The first electroanalytical method for the simultaneous determination of the colorant sunset yellow (SY) and the sweetener aspartame (AS) in commercial food samples is proposed using flow injection analysis coupled to multiple‐pulse amperometry (FIA‐MPA) and an anodically pretreated boron‐doped diamond electrode (APT‐BDDE). Dual potential waveforms are applied as a function of time: E det.1 = 1.30 V / 150 s, for the oxidation only of SY, and E det.2 = 1.70 V / 200 s, for the oxidation of both analytes. Linear analytical curves were obtained in the concentration range of 0.15–250 µmol L −1 for SY and 0.25–250 µmol L −1 for AS, with a calculated limit of detection of 0.04 µmol L −1 for both analytes. The proposed method presented a good precision and enabled the simultaneous determination of SY and AS in samples of jelly and juice powders with a good accuracy (at a 95% confidential level) when compared to an HPLC method. The proposed FIA‐MPA method is simple and fast, with an analytical frequency of 120 determinations per hour, being an attractive option for routine simultaneous determinations of SY and AS.

中文翻译：

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简单的流动注射分析系统，结合多脉冲安培法和掺硼金刚石电极，用于同时测定日落黄和阿斯巴甜

提出了使用流动注射分析，多脉冲安培法（FIA-MPA）和阳极预处理硼-的同时测定商业食品样品中的着色剂日落黄（SY）和甜味剂阿斯巴甜（AS）的第一种电分析方法。掺杂金刚石电极（APT-BDDE）。双电势波形随时间变化：E det.1 = 1.30 V / 150 s，仅用于SY的氧化，E det.2 = 1.70 V / 200 s，用于两种分析物的氧化。线性分析曲线在SY浓度范围为0.15–250 µmol L -1和AS浓度范围为0.25–250 µmol L -1下得到，两种分析物的检测极限均为0.04 µmol L -1。与HPLC方法相比，该方法具有很高的精密度，并且能够同时测定果冻和果汁粉样品中的SY和AS，准确度高（机密度为95％）。所提出的FIA-MPA方法简便，快速，每小时分析120次测定的频率，是常规同时测定SY和AS的极具吸引力的选择。