Abstract According to the recently rumors about abusing of sodium dithionite (SDT) in baking bread by some bakers, we motivated to plan a study to fabricate an electrochemical SDT sensor. This work reports our results on fabricating a novel and high performance electrochemical sensor based on AuPd nanoparticles (AuPd NPs)/chitin-ionic liquid (Ch-IL)/ferrocene dicarboxylic acid‑carbon black-ionic liquid (FDCA-CB-IL)/glassy carbon electrode (GCE) to ultrasensitive determination of SDT in bread samples. The modifications steps were characterized with the help of cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy. After characterization of the modifications, the sensor was electroanalytically characterized by chronoamperometry and the sensor was able to detect SDT in two linear ranges of 0.001–6 and 6–200 μM with a limit of detection of 0.1 nM and a sensitivity of 21.76 μA μM −1 . After confirming the capability of the sensor for SDT determination in synthetic samples, it was applied to determination of SDT in three Iranian traditional bread samples and fortunately, there wasn't any SDT in the tested bread samples and to further investigation of the ability of the sensor, the real samples were spiked and good recoveries obtained which guaranteed a good performance for the fabricated sensor.

中文翻译：

---

一种致力于制造新型高性能安培连二亚硫酸钠传感器的有趣策略

摘要 根据最近一些面包师在烤面包中滥用连二亚硫酸钠 (SDT) 的传闻，我们有动力计划一项研究来制造电化学 SDT 传感器。这项工作报告了我们基于 AuPd 纳米粒子（AuPd NPs）/几丁质离子液体（Ch-IL）/二茂铁二羧酸-炭黑-离子液体（FDCA-CB-IL）/玻碳电极 (GCE) 超灵敏测定面包样品中的 SDT。借助循环伏安法、电化学阻抗谱和扫描电子显微镜对改性步骤进行了表征。在对修改进行表征后，传感器通过计时电流法进行电分析表征，并且传感器能够在两个线性范围 0 内检测 SDT。001–6 和 6–200 μM，检测限为 0.1 nM，灵敏度为 21.76 μA μM -1 。在确认了传感器对合成样品中 SDT 测定的能力后，将其应用于三个伊朗传统面包样品中 SDT 的测定，幸运的是，被测面包样品中没有任何 SDT，并进一步研究了该传感器的测定能力。传感器，实际样品被加标并获得了良好的回收率，这保证了制造的传感器的良好性能。