基于导电 PTH-DPP 薄膜对阴极电化学发光的敏化作用测定食品中亚硝酸盐。
Determination of nitrite in food based on its sensitizing effect on cathodic electrochemiluminescence of conductive PTH-DPP films.
机构信息
School of Food Science and Engineering, State Key Laboratory of Biobased Material and Green Papermaking, School of Materials Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
School of Food Science and Engineering, State Key Laboratory of Biobased Material and Green Papermaking, School of Materials Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
出版信息
Food Chem. 2022 Dec 15;397:133760. doi: 10.1016/j.foodchem.2022.133760. Epub 2022 Jul 22.
Herein, a novel strategy for electrochemiluminescence (ECL) detection of nitrite based on its sensitization effect on cathode ECL emission of 3,6-di(2-thienyl)-2,5-dihydropyrrolo [3,4-c] pyrrole-1,4-dione (TH-DPP) polymeric films (PTH-DPP) was formulated, by means of a one-step electropolymerization of TH-DPP with a short time on the glassy carbon electrode (GCE). It was shown that the PTH-DPP film-modified GCE exhibited a strong ECL response when SO was used as a co-reactant. The ECL emission could be greatly enhanced by PTH-DPP with nitrite in a KSO/PBS solution system and occurred at a relatively lower potential in comparison with traditional cathode ECL emitter, leading to high sensitivity and good selectivity. The ECL sensor exhibits excellent linear relationship in the ranges of 0.3 to 100 μM and 100 to 1000 μM for nitrite detection, with an outstanding detection limit of 0.08 μM (S/N = 3). The ECL sensor provides an impressive outcome for the detection of practical samples.
本文提出了一种基于 3,6-二（2-噻吩基）-2,5-二氢吡咯并[3,4-c]吡咯-1,4-二酮（TH-DPP）聚合物薄膜（PTH-DPP）阴极电致化学发光（ECL）发射敏化效应的亚硝酸根电化学发光（ECL）检测新策略，该策略通过在玻碳电极（GCE）上进行一步 TH-DPP 电聚合实现，时间很短。结果表明，当 SO 用作共反应物时，PTH-DPP 修饰的 GCE 表现出很强的 ECL 响应。在 KSO/PBS 溶液体系中，PTH-DPP 可大大增强亚硝酸根的 ECL 发射，与传统的阴极 ECL 发射器相比，其在较低的电位下发生 ECL 发射，从而具有高灵敏度和良好的选择性。该 ECL 传感器在 0.3 至 100 μM 和 100 至 1000 μM 范围内对亚硝酸根的检测具有优异的线性关系，检测限低至 0.08 μM（S/N = 3）。该 ECL 传感器为实际样品的检测提供了令人印象深刻的结果。
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