Formation of graphene nanoplatelet-like structures on carbon–ceramic electrode surface: application for simultaneous determination of sunset yellow and tartrazine in some food samples

Abstract

Carbon-ceramic electrode modified with 1-allyl-3-methyl imidazolium tetraflouroborate ionic liquid was constructed. Scanning electron microscopy, X-ray diffraction analysis), energy dispersive X-ray analysis proved that the deposition of ionic liquid on the surface of carbon-ceramic electrode caused formation of graphene nanoplatelet-like structures on its surface. This electrode was used for simultaneous electrochemical determination of sunset yellow (SY) and tartrazine (Tz). Operational parameters such as pH of solution and ionic liquid volume which affected the analytical performance of modified electrode were optimized. The present electrode exhibited linear response to SY and Tz in concentration range of 1×10 −7 -1.5×10 −5 M and 1×10 −7 -2×10 −5 M with a detection limit of 7.3×10 − 8 M and 8.1×10 −8 M, respectively. The high repeatability, reproducibility, long-term life time, and low response time (<3 s) are advantages of modified electrode. The modified electrode was successfully applied for simultaneous determination of SY and Tz in different food samples, and the results were in good agreement with those obtained from HPLC method.

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

“…This is also confirmed by the slopes of the Napierian logarithmic dependence of the oxidation currents vs. the potential scan rate (Table 3), which are 0.43 and 0.45 for sunset yellow FCF and tartrazine, respectively, and close to the theoretical value of 0.5 [57]. Such behavior of dyes has been reported at other modified electrodes [58,59]. A weak-defined step on the cathodic branch of the cyclic voltammograms of sunset yellow has been observed at the high scan rates.…”

Graphene nanoplatelets like structures formed on ionic liquid modified carbon-ceramic electrode: As a sensing platform for simultaneous determination of dopamine and acetaminophen

“…The human blood serum and urine samples were obtained from Drug Applied Research Center, Tabriz University of Medical SciencesIran. 1-Allyl-3-methylimidazolium tetraflouroborate ([AMIM][BF 4 ]) as room temperature ionic liquid was synthesized according to our previous work [30].…”

“…Carbon-ceramic composite electrodes (CCEs) are comprised of a dispersion of carbon powder that is held together by sol-gel derived ceramic binder [25,26]. After the introduction of a carbon ceramic electrode on the basis of sol-gel processing, this new kind of electrode has been utilized to a great extent for electrochemical sensors [27][28][29]. However; bare carbon-ceramic electrodes have some drawbacks such as low detection sensitivity and poor resolution to specific analytes such as mixtures of DA and AP, therefore their modification is necessary.…”

Sensitive and Selective Detection of Tartrazine Based on TiO2-Electrochemically Reduced Graphene Oxide Composite-Modified Electrodes

“…Moreover, the World Health Organization (WHO) suggest that the ADI could be limited to 2.5 mg/kg. The excessive intake of tartrazine could cause various diseases, such as allergy, asthma, eczema, anxiety, migraine, and even cancer [ 3 , 4 ]. More importantly, the accidental abuse of tartrazine (such as from tainted steamed buns) has often happened in recent years.…”