A Facile Method Used for Simultaneous Determination of Ponceau 4R, Allura Red and Tartrazine in Alcoholic Beverages

作者：Wang, Meiling^*; Zhao, Jianwei

来源：Journal of the Electrochemical Society, 2015, 162(6): H321-H327.

DOI：10.1149/2.0111506jes

• SYNTHETIC FOOD COLORANTS
• LIQUID-CHROMATOGRAPHY
• SOFT DRINKS
• VOLTAMMETRIC DETERMINATION
• DIHYDROXYBENZENE ISOMERS
• PHASE
• DYES
• EXTRACTION
• PIGMENTS

A facile electrochemical sensor was fabricated via highly dispersing Multi-walled carbon nanotubes (MWCNTs) in ionic liquid-graphene oxides (IL-GO) "water" at room temperature. The introduction of IL (1-butyl-3-methylimidazolium hexafluorophosphate) to GO water resulted in the high dispersibility of MWCNTs and also caused fast electron transfer rates of the three dyes of Ponceau 4R (E124), Tartrazine (E102) and Allura red (E129) at the IL-GO-MWCNT composites modified glassy carbon electrode (IL-GO-MWCNT/GCE). Well-separated oxidation peaks and enhanced peak currents of Ponceau 4R, Allura red, and Tartrazine were observed at the IL-GO-MWCNT modified GCE. For individual detection, the linear responses of Ponceau 4R, Allura red, and Tartrazine were in the concentration ranges of 1.0 x 10(-9)-1.0 x 10(-6), 8.0 x 10(-10)-5.0 x 10(-7), and 1.0 x 10(-8)-1.0 x 10(-6) mol L-1 with detection limits of 8.0 x 10(-10), 5.0 x 10(-10), and 7.0 x 10(-9) mol L-1 (S/N = 3), respectively. For simultaneous determination by synchronous change of the concentrations of Ponceau 4R, Allura red, and Tartrazine, the linear response ranges were 8.0 x 10(-9)-1.5 x 10(-7), 5.0 x 10(-9)-4.5 x 10(-7) and 2.0 x 10(-8)-1.3 x 10(-2) mol L-1 with the detection limits of 6.0 x 10(-9), 3.0 x 10(-9), and 1.0 x 10(-8) mol L-1 (S/N = 3), respectively. The fabricated sensors were further applied for the detection of Ponceau 4R, Allura, red and Tartrazine in alcoholic beverages.

• 出版日期2015
• 单位南京大学; 生命分析化学国家重点实验室