Fabrication of Conductive Polypyrrole Doped Chitosan Thin Film for Sensitive Detection of Sulfite in Real Food and Biological Samples,Electroanalysis

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Fabrication of Conductive Polypyrrole Doped Chitosan Thin Film for Sensitive Detection of Sulfite in Real Food and Biological Samples
Electroanalysis ( IF 2.7 ) Pub Date : 2020-04-10 , DOI: 10.1002/elan.201900765
Waheed A. Adeosun _{1,

2} , Abdullah M. Asiri _{1,

2} , Hadi M. Marwani _{1,

2}

Affiliation

In this study, we reported electrochemical synthesis of conductive polypyrrole‐chitosan (PPY‐CHI) thin film for sensitive detection of sulfite in real samples. The synthesized PPY‐CHI film was characterized in terms of surface morphology, optical property, binding energy, conductivity and electrochemical properties. The synthesized copolymeric PPY‐CHI film displayed good electrocatalytic behaviour towards oxidation of sulfite. The synthesized PPY‐CHI film was used for sulfite detection using differential pulse voltammetric technique with detection limit, sensitivity and linearity of 0.21 μM (S/N=3), 15.28 μA μM cm⁻² and 50–1100 μM respectively. In addition, the current responses of PPY‐CHI film towards sulfite were repeatable, reproducible response and unaffected by selected electroactive interferents. Finally, the synthesized PPY‐CHI was successfully and satisfactorily applied for determination of sulfite in real food and biological samples. The results obtained from this study highly placed PPY‐CHI film as a promising sensor for sensitive and accurate detection of sulfite in food and biological samples for human health protection.

中文翻译：

导电聚吡咯掺杂壳聚糖薄膜的制备用于灵敏检测真实食品和生物样品中的亚硫酸盐

在这项研究中，我们报道了导电聚吡咯-壳聚糖（PPY-CHI）薄膜的电化学合成，用于实际样品中亚硫酸盐的灵敏检测。合成的PPY-CHI薄膜的表面形态，光学性质，结合能，电导率和电化学性质均得到了表征。合成的共聚PPY‐CHI膜对亚硫酸盐的氧化表现出良好的电催化性能。合成的PPY‐CHI膜通过差分脉冲伏安技术用于亚硫酸盐检测，检测极限，灵敏度和线性为0.21μM（S / N = 3），15.28μAμMcm ^-2和50–1100μM。此外，PPY-CHI膜对亚硫酸盐的电流响应是可重复的，可再现的，并且不受所选电活性干扰物的影响。最终，合成的PPY-CHI成功，令人满意地用于实际食品和生物样品中亚硫酸盐的测定。这项研究获得的结果高度证明了PPY‐CHI膜是一种有希望的传感器，可以灵敏，准确地检测食品和生物样品中的亚硫酸盐，以保护人类健康。

更新日期：2020-04-10

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