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首页> 外文期刊>Applied Surface Science >Layer-by-Layer nanostructured films of magnetite nanoparticles and polypyrrole towards synergistic effect on methylparaben electrochemical detection
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Layer-by-Layer nanostructured films of magnetite nanoparticles and polypyrrole towards synergistic effect on methylparaben electrochemical detection

机译：磁铁矿纳米粒子和聚吡咯的层状纳米结构膜对协同作用的对羟基苯甲酸甲酯电化学检测

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摘要

The sustained use of cosmetics, hygiene products and medicines containing methylparaben (MeP) can be related to cases of cancer in women and children, which is why it is important to develop simple ways to monitor this compound. Gold electrodes were modified with Layer-by-Layer (LbL) films of magnetite nanoparticles (MNP) and polypyrrole (Ppy) for electrochemical determination of MeP. To investigate the synergistic effect between the MNP and Ppy, three different LbL architectures were tested: multilayers of Ppy with an conventional polycation poly(allylamine hydrochloride) - Au/(PAH/Ppy)(3), MNP with a conventional polyanion poly(vinyl sulfonic acid)- Au/(MNP/PVS)(3) and the hybrid composite film Au/(MNP/Ppy)(3). The highest oxidation current and lowest oxidation potential were achieved by the Au/(MNP/Ppy)(3) electrode in a range up to 131.4 mu mol L-1 with a limit of detection of 9.95 x 10(-8) mol L-1. The performance of the electrochemical sensor was statistically investigated by the Miller-Miller method demonstrating accuracy comparable to an analytical method (capillary electrophoresis). MeP was determined in urine, breast milk and cosmetic with recovery values varying from 84.0% to 113.3%.
机译：持续使用含有对羟基苯甲酸甲酯（MeP）的化妆品，卫生用品和药物可能与妇女和儿童患癌症的情况有关，这就是为什么开发简单的方法来监测该化合物的重要性。金电极用磁铁矿纳米颗粒（MNP）和聚吡咯（Ppy）的逐层（LbL）膜修饰，用于电化学测定MeP。为了研究MNP和Ppy之间的协同效应，测试了三种不同的LbL结构：具有常规聚阳离子聚（烯丙胺盐酸盐）-Au /（PAH / Ppy）（3）的Ppy多层，具有常规聚阴离子聚（乙烯基）的MNP磺酸）-Au /（MNP / PVS）（3）和混合复合膜Au /（MNP / Ppy）（3）。 Au /（MNP / Ppy）（3）电极可在131.4μmol L-1的范围内实现最高氧化电流和最低氧化电位，检测极限为9.95 x 10（-8）mol L- 1。电化学传感器的性能通过Miller-Miller方法进行统计研究，证明其精度可与分析方法（毛细管电泳）相比。测定尿液，母乳和化妆品中的MeP，回收率从84.0％到113.3％不等。

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