Abstract In this study a modified electrode based on hollow fiber-pencil graphite electrode (HF-PGE) was introduced for extraction and in-situ determination of low concentrations of bisphenol A (BPA) as a typical endocrine disruptor (ED) and cancer promoter using differential pulse voltammetry (DPV). Nickel carbide nanoparticle (Ni3C) and multi-walled carbon nanotube (MWCNTs) were used for HF modification. The fundamental factors affecting the extraction of analyte, including pH of aqueous phase, extraction time, and stirring speed were investigated. The relationship between the DPV signal and concentration was linear in the ranges of 0.6 nM to 0.01 μM and 0.01 to 4 μM (R2 = 0.9958, 0.9972) with limit of detection 0.13 nM. The applicability of the developed technique was tested by determination of BPA in real samples such as plastic drinking bottle and food package samples.

中文翻译：

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一种用于双酚A原位超痕量分析的新型高灵敏度MWCNTs-碳化镍/中空纤维-铅笔石墨修饰电极

摘要 在本研究中，引入了一种基于中空纤维铅笔石墨电极 (HF-PGE) 的修饰电极，用于提取和原位测定作为典型内分泌干扰物 (ED) 和致癌促进剂的低浓度双酚 A (BPA)。差分脉冲伏安法 (DPV)。碳化镍纳米颗粒 (Ni3C) 和多壁碳纳米管 (MWCNT) 用于 HF 改性。考察了影响分析物提取的基本因素，包括水相的pH值、提取时间和搅拌速度。DPV 信号与浓度之间的关系在 0.6 nM 至 0.01 μM 和 0.01 至 4 μM 范围内呈线性关系（R2 = 0.9958, 0.9972），检测限为 0.13 nM。