Simple and Rapid Determination of Tartrazine Using Poly(l-arginine)/Electrochemically Reduced Graphene Oxide Modified Glassy Carbon Electrode

Abstract

A simple and rapid electrochemical method based on a poly(L-arginine)-electrochemically reduced graphene oxide-modified glassy carbon electrode fabricated by cyclic voltammetry has been developed for the determination of tartrazine. Compared with the bare glassy carbon electrode, the modified electrode achieved a well-defined and enhanced oxidation peak due to the increased conductivity and electrochemical active surface area. The bare glassy carbon electrode and the modified electrode were characterized by scanning electron microscopy and electrochemical impedance spectroscopy. The electrocatalytic oxidation behaviors of tartrazine on the modified electrode were investigated using cyclic voltammetry and differential pulse voltammetry. The voltammetric peak current of tartrazine exhibits good linearity in the range of 1.00×10-6-2.50×10-4 mol L-1 under the optimal differential pulse voltammetry conditions, with a detection limit of 2.5×10-7 mol L-1 (at an S/N of 3). This proposed method has also been applied for quantitative analysis of tartrazine in some carbonated beverage and fruit juice samples, with satisfactory results.

Modified Electrochemical Sensors for the Detection of Selected Food Azo Dyes: A Review

“…Those sensors that are composed of carbon and polysaccharide or biopolymer composites exhibited less than a 5 % variation in percentage potential in detecting food dyes, even when concentrations of interferences were 10, 50, or 100 times greater than the analyte. [39,[73][74][75][76][77][78] These results demonstrate that ) solution containing β-CD (2 mmol L À 1 ); [72] Copyright (2020), with permission from Elsevier. d) EIS spectra of (a) bare GCE (b) poly(L-Cys)/GCE in 5.0 mmol L À 1 [Fe(CN) 6 ] 3À /4À in 0.1 mol L À 1 KCl at the frequency range 1-105 Hz, (■) experimental data and (À ) best fit of the equivalent circuit diagram.…”

“…These include FR, SC, and G, [77] as well as artificial flavors like lemon yellow, [76] preservatives, such as benzoic acid, [78] and amino acids containing non-polar hydrocarbon alkyl or aromatic chains, like L-tyrosine, L-valine, and L-Cys. [74] Additionally, salts like NaCl and KCl [39] are used as additives (refer to Table 5).…”

Electrochemical determination of vitamin B6 in pharmaceutical and energy drink samples

“…Electrochemical impedance spectroscopy (EIS) was used to further examine electrochemical characteristics of unmodified and modified electrodes. Important information about the kinetics of electron transfer at the electrodes can be provided by EIS [43]. In Nyquist plots, the semicircle diameter refers to the electron transfer resistance (Rct) at the electrode surface [44].…”

“…Among the major amino acids, phenylalanine (Figure 1B) is easily electropolymerized on the electrode surface to form poly(phenylalanine) [32]. A number of analytes have been studied electrochemically using electrodes modified with poly(phenylalanine) [33][34][35]. With respect to the intended analytes, the modified electrode demonstrated high electrocatalytic activity and stability.…”

Review—Recent Trends on the Electrochemical Sensors Used for the Determination of Tartrazine and Sunset Yellow FCF from Food and Beverage Products

“…The proposed method was successfully applied for to detection Tz in carbonated beverage and fruit juice samples and the obtained recovery values were between 98.2% and 99.6%. 31 Wang et al 32 prepared a sensitive electrochemical sensor based on glassy carbon electrode modified with multi-walled carbon nanotubes and molecularly imprinted polymer (MIP) film for the determination of tartrazine. The MIP was used in the construction of the sensor due its advantages like high selectivity, low cost and simple operation.…”