Highly Sensitive Amperometric Sensor for Eugenol Quantification Based on CeO₂ Nanoparticles and Surfactants

Abstract

Amperometric sensor for eugenol based on glassy carbon electrode (GCE) modified with CeO2 nanoparticles dispersed in surfactant was fabricated. The effect of surfactant nature (sodium dodecylsulfate, cetylpyridinium bromide (CPB) and Brij® 35) on eugenol voltammetric behaviour was tested. In comparison to CeO2‐H2O/GCE, CeO2‐CPB/GCE showed 2.8‐fold increased current and 70 mV cathodic shift of potential in the diffusion‐controlled irreversible electrooxidation. The electrodes were characterized with SEM and EIS. CeO2‐CPB/GCE showed significantly lower charge transfer resistance (2.6±0.3 kΩ vs. 20±1 kΩ for CeO2‐H2O/GCE and 173±9 kΩ for GCE). Under conditions of DPV, the sensor linear dynamic range is 0.075‐75.0 μM of eugenol with the limits of detection (LOD) and quantification (LOQ) of 19.1 and 63.8 nM, respectively. The sensor exhibited high sensitivity, selectivity, good reproducibility and fast response and was applied for the real samples analysis (essential oils and clove spices). The results obtained correspond well to the data of spectrophotometric method.

Voltammetric Determination of Hesperidin on the Electrode Modified with SnO2 Nanoparticles and Surfactants

“…As known [30,31,[35][36][37], application of surfactants as metal oxide nanoparticles dispersive agent provides significant increase of target analytes oxidation currents. Moreover, the nature and concentration of surfactant in dispersion play a key role in the response of target analyte depending on its type.…”

Recent advances in applications of surfactant‐based voltammetric sensors

“…GCE modified with CeO 2 nanoparticles was dispersed in CPB, which had been prepared to quantify eugenol. Some of the prominent advantages of the sensor were high sensitivity, selectivity, reproducibility, and fast response, which rendered it suitable for the analysis of real samples (Ziyatdinova, Ziganshina, Romashkina, & Budnikov, 2017). Furthermore, a new sensor was developed to assess p‐coumaric acid; after the surface coating of GCE with rhodium nanoparticles, it was stabilized in a zwitterionic surfactant known as 3‐(1‐tetradecyl‐3‐imidazolium) propanesulfonate (ImS3‐14).…”

Voltammetric Determination of Anethole on La2O3/CPE and BDDE

“…Moreover, their applicative properties can be improved by doping with metal oxide modifiers. The usage of different doping oxides was reported for modification of carbon-based electrodes so far [ 18 – 22 ]. According to the literature, addition of controlled amounts of cerium(IV) oxide to glassy carbon electrodes material led to the significant enhancement of sensitivity, selectivity, reproducibility, and response time in the amperometric quantification of eugenol [ 22 ].…”