1e的转移经历不可逆的氧化- / H+。评估了关键参数，即pH和扫描速率，以增强差分脉冲伏安法（DPV）的灵敏度，以进行定量测量。确定了传感器的选择性，稳定性，准确性和可重复性。最后，通过仔细检查作为天然样品基质的NR强化果汁，验证了其在定量NR中的可行性。
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