مشخصات پژوهش

Phthalate esters (PEs) are chemical compounds that are widely used since they improve the softness and flexibility of plastics. These compounds have come to the attention of governments and the public in recent years because of their use as plasticizers in consumer products, medical devices,children’s toys, and various kinds of packaging [1]. These compounds are not inert and can easily migrate into the environment as they are not chemically bonded to the polymer matrices that contain them [2]. Phthalates present as contaminants in food come mainly from plastic packages, some studies have helpedclarify the mechanismof migration of phthalates from plastic packages (especiallypolyvinyl chloride) to food, plastic bottles to oiland cap-sealing resins to bottled foods [3]. In this study, a simple, fast, cheap and low organic- solvent consuming method namely air – assisted liquid-liquid microextraction was used for the extraction of some phthalate esters from edible oils. Then, preconcentration of the analytes was performed by dispersive liquid-liquid microextraction and obtained sedimented phase from this step was transferred into another tube and dried under nitrogen gas. Finally, 10 μL methanol was added to this tube and 2 μL of that was injected into gas chromaography- flame ionization detection (GC-FID). Several experimental parameters affecting both extraction and preconcentration steps were investigated and optimized. Finally, the method was successfully applied in determination of the target analytes in different edible oils.Under the optimum extraction conditions, the method shows wide linear ranges and low limits of detection between 0.05-500 and 0.007-0.023 µg L-1, respectively. Enrichment facrors and extraction recoveries are in the ranges of 102-500 and 20-100% respectively. References 1. Farajzadeh M. A., Yadeghari A., Khoshmaram L., Ghorbanpour H., Anal. Methods, 2014, 6, 5314. 2. Farajzadeh M. A., Khoshmaram L., Alizadeh Nabil A.A., J. Food. Compos. Anal.,