Voltammetric sensor for tartrazine determination in soft drinks using poly ( p -aminobenzenesulfonic acid)/zinc oxide nanoparticles in carbon paste electrode

Abstract

Zinc oxide nanoparticles (ZnO NPs) and p-aminobenzenesulfonic acid (p-ABSA) were used to fabricate a modified electrode, as a highly sensitive and selective voltammetric sensor, for the determination of tartrazine. A fast and easy method for the fabrication of poly p-ABSA (Pp-ABSA)/ZnO NPs-carbon paste electrode (Pp-ABSA/ZnO NPs-CPE) by cyclic voltammetry was used. By combining the benefits of Pp-ABSA, ZnO NPs, and CPE, the resulted modified electrode exhibited outstanding electrocatalytic activity in terms of tartrazine oxidation by giving much higher peak currents than those obtained for the unmodified CPE and also other constructed electrodes. The effects of various experimental parameters on the voltammetric response of tartrazine were investigated. At the optimum conditions, the sensor has a linear response in the concentration range of 0349-5.44 μM, a good detection sensitivity (2.2034 μA/μM), and a detection limit of 80 nM of tartrazine. The proposed electrode was used for the determination of tartrazine in soft drinks with satisfactory results.

Voltammetric sensor for electrochemical determination of the floral origin of honey based on a zinc oxide nanoparticle modified carbon paste electrode

“…However, the method involves limitations in terms of sample preparation, time consumption and the need for expertise in pollen identification. This has led to a search for alternate methods of honey analysis using instrumental techniques (Siddiqui et al, 2017) such as atomic absorption spectroscopy (AAS) (Pohl et al, 2011), capillary electrophoresis (Jiang et al, 2015), high-pressure liquid chromatography (HPLC), thin layer chromatography (TLC) (Cavazza et al, 2013;Ares et al, 2015;Rezic et al, 2015), gas chromatography and mass spectrometry (GCMS) (Soto et al, 2015), isotope ratio mass spectrometry (IRMS) (Dinca et al, 2015), electro-spray mass spectrometry (ES-MS) (Kaskoniene et al, 2015), nuclear magnetic resonance (NMR) spectroscopy (Zheng et al, 2015), near-infrared (NIR) spectroscopy (Woodcock et al, 2007) and many more. These are separation methods, i.e.…”

“…In particular, metal oxide nanomaterials exhibit unique physical and chemical properties due to their size and high density at the corner or edge surface sites. Metal oxides are used for both their redox and acid/base properties in the context of absorption and catalysis (Karim-Nezhad et al, 2016;Afghani et al, 2016;Tavakolian et al, 2016).…”

Preparation of a Double‐step Modified Carbon Paste Electrode for Trace Quantification of Acyclovir Using TiO2 Nanoparticle and β‐Cyclodextrin

“…As can be seen from Figure 5A, the flows derived from of ACV oxidation escalate to with increasing scan speed. On the other hand, a superior linearity was observed between peak potential (E p ) and logarithm of scan rate (log n), which the totally irreversible process according to the equation following [36][37][38]: Figure 5C demonstrates the linear relationship between Ep and log v based on eq. The linear equation of ACV is I pa (mA) = 0.0745 n (mV s À1 ) + 0.7836 (R 2 = 0.9838) (Figure 5B).…”

Modified Electrodes for Determining Trace Metal Ions

“…Due to the fact that there are a great variety of metal compound nanoparticles that have been used in metal ion analysis especially recently [32], only modiied magnetic iron oxide nanoparticles (M-MIONPs) for mercury determination are mentioned here as an example.…”