Ionic liquid-supported Cuo-ROD nanocomposite by dispersive solid phase extraction for sample preparation of some phthalates in bottled water

Release of phthalates as a plastics additive from bottles to drinking water is a source of risk. A novel dispersive solid phase extraction (DSPE) with dual polarity was prepared for trace analysis of some phthalates. Adsorbent consisted of magnetic nano silica aerogel (MSi) coated by CuO ROD (CuR) which was supported with ionic liquid (IL). Produced MSi@CuR@IL was characterized by SEM, VSM, BET, EDS, FTIR, C/H/N elemental analysis and TGA. According to results, optimized condition was evaluated in 24 mg MSi@CuR@IL, sample absorption time of 14 min at pH = 6.2 by suspension speed of 700 RPMI. Using optimized method suitable performance was presented including detection limit of 0.78-1.25 mu g/L, with recovery of 92.21-102.12 and repeatability of <10 %. Evaluated DSPE was performed in 10 plastic bottled water between 8.9 and 195.3 mu g/L. Finally, simultaneous application of CuR on the surface of MSi as a polar section and IL with polar and nonpolar properties were provided a potent DSPE for phthalates determination. Designing two-side properties for attraction polar and nonpolar fragment is the advantage of suggested DSPE. Accordingly, a simple and rapid method has been developed for trace monitoring of di (2-ethylhexyl) phthalate (DEHP), dimethyl phthalate (DMP) and diethyl phthalate (DEP) in bottled water. Not assessing of different type of phthalate is the limitation of our study