Simple Flow Injection Analysis System Coupled to Multiple‐Pulse Amperometry and a Boron‐Doped Diamond Electrode for the Simultaneous Determination of Sunset Yellow and Aspartame. Issue 8 (24th April 2020)

• Record Type: Journal Article
• Authors: Deroco, Patrícia B.; Medeiros, Roberta A.; Rocha‐Filho, Romeu C.; Fatibello‐Filho, Orlando
• Is Part Of: ChemElectroChem. Volume 7:Issue 8(2020)
• Page Start: 1943
• Page End: 1950
• Publication Date: 2020-04-24
• Subjects: analytical methods -- anodic pretreatment -- boron-doped diamond electrodes -- flow injection analysis -- multiple-pulse amperometry.; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.202000365
• Languages: English
• ISSNs: 2196-0216

Abstract

Abstract: 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 0.15–25.0 μmol L −1 for SY and 0.25–25.0 μmol L −1 for AS, with a calculated limit of detection of 0.04 μmol L −1 for both analytes. The proposed method presented 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. Abstract : Fruitful combination : For the first time, the colorant sunset yellow (SY) and the sweetener aspartame (AS) are simultaneously determined in commercial food samples using an electroanalytical method. This is made possible by combining an anodically pretreated boron‐doped diamond electrode and multiple‐pulse amperometry with flow injection analysis. The novel method, which is simple and fast, enables the accurate simultaneous determination of SY and AS in samples of jelly and juice powders that is comparative to an HPLC method.