Journal
FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT
Volume 38, Issue 2, Pages 339-349Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/19440049.2020.1852320
Keywords
Hydrophobic deep eutectic solvent; ultrasonic-assisted liquid-liquid micro-extraction; HPLC; diphenylamine; fruits
Funding
- National Natural Science Foundation of China [21606031]
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This study investigated a novel and efficient hydrophobic deep eutectic solvent (DES) extraction technique, achieved the determination of trace components in fruits by optimizing working parameters and combining liquid-liquid micro-extraction (LLME) and high-performance liquid chromatography (HPLC) analysis, with lower detection limits.
In this paper, novel high extraction efficiency hydrophobic eutectic solvents (DESs), n-octanoic acid as a hydrogen bond donor (HBD) and menthol as a hydrogen bond acceptor (HBA), were selected from five hydrophobic DESs to extract trace diphenylamine (DPA) in fruits apple, pear and orange under ultrasonic-assisted liquid-liquid micro-extraction (UA-LLME) technology before high-performance liquid chromatography (HPLC) analysis. Working parameters such as the DESs type, molar ratio, extractant volume, and ultrasonic time of the LLME hydrophobic DESs technology were optimised. Average recoveries between 96% and 108% were obtained on actual samples. This method gave lower detection limit (LOD) than other existing methods due to combining the high-efficiency extraction of hydrophobic DES and high sensitivity of fluorescence detector. This method was sensitive and eco-friendly, and can be used for the determination of trace components in fruits.
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