Simultaneous determination of sunset yellow and tartrazine in real samples on an n-butylamine-graphite/polyaminophenol composite electrode
Makaleler > Tam Makale · 2025
Yazarlar: Mürşide Ceren Afşar, Zekerya DURSUN
Turkish Journal of Chemistry, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2025, cilt 49, ss 103-117
Özet
A composite electrode was fabricated for simultaneous determination of sunset yellow (SY) and tartrazine (Tz) in foods andsyrup. It is based on n-butylamine intercalation into graphite and then dropped on a poly (4-aminophenol)/glassy carbon electrode(GCE). The electrode surface morphologies, chemistry, and electrical properties were identified by scanning electron microscopy(SEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy (RS), and electrochemical impedance spectroscopy (EIS). Thenew composite electrode significantly increased the electrochemical response of SY and Tz relative to a bare GCE. The peak currentof SY and Tz increased linearly depending on their concentrations from 0.006 μmol L–1 to 1.0 μmol L–1 (r = 0.994) and over two linearranges from 0.06 to 1.50 μmol L–1 (r = 0.9955) and from 2.0 to 10.0 μmol L–1 (r = 0.9902), respectively. The limits of detection of SY andTz were 2.60 nmol L–1 and 0.025 μmol L–1, respectively (S/N = 3). SY and Tz contents in real samples were determined in syrup, juicepowder, and candy. Spiked recovery for samples was from 96.4% to 106.8%. The relative standard deviations were lower than 5.0%.