Górska-Ratusznik Anna, Różańska Dominika, Smajdor Joanna, Paczosa-Bator Beata, Piech Robert
Sieć Badawcza Łukasiewicz-Krakowski Instytut Technologiczny, ul. Zakopiańska 73, 30-418 Cracow, Poland.
Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Cracow, Poland.
Molecules. 2023 Jul 18;28(14):5475. doi: 10.3390/molecules28145475.
A novel electrochemical method for the determination of quinoline yellow (QY) was developed using the renewable amalgam film electrode (Hg(Ag)FE). The sensors used can be characterized by good stability and long lifespan. Irreversible QY reduction peaks were recorded in 0.05 mol L HCl with a potential of about -630 mV. The use of the Hg(Ag)FE electrode with a regulated working surface allowed the QY limit of detection to be as low as 0.48 nmol L. The obtained result is the lowest in comparison to other voltammetric methods described in the literature. The effects of parameters such as the size of the working electrode surface, influence of the pH value, accumulation time, and potential were investigated to provide precision and high sensitivity of the performed measurements. This new procedure was applied for the highly sensitive determination of quinoline yellow in different beverages, pre-workout supplements, and throat lozenges. The process of sample preparation was relatively simple. Calculated recoveries (96-107%) suggest that the method can be considered accurate.
采用可再生汞齐膜电极（Hg(Ag)FE）开发了一种测定喹啉黄（QY）的新型电化学方法。所使用的传感器具有稳定性好、寿命长的特点。在0.05 mol L HCl中，记录到不可逆的QY还原峰，电位约为-630 mV。使用具有可调节工作表面的Hg(Ag)FE电极，使QY的检测限低至0.48 nmol L。与文献中描述的其他伏安法相比，所得结果是最低的。研究了工作电极表面尺寸、pH值影响、富集时间和电位等参数的影响，以确保所进行测量的精度和高灵敏度。该新方法用于高灵敏度测定不同饮料、运动前补充剂和润喉糖中的喹啉黄。样品制备过程相对简单。计算得到的回收率（96-107%）表明该方法可认为是准确的。
