KFU. Card publication. Cerium-Dioxide-Nanoparticle-Modified Electrode for Voltammetric Determination of Propyl Gallate

KAZAN
FEDERAL UNIVERSITY

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CERIUM-DIOXIDE-NANOPARTICLE-MODIFIED ELECTRODE FOR VOLTAMMETRIC DETERMINATION OF PROPYL GALLATE

Form of presentation

Articles in international journals and collections

Year of publication

2025

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Authors, employees of KFU

Ziyatdinova Guzel Kamilevna, author

Authors, students KFU

Grigoreva Irina Olegovna, author

Bibliographic description in the original language

Ziyatdinova, G.K. Cerium-dioxide-nanoparticle-modified electrode for voltammetric determination of propyl gallate / G.K. Ziyatdinova, I.O. Grigoreva // Russ. J. Electrochem. – 2025. – V. 61. – � 10. – P. 720-731

Annotation

A novel glassy carbon electrode modified with cerium dioxide (CeO2) nanoparticles and hexadecylpyridinium bromide is developed for the voltammetric determination of propyl gallate. The hexadecylpyridinium acts as a dispersing agent that stabilized the nanomaterial and as a co-modifier of the electrode surface. Modification of the glassy carbon electrode lowered the propyl gallate oxidation peak potential by 20 mV and provided a 2.6-fold increase in the oxidation peak current. The bare and modified glassy carbon electrodes are characterized by scanning electron microscopy, cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. A statistically significant increase in the effective surface area of the modified electrode is shown (32.4 ? 0.5 mm2 as compared with 8.9 ? 0.3 mm2 for the bare glassy carbon electrode). The electrochemical impedance data indicate a 2100-fold decrease in the charge transfer resistance as compared to the bare glassy carbon electrode, which confirms the increase in the electron transfer rate (ket = 1.13 × 10–5 and 2.42 × 10–2 cm/s for glassy carbon electrode and CeO2-nanoparticles/glassy carbon electrode, respectively). Propyl gallate electrooxidation occurred irreversibly with the participation of protons and is controlled by surface processes. The parameters of electrooxidation are calculated and a scheme of the electrode reaction is suggested. The linear dynamic ranges of propyl gallate in the differential pulse voltammetry are 0.10–2.5 and 2.5–50 μM, with a detection limit of 0.022 μM. The selectivity of the electrode response to propyl gallate in the presence of inorganic ions and carbohydrates is demonstrated. Since the propyl gallate is used to prevent oxidation of vegetable oils, α-tocopherol and other antioxidant additives (tert-butylhydroxyanisole and tert-butylhydroxytoluene) used together with propyl gallate are considered as potential interfering agents. A 5-fold excess of α-tocopherol, a 10-fold excess of tert-butylhydroxyanisole and equimolar amounts of tert-butylhydroxytoluene do not interfere with the propyl gallate determination. The method is tested on extracts of sunflower and sesame oils.

Keywords

Voltammetry, modified electrodes, metal oxide nanoparticles, cerium dioxide, phenolic antioxidants, propyl gallate, food analysis

The name of the journal

RUSSIAN JOURNAL OF ELECTROCHEMISTRY

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-105025666983&doi=10.1134%2FS1023193525600828&partnerID=40&md5=db34e4c9741607f8fcc23f84b789327f

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=325039&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Ziyatdinova Guzel Kamilevna	ru_RU
dc.contributor.author	Grigoreva Irina Olegovna	ru_RU
dc.date.accessioned	2025-01-01T00:00:00Z	ru_RU
dc.date.available	2025-01-01T00:00:00Z	ru_RU
dc.date.issued	2025	ru_RU
dc.identifier.citation	Ziyatdinova, G.K. Cerium-dioxide-nanoparticle-modified electrode for voltammetric determination of propyl gallate / G.K. Ziyatdinova, I.O. Grigoreva // Russ. J. Electrochem. – 2025. – V. 61. – � 10. – P. 720-731	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=325039&p_lang=2	ru_RU
dc.description.abstract	RUSSIAN JOURNAL OF ELECTROCHEMISTRY	ru_RU
dc.description.abstract	A novel glassy carbon electrode modified with cerium dioxide (CeO2) nanoparticles and hexadecylpyridinium bromide is developed for the voltammetric determination of propyl gallate. The hexadecylpyridinium acts as a dispersing agent that stabilized the nanomaterial and as a co-modifier of the electrode surface. Modification of the glassy carbon electrode lowered the propyl gallate oxidation peak potential by 20 mV and provided a 2.6-fold increase in the oxidation peak current. The bare and modified glassy carbon electrodes are characterized by scanning electron microscopy, cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy. A statistically significant increase in the effective surface area of the modified electrode is shown (32.4 ? 0.5 mm2 as compared with 8.9 ? 0.3 mm2 for the bare glassy carbon electrode). The electrochemical impedance data indicate a 2100-fold decrease in the charge transfer resistance as compared to the bare glassy carbon electrode, which confirms the increase in the electron transfer rate (ket = 1.13 × 10–5 and 2.42 × 10–2 cm/s for glassy carbon electrode and CeO2-nanoparticles/glassy carbon electrode, respectively). Propyl gallate electrooxidation occurred irreversibly with the participation of protons and is controlled by surface processes. The parameters of electrooxidation are calculated and a scheme of the electrode reaction is suggested. The linear dynamic ranges of propyl gallate in the differential pulse voltammetry are 0.10–2.5 and 2.5–50 μM, with a detection limit of 0.022 μM. The selectivity of the electrode response to propyl gallate in the presence of inorganic ions and carbohydrates is demonstrated. Since the propyl gallate is used to prevent oxidation of vegetable oils, α-tocopherol and other antioxidant additives (tert-butylhydroxyanisole and tert-butylhydroxytoluene) used together with propyl gallate are considered as potential interfering agents. A 5-fold excess of α-tocopherol, a 10-fold excess of tert-butylhydroxyanisole and equimolar amounts of tert-butylhydroxytoluene do not interfere with the propyl gallate determination. The method is tested on extracts of sunflower and sesame oils.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Voltammetry	ru_RU
dc.subject	modified electrodes	ru_RU
dc.subject	metal oxide nanoparticles	ru_RU
dc.subject	cerium dioxide	ru_RU
dc.subject	phenolic antioxidants	ru_RU
dc.subject	propyl gallate	ru_RU
dc.subject	food analysis	ru_RU
dc.title	Cerium-Dioxide-Nanoparticle-Modified Electrode for Voltammetric Determination of Propyl Gallate	ru_RU
dc.type	Articles in international journals and collections	ru_RU