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Highly Sensitive Amperometric Sensor for Eugenol Quantification Based on CeO 2 Nanoparticles and Surfactants
Author(s) -
Ziyatdinova Guzel,
Ziganshina Endzhe,
Romashkina Svetlana,
Budnikov Herman
Publication year - 2017
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201600719
Subject(s) - amperometry , eugenol , chemistry , detection limit , electrochemical gas sensor , pulmonary surfactant , reproducibility , bromide , electrode , nuclear chemistry , cyclic voltammetry , chromatography , electrochemistry , analytical chemistry (journal) , inorganic chemistry , organic chemistry , biochemistry
Abstract Amperometric sensor for eugenol based on glassy carbon electrode (GCE) modified with CeO 2 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 CeO 2 ‐H 2 O/GCE, CeO 2 ‐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. CeO 2 ‐CPB/GCE showed significantly lower charge transfer resistance (2.6±0.3 kΩ vs. 20±1 kΩ for CeO 2 ‐H 2 O/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.