Preconcentration and spectrophotometric determination of aluminum and beryllium ions using ion imprinted polymer coated magnetite nanoparticles

Al3+ and Be2+ ions were extracted from water samples using solid phase extraction (SPE) based on ion imprinted polymer coated SiO2@ Fe3O4 (IIP@SiO2@ Fe3O4) nanoparticles and detected with UV-Vis spectrophotometery. The synthesized nanosorbents have been characterized using FT-IR, XRD and TEM measurements. The effects of pH, amount of adsorbent, contact time, desorption solvent, desorption time and initial sample volume were investigated and optimized as effective parameters in SPE method. The calibration curves were linear in the range of 1.0–50.0 ng mL-1 for both ions. Detection limit for Al3+ and Be2+ was obtained as 0.54 and 0.39 ng mL-1, respectively. The repeatability (n =5) expressed as the relative standard deviation (RSD%) for Al3+ and Be2+ was found to be 1.68% and 1.93%, respectively. The relative recoveries were 91-98% and 93-101% for Al3+ and Be2+, respectively. At the end, the proposed method was successfully applied to the determination of Al3+ and Be2+ in various water samples. The proposed method is precise, selective and sensitive analytical method for the determination of Al3+ and Be2+ in real samples.