Li Lin, Liu Lanlan, Zhou Jianmei, Gu Chen, Wu Xiongzhi, Lei Chenghong, Yan Liqiang
College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, China.
College of Physics and Electronic Information Engineering, Guilin University of Technology, Guilin, 541004, China.
Mikrochim Acta. 2025 Mar 18;192(4):238. doi: 10.1007/s00604-025-07092-2.
A simple and rapid electrochemical method based on a composite of cadmium telluride quantum dots (CdTe QDs) and MXene is developed for the simultaneous determination of rutin and quercetin in food samples. The CdTe QD-MXene composite is synthesized via the in situ growth of CdTe QDs on MXene, which serves as a carrier and enhances electrical conductivity. Incorporating CdTe QDs into MXene interlayers effectively prevents agglomeration in MXene and provides more active sites for electrochemical determination. The developed electrochemical method can successfully determine rutin and quercetin, both individually and simultaneously, in aqueous solutions while achieving high stability and selectivity. Notably, the prepared sensor exhibits limits of detection of 3.300 × 10 and 3.268 × 10 M for the simultaneous determination of rutin and quercetin, respectively. Moreover, the sensing platform is used for the determination of rutin in buckwheat, locust rice, and apples, with results well comparable to those obtained using ultraviolet spectroscopy. Finally, the proposed sensor is employed to monitor the hydrolysis of rutin into quercetin in buckwheat using an electrochemical method for the first time. This study provides new ideas for the application of electrochemical sensors in food and drug science.
开发了一种基于碲化镉量子点（CdTe QDs）与MXene复合材料的简单快速电化学方法，用于同时测定食品样品中的芦丁和槲皮素。CdTe QD-MXene复合材料是通过在MXene上原位生长CdTe QDs合成的，MXene作为载体并提高电导率。将CdTe QDs掺入MXene中间层可有效防止MXene团聚，并为电化学测定提供更多活性位点。所开发的电化学方法能够在水溶液中成功地单独或同时测定芦丁和槲皮素，同时具有高稳定性和选择性。值得注意的是，所制备的传感器对芦丁和槲皮素同时测定的检测限分别为3.300×10和3.268×10 M。此外，该传感平台用于测定荞麦、槐米和苹果中的芦丁，结果与紫外光谱法相当。最后，首次采用所提出的传感器通过电化学方法监测荞麦中芦丁水解为槲皮素的过程。本研究为电化学传感器在食品和药物科学中的应用提供了新思路。
