Electro-Oxidation and Simultaneous Determination of Indole-3-Acetic Acid and Salicylic Acid on Graphene Hydrogel Modified Electrode
Electro-Oxidation and Simultaneous Determination of Indole-3-Acetic Acid and Salicylic Acid on Graphene Hydrogel Modified Electrode
复制标题
石墨烯水凝胶修饰电极电氧化同时测定3-吲哚乙酸和水杨酸
DOI：
10.3390/s19245483
复制
发表时间：
2019-12-02
期刊：
影响因子：
3.9
通讯作者：
Ye, Yongkang
中科院分区：
文献类型：
--
作者：
Cao, Xiaodong;Zhu, Xueting;Ye, Yongkang
研制了一种同时检测植物激素吲哚乙酸（IAA）和水杨酸（SA）的电化学传感器。传感界面制备在多孔、三维网状石墨烯水凝胶（GH）修饰的玻碳电极（GCE）上。采用循环伏安法和线性扫描伏安法研究了吲哚乙酸和水杨酸在修饰电极（GH/GCE）表面的电催化行为。结果表明，IAA和SA的氧化反应发生在不同的电位，这使得他们在传感界面的同时检测。在最佳条件下，GH/GCE具有良好的选择性和稳定性，其响应不受各种干扰物的影响，在4至200 μ M的IAA和SA范围内呈线性。达到的检测限（S/N = 3）为：IAA为1.42 μ M，SA为2.80 μ M。通过对真实的蔬菜样品中IAA和SA的检测，验证了传感器的性能，获得了满意的结果。
A selective and sensitive electrochemical sensor was developed for simultaneous detection of phytohormones indole-3-acetic acid (IAA) and salicylic acid (SA). The sensing interface was fabricated on a porous, three-dimensional networked graphene hydrogel (GH) modified glassy carbon electrode (GCE). The electrocatalytic behavior of IAA and SA on the surface of the modified electrode (GH/GCE) was investigated by cyclic voltammetry and linear sweep voltammetry. Results show that the oxidation reactions of IAA and SA occur at different potentials, which enable their simultaneous detection at the sensing interface. Under optimal conditions, the GH/GCE exhibited good selectivity and stability and its response, unaffected by various interferents, was linear in the range of 4 to 200 mu M of IAA and SA. The limit of detection (S/N = 3) achieved were 1.42 mu M for IAA and 2.80 mu M for SA. The sensor performance was validated by measuring for IAA and SA in real vegetable samples with satisfactory results.