A Simple and Cheap Ultrasound-Assisted Microextraction Procedure For Extraction of Tartrazine in Soft Drinks and Foodstuff

In this study, a simple and cheap ultrasound-assisted ionic liquid-based floating organic droplets microextraction (UA-IL-FODME) has been proposed for spectrophotometric determination of synthetic food dye (tartrazine) in soft drinks and food samples. 1-Octyl-3-methylimidazolium tetrafluoroborate [C8MIM][BF4] and 1-octanol were used as the extraction solvent and dispersant solvent, respectively. The method is based on extracting the tarrazine to the ionic phase with the help of ultrasonic effect at pH 5.5. Some experimental variables (pH, ionic liquid amount, type and volume of dispersive solvent, and ultrasonic conditions) were studied and optimized in detail. In optimum conditions, some analytical parameters of the method were as follows. Operating range, limit of detection, preconcentration factor, recovery % and RSD % values were 10-700 μg L-1, 3.2 μg L-1, 75, 94.7-104.7% and 2.7%, respectively. Following comprehensive validation studies, the recommended method was successfully applied to the extravasation and determination of tartrazine in soft drinks and foodstuff