KFU. Card publication. Sensitive Voltammetric Sensor for Thymol and Carvacrol Based on the Electropolymerized Thymolphtalein

KAZAN
FEDERAL UNIVERSITY

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SENSITIVE VOLTAMMETRIC SENSOR FOR THYMOL AND CARVACROL BASED ON THE ELECTROPOLYMERIZED THYMOLPHTALEIN

Form of presentation

Articles in international journals and collections

Year of publication

2023

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Authors, employees of KFU

Ziyatdinova Guzel Kamilevna, author

Authors, students KFU

Chernousova Natalya Anatolevna, author

Bibliographic description in the original language

Ziyatdinova, G. Sensitive voltammetric sensor for thymol and carvacrol based on the electropolymerized thymolphtalein / G. Ziyatdinova, N. Chernousova // Eng. Proc. – 2023. – V. 31. – � 1. – Article 5. – 7 p.

Annotation

Thymol and carvacrol (isopropylmethylphenols) are natural phenolic monoterpenoids with antibacterial, antifungal, insecticidal, and antioxidant properties. Their dose-dependent antioxidant effect requires control in real samples. Various modes of voltammetry have been successfully developed for thymol and carvacrol quantification. A glassy carbon electrode (GCE) modified with multi-walled carbon nanotubes (MWCNTs) and electropolymerized thymolphthalein has been developed for this purpose. The conditions of thymolphthalein electropolymerization (monomer concentration, number of cycles, and parameters of electrolysis) providing the best response to thymol have been found. The scanning electron microscopy and electrochemical methods confirm the effectivity of the sensor developed. In differential pulse mode, the sensor gives a linear response in the ranges of 0.050–25 and 25–100 μM for thymol and 0.10–10 and 10–100 μM for carvacrol, with detection limits of 0.037 and 0.063 μM, respectively, that are significantly improved compared to those reported earlier. The sensor developed is selective to isopropylmethylphenols in the presence of typical interferences (inorganic ions, saccharides, and ascorbic acid) and other phenolics (caffeic, chlorogenic, gallic and rosmarinic acids, quercetin, and rutin). A sensor has been applied for the evaluation of total isopropylmethylphenols in oregano and thyme spices using single sonication-assisted extraction with methanol. The voltammetric sensor data agreed well with the independent spectrophotometric quantification.

Keywords

Electrochemical sensors, voltammetry, polymer-modified electrodes, electropolymerization, phthalein dyes, thymol, carvacrol, spices, food analysis

The name of the journal

Engineering Proceedings

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85163684467&doi=10.3390%2fASEC2022-13835&partnerID=40&md5=dc69965a9aa3f086ade36eee24b46c82

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

https://repository.kpfu.ru/eng/?p_id=286670&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Ziyatdinova Guzel Kamilevna	ru_RU
dc.contributor.author	Chernousova Natalya Anatolevna	ru_RU
dc.date.accessioned	2023-01-01T00:00:00Z	ru_RU
dc.date.available	2023-01-01T00:00:00Z	ru_RU
dc.date.issued	2023	ru_RU
dc.identifier.citation	Ziyatdinova, G. Sensitive voltammetric sensor for thymol and carvacrol based on the electropolymerized thymolphtalein / G. Ziyatdinova, N. Chernousova // Eng. Proc. – 2023. – V. 31. – � 1. – Article 5. – 7 p.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=286670&p_lang=2	ru_RU
dc.description.abstract	Engineering Proceedings	ru_RU
dc.description.abstract	Thymol and carvacrol (isopropylmethylphenols) are natural phenolic monoterpenoids with antibacterial, antifungal, insecticidal, and antioxidant properties. Their dose-dependent antioxidant effect requires control in real samples. Various modes of voltammetry have been successfully developed for thymol and carvacrol quantification. A glassy carbon electrode (GCE) modified with multi-walled carbon nanotubes (MWCNTs) and electropolymerized thymolphthalein has been developed for this purpose. The conditions of thymolphthalein electropolymerization (monomer concentration, number of cycles, and parameters of electrolysis) providing the best response to thymol have been found. The scanning electron microscopy and electrochemical methods confirm the effectivity of the sensor developed. In differential pulse mode, the sensor gives a linear response in the ranges of 0.050–25 and 25–100 μM for thymol and 0.10–10 and 10–100 μM for carvacrol, with detection limits of 0.037 and 0.063 μM, respectively, that are significantly improved compared to those reported earlier. The sensor developed is selective to isopropylmethylphenols in the presence of typical interferences (inorganic ions, saccharides, and ascorbic acid) and other phenolics (caffeic, chlorogenic, gallic and rosmarinic acids, quercetin, and rutin). A sensor has been applied for the evaluation of total isopropylmethylphenols in oregano and thyme spices using single sonication-assisted extraction with methanol. The voltammetric sensor data agreed well with the independent spectrophotometric quantification.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Electrochemical sensors	ru_RU
dc.subject	voltammetry	ru_RU
dc.subject	polymer-modified electrodes	ru_RU
dc.subject	electropolymerization	ru_RU
dc.subject	phthalein dyes	ru_RU
dc.subject	thymol	ru_RU
dc.subject	carvacrol	ru_RU
dc.subject	spices	ru_RU
dc.subject	food analysis	ru_RU
dc.title	Sensitive Voltammetric Sensor for Thymol and Carvacrol Based on the Electropolymerized Thymolphtalein	ru_RU
dc.type	Articles in international journals and collections	ru_RU