An Electrochemical Sensor Based on Carbon Paper Modified with Graphite Powder for Sensitive Determination of Sunset Yellow and Tartrazine in Drinks

Abstract

The paper describes the development of an electrochemical sensor to be used for the determination of synthetic food colorants such as Sunset Yellow FCF (SY) and Tartrazine (TZ). The sensor is a carbon paper (CP) electrode, manufactured by using hot lamination technology and volume modified with fine-grained graphite powder (GrP). The sensor (GrP/CP) was characterized by scanning electron microscopy, energy dispersive spectrometry, electrochemical impedance analysis, cyclic, linear sweep and differential pulse voltammetry. The mechanism of SY and TZ electrochemical oxidation on GrP/CP was studied. The developed sensor has good electron transfer characteristics and low electron resistance, high sensitivity and selectivity. Applying the differential pulse mode, linear dynamic ranges of 0.005–1.0 μM and 0.02–7.5 μM with limits of detection of 0.78 nM and 8.2 nM for SY and TZ, respectively, were obtained. The sensor was used to detect SY and TZ in non-alcoholic and alcoholic drinks. The results obtained from drink analysis prove good reproducibility (RSD ≤ 0.072) and accuracy (recovery 96–104%).

Electropolymerized 4-Aminobenzoic Acid Based Voltammetric Sensor for the Simultaneous Determination of Food Azo Dyes

“…Therefore, various electrochemical approaches have been developed for the individual and simultaneous determination of these dyes [17][18][19]. Most of these approaches use chemically-modified electrodes based on nanomaterials [18]: carbon nanomaterials [20][21][22][23][24], metal [25,26] and metal oxide nanoparticles [27][28][29][30], as well as their composites and combinations [31][32][33][34][35], including graphene wrapped-phosphotungstic acid hybrid [36], and the combination of reduced graphene oxide with metal-organic frameworks of Ni with 1,3,5-benzene tricarboxylic acid [37]. An original approach for the simultaneous quantification of sunset yellow FCF and tartrazine has recently been developed using a paper-based electrode (conductive ink based on graphite powder and nail polish supported on cardboard) [38].…”

A modified electrode based on a 3D reduced graphene oxide and MoS2 composite for simultaneous detection of sunset yellow and tartrazine

“…A pair of redox peaks for SY indicate that the reaction of SY on 3DrGO-MoS 2 /GCE is reversible, while TZ only shows one anode peak, revealing that the reaction of TZ on 3DrGO-MoS 2 /GCE is non-reversible. 8 The peak current response of SY and TZ on the bare GCE is hardly observed, indicating the weak catalytic activity of the bare GCE for oxidation of SY and TZ while 3DrGO-MoS 2 /GCE signicantly improves the peak current response of SY and TZ, showing enhanced catalytic activity for SY and TZ oxidation. This phenomenon is more prominent in DPV measurement as shown in Fig.…”

Modifikasi permukaan elektroda karbon menggunakan CuS@rGO-Nafion dan uji kinerja elektroda pada aplikasi sensor hidrazina

“…Metode elektrokimia dengan menggunakan elektroda karbon dapat digunakan dalam mendeteksi senyawa hidrazina didalam air. Material ini tersusun atas karbon fiber yang saling berhubungan dan terikat membentuk struktur tiga dimensi dengan konduktivitas listrik yang tinggi, area permukaan spesifik, fleksibel, stabil, dan murah, sehingga membuatnya baik digunakan sebagai material sensor [8,9]. Akan tetapi, material karbon ini memiliki aktivitas elektrokimia yang rendah dan bersifat hidrofobik [10].…”