Nanocomposites of gold nanoparticles (AuNPs) and conducting polymers, polypyrrole (PPy) and polyaniline (PANI), were prepared by simple oxidative polymerization of the corresponding monomer (pyrrole and aniline, respectively) by tetrachloroauric acid. Au nanospheres and nanorods were formed in the case of Au@PPy and Au@PANI, respectively. Detection of As(III) using Au@polymer was investigated where both nanocomposites showed similar activity for As electrooxidation in acidic media. The activity of Au@PPy was notably improved upon the addition of a small amount of conducting carbon, giving higher current densities compared to the commercial Au electrode. Further optimization of the operational conditions including electrolyte composition, deposition time and potential, was carried out to reach the limit of quantification as low as 2 ppb. Au@PPy nanocomposite proved to be suitable for sensing of As(III) in the presence of other ions, such as Cu(II). Furthermore, it proved to be suitable for As(III) sensing in real samples.

金纳米粒子 (AuNPs) 和导电聚合物聚吡咯 (PPy) 和聚苯胺 (PANI) 的纳米复合材料是通过四氯金酸对相应单体（分别为吡咯和苯胺）的简单氧化聚合制备的。在 Au@PPy 和 Au@PANI 的情况下，分别形成了 Au 纳米球和纳米棒。研究了使用 Au@聚合物检测 As(III)，其中两种纳米复合材料在酸性介质中对 As 电氧化表现出相似的活性。添加少量导电碳后，Au@PPy 的活性显着提高，与商业 Au 电极相比，电流密度更高。进一步优化了操作条件，包括电解质组成、沉积时间和电位，以达到低至 2 ppb 的量化限制。Au@PPy 纳米复合材料被证明适用于在其他离子（如 Cu（II））存在下检测 As（III）。此外，它被证明适用于实际样品中的 As(III) 感测。