Gimadutdinova Liliya, Ziyatdinova Guzel, Davletshin Rustam
Analytical Chemistry Department, Kazan Federal University, Kremleyevskaya 18, Kazan 420008, Russia.
Department of High Molecular and Organoelement Compounds, Kazan Federal University, Kremleyevskaya 18, Kazan 420008, Russia.
Sensors (Basel). 2024 Jan 31;24(3):930. doi: 10.3390/s24030930.
Sunset Yellow FCF (SY FCF) is one of the widely used synthetic azo dyes in the food industry whose content has to be controlled for safety reasons. Electrochemical sensors are a promising tool for this type of task. A voltammetric sensor based on a combination of tin and cerium dioxide nanoparticles (SnO-CeO NPs) with surfactants has been developed for SY FCF determination. The synergetic effect of both types of NPs has been confirmed. Surfactants of various natures (sodium lauryl sulfate (SLS), Brij 35, and hexadecylpyridinium bromide (HDPB)) have been tested as dispersive media. The best effects, i.e., the highest oxidation currents of SY FCF, have been observed in the case of HDPB. The sensor demonstrates a 4.5-fold-higher electroactive surface area and a 38-fold-higher electron transfer rate compared to the bare glassy carbon electrode (GCE). The electrooxidation of SY FCF is an irreversible, two-electron, diffusion-driven process involving proton transfer. In differential pulse mode in Britton-Robinson buffer (BRB) pH 2.0, the sensor gives a linear response to SY FCF from 0.010 to 1.0 μM and from 1.0 to 100 μM with an 8.0 nM detection limit. The absence of an interferent effect from other typical food components and colorants has been shown. The sensor has been tested on soft drinks and validated with the standard chromatographic method.
日落黄FCF（SY FCF）是食品工业中广泛使用的合成偶氮染料之一，出于安全考虑，其含量必须受到控制。电化学传感器是完成这类任务的一种很有前景的工具。已开发出一种基于二氧化锡和二氧化铈纳米颗粒（SnO-CeO NPs）与表面活性剂相结合的伏安传感器用于测定SY FCF。已证实了这两种纳米颗粒的协同效应。已测试了各种性质的表面活性剂（十二烷基硫酸钠（SLS）、Brij 35和十六烷基溴化吡啶（HDPB））作为分散介质。在HDPB的情况下观察到了最佳效果，即SY FCF的氧化电流最高。与裸玻碳电极（GCE）相比，该传感器的电活性表面积高4.5倍，电子转移速率高38倍。SY FCF的电氧化是一个不可逆的、双电子、扩散驱动的过程，涉及质子转移。在Britton-Robinson缓冲液（BRB）pH 2.0的差分脉冲模式下，该传感器对SY FCF在0.010至1.0 μM以及1.0至100 μM范围内呈现线性响应，检测限为8.0 nM。已表明不存在来自其他典型食品成分和着色剂的干扰效应。该传感器已在软饮料上进行了测试，并通过标准色谱法进行了验证。
