TY - JOUR

T1 - Automated reversed-phase liquid-liquid microextraction based on deep eutectic solvent for the determination of copper as vegetable oil oxidation catalyst

AU - Шишов, Андрей Юрьевич

AU - Gurev, Ivan

AU - Булатов, Андрей Васильевич

PY - 2023/6/1

Y1 - 2023/6/1

N2 - A fully automated reversed-phased liquid-liquid microextraction approach based on deep eutectic solvent was developed for the copper determination in vegetable oils by atomic absorption spectroscopy detection. Copper acts as a catalyst in the oxidation of polyunsaturated fatty acids in vegetable oils. The procedure assumed mixing oil and extractant (based on choline chloride, lactic acid, and water) with a magnetic stirrer into a syringe pump of a flow system followed by spontaneous phase separation and the analyte determination in the extract phase. A chelating mechanism was involved for microextraction of the copper. Lactic acid as precursor of the deep eutectic solvent acted as a chelating agent. Water allowed to reduce extractant viscosity to perform the automated procedure. Under optimal conditions the concentration range was from 0.3 to 15 µg kg−1, a determination coefficient was 0.9992, and the limit of detection was 0.1 μg kg−1. The RSD values were < 7.6 %. The developed procedure did not require microwave mineralization and allowed to exclude consumption of organic solvents for sample pretreatment.

AB - A fully automated reversed-phased liquid-liquid microextraction approach based on deep eutectic solvent was developed for the copper determination in vegetable oils by atomic absorption spectroscopy detection. Copper acts as a catalyst in the oxidation of polyunsaturated fatty acids in vegetable oils. The procedure assumed mixing oil and extractant (based on choline chloride, lactic acid, and water) with a magnetic stirrer into a syringe pump of a flow system followed by spontaneous phase separation and the analyte determination in the extract phase. A chelating mechanism was involved for microextraction of the copper. Lactic acid as precursor of the deep eutectic solvent acted as a chelating agent. Water allowed to reduce extractant viscosity to perform the automated procedure. Under optimal conditions the concentration range was from 0.3 to 15 µg kg−1, a determination coefficient was 0.9992, and the limit of detection was 0.1 μg kg−1. The RSD values were < 7.6 %. The developed procedure did not require microwave mineralization and allowed to exclude consumption of organic solvents for sample pretreatment.

KW - Automation

KW - Copper

KW - Deep eutectic solvent

KW - Food analysis

KW - Food composition

KW - Lab-in-syringe

KW - Oxidation catalyst

KW - Reversed-phase liquid-liquid microextraction

KW - Vegetable oil

UR - https://www.mendeley.com/catalogue/8c000d85-b2fa-3717-9007-e2e44af5c9dd/

U2 - 10.1016/j.jfca.2023.105247

DO - 10.1016/j.jfca.2023.105247

M3 - статья

VL - 119

JO - Journal of Food Composition and Analysis

JF - Journal of Food Composition and Analysis

SN - 0889-1575

M1 - 105247

ER -