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Basati G, Shiri S. Ultrasonic-assisted green liquid extraction micro-extraction method based on solvent-based polymer nanoparticles for kinematic, ferulic, gallic acid and rutin measurements in olive, almond and sesame oil samples by HPLC-UV. Journal title 2019; 2 (3)
URL: http://newresearch.medilam.ac.ir/article-1-722-en.html

Abstrac
A novel, simple, sensitive and green ultrasonic-assisted liquid–liquid microextraction method based on a synthetic citric
acid–glycerol nanopolymer solution was used for the extraction of antioxidant acids (ferulic, cinnamic, gallic acid and rutin)
in five kinds of oil samples from vegetables. The synthetic nanopolymer from citric acid and glycerol with absolute molar
ratio was synthesized, and its specifications were characterized by (FTIR, DLS, GPC, AFM and NMR). Its solution as a
green extractor for oil samples was added to n-hexane containing analytes. Then, the extraction was speeded up by using
ultrasonic. After the extraction, phase separation (rich phase/n-hexane phase) was accomplished by using a centrifugation.
Rich phase in lower phase was removed by a micro-syringe and injected to reverse-phase HPLC with UV detector. Volume
of nanopolymer solution, concentration of nanopolymer, extraction time and temperature of ultrasonic bath were optimum
conditions and obtained by response surface methodology. This method has good linear calibration ranges between 0.7 and
1300 μg L−1, coefficients of determination (r2 > 0.9831) and low limits of detection between 0.05 and 0.81 μg L−1. This
method was successfully used to determine target analytes in oil samples of olive, almond, sesame, hazelnut and edible with
satisfactory inter–intraday precision and recoveries (93t.4–107.1%)..