A sensitive device was developed for the electroanalytical determination of bisphenol A (BPA) through modification of a carbon paste electrode (CPE) with orthorhombic molybdenum trioxide (α-MoO3). The α-MoO3 orthorhombic structure was confirmed by X-ray diffractometry and the plate-like morphology in micrometric dimensions by scanning electron microscopy. The α-MoO3/CPE showed a better charge transfer between electrode-solution interface and a higher current intensity for the oxidation of BPA when compared to the CPE. The calibration plot of BPA by square wave voltammetry was linear in the range of 0.03 to 1.6 μmol L−1 with limits of detection and quantification of 0.015 and 0.051 μmol L−1, respectively. Lastly, the α-MoO3/CPE was effectively applied to monitoring BPA leaching from commercial plastic samples to water. The results were compared with those provided by UV–vis spectrometry.

中文翻译：

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将三氧化钼掺入碳膏中，作为双酚 A 监测的灵敏装置


开发了一种灵敏的装置，用于通过用正交三氧化钼 （α-MoO3） 修饰碳膏电极 （CPE） 来电分析测定双酚 A （BPA）。X 射线衍射法证实了 α-MoO3 正交结构，扫描电子显微镜证实了微米维度的板状形貌。与 CPE 相比，α-MoO3/CPE 在电极溶液界面之间显示出更好的电荷转移和更高的 BPA 氧化电流强度。方波伏安法对 BPA 的校准图在 0.03 至 1.6 μmol L-1 范围内呈线性，检测限和定量限分别为 0.015 和 0.051 μmol L-1。最后，α-MoO3/CPE 有效地应用于监测 BPA 从商业塑料样品浸出到水中的情况。将结果与紫外-可见光谱法提供的结果进行了比较。