Second-order electrochemical data generation to quantify carvacrol in oregano essential oils

DARÍO PIERINI, GASTÓN; ANDRÉS BORTOLATO, SANTIAGO; NOEL ROBLEDO, SEBASTIAN; RAQUEL ALCARAZ, MIRTA; FERNÁNDEZ, HÉCTOR; CASIMIRO GOICOECHEA, HÉCTOR; ALICIA ZON, MARÍA

FOOD CHEMISTRY

ELSEVIER SCI LTD

Año: 2022 vol. 368

0308-8146

A novel analytical method using voltammetric second-order modeling based on multivariate curve resolution-alternating least-square (MCR-ALS) is presented for the first time for the quantitation of carvacrol (CAR) in oregano essential oils (OEO). The second-order cyclic voltammetry data were generated on the basis that CAR shows a diffusional system. Thus, the scan rate (v) was used as a second instrumental mode and cyclic voltammograms at different v were acquired for a single sample, generating the second-order data. CAR determination was performed in presence of thymol, included as a potential interferent. Results demonstrated that MCR-ALS successfully exploited the second-order advantage and the recoveries were not statistically different than 100%. The limits of detection and quantitation were estimated using the MCR-ALS which were 6.27x 10?5°mol°L?1°and 1.90x 10?4°mol L?1, respectively. Finally, the developed methodology was implemented to quantify of CAR in OEO samples.