Journal
FOOD ANALYTICAL METHODS
Volume 10, Issue 9, Pages 3209-3215Publisher
SPRINGER
DOI: 10.1007/s12161-017-0891-5
Keywords
DESs; High-performance liquid chromatography; tert-Butylhydroquinone; Edible oil; Microextraction
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Funding
- National Natural Science Foundation of China [31671818]
- Young-aged Backbone Teacher Funds of Henan Province of China [2014GGJS-058]
- Project of Henan University of Technology Excellent Young Teachers [2014003]
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A green and inexpensive ultrasonic-assisted liquid-liquid microextraction (UALLME) technique based on deep eutectic solvents (DESs) was employed in the extraction and separation of tert-butylhydroquinone (TBHQ) from edible oils. In a typical experiment, 400 mu L DES as extraction solvent was added to 3.0 mL sample solution containing 0.15 g edible oil, and then ultrasonic-assisted extraction was applied. After centrifugation, DES phase containing TBHQ was directly analyzed by reverse phase high-performance liquid chromatograph-ultraviolet detector (HPLC-UV) and no phase inversion was involved, which can simplify the sample pretreatment process. Under optimized condition, TBHQ showed a linear calibration curve in the range of 5 similar to 500 mg/kg (r(2) = 0.9998) and lower limit of detection (LOD) of 0.02 mu g/mL. The recoveries were in the range of 98.5 similar to 112%, and the intraday and inter-day precision were less than 3.2%. This method was successfully applied to the determination of TBHQ in 13 edible oil (e.g., soybean oil, blend oil) samples, which the result was close to that for conventional liquid-liquid extraction with methanol as solvent.
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