Sensitive voltammetric sensor based on isopropanol-Nafion-PSS-GR nanocomposite modified glassy carbon electrode for determination of clenbuterol in pork.
Sensitive voltammetric sensor based on isopropanol-Nafion-PSS-GR nanocomposite modified glassy carbon electrode for determination of clenbuterol in pork.
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DOI：
10.1016/j.foodchem.2014.04.052
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发表时间：
2014-12
期刊：
影响因子：
8.8
通讯作者：
Ling Wang;Ran Yang;J. Chen;Jian-jun Li;Ling‐bo Qu;Peter de B. Harrington
中科院分区：
文献类型：
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作者：
Ling Wang;Ran Yang;J. Chen;Jian-jun Li;Ling‐bo Qu;Peter de B. Harrington
在本研究中，聚（4-苯乙烯磺酸钠）（PSS）功能化石墨烯（GR）是通过在 PSS 存在下对剥离石墨氧化物进行简单的一步化学还原来合成的。使用傅里叶变换红外光谱 (FT-IR) 以及紫外和可见光谱 (UV-vis) 对制成的纳米复合材料进行表征，清楚地证明了 PSS 与石墨烯片的成功附着。基于异丙醇-Nafion-PSS-GR复合膜修饰玻碳电极制备了一种新型克仑特罗（CLB）电化学传感器。在 Britton-Robinson 缓冲液（pH 1.2）中，传感器对 CLB 的氧化表现出优异的电催化活性。采用线性扫描伏安法，氧化峰电流与CLB浓度在7.5×10−8–2.5×10−5mol L−1范围内呈良好的线性关系，检测限为2.2×10−8mol L−1。该方法成功应用于猪肉中CLB的测定。
In the present study, poly(sodium 4-styrenesulfonate) (PSS) functionalized graphene (GR) was synthesised via a simple one-step chemical reduction of exfoliated graphite oxides in the presence of PSS. Characterisation of as-made nanocomposite using Fourier transform infrared spectroscopy (FT-IR) and ultraviolet and visible spectroscopy (UV–vis) clearly demonstrate the successful attachment of PSS to graphene sheets. A novel clenbuterol (CLB) electrochemical sensor was fabricated based on isopropanol–Nafion–PSS–GR composite film modified glassy carbon electrode. In the Britton–Robinson buffer (pH 1.2), the sensor exhibited superior electrocatalytic activity towards the oxidation of CLB. Applying linear sweep voltammetry, a good linear relationship of the oxidation peak current with respect to concentrations of CLB cross the range of 7.5 × 10−8–2.5 × 10−5mol L−1and a detection limit of 2.2 × 10−8mol L−1were achieved. The proposed method was successfully applied for the determination of CLB in pork.