Preconcentration and determination of Pb(II) using magnetic nanoparticles coated with DABCO-PDO ionic liquid with FAAS in aqueous samples

Subject Areas :

sara khodadadi ¹ , elahe konoz ^{2 *} , ali niazi ³ , ali ezabadi ⁴

1 - دانشجوی دکترای شیمی تجزیه، گروه شیمی، ، دانشگاه آزاد اسلامی واحد تهران مرکز، تهران، ایران
2 - دانشیار شیمی تجزیه، گروه شیمی، دانشگاه آزاد اسلامی واحد تهران مرکز، تهران، ایران
3 - استاد شیمی تجزیه، گروه شیمی، دانشگاه آزاد اسلامی واحد تهران مرکز، تهران، ایران
4 - استادیار شیمی آلی، گروه شیمی، دانشگاه آزاد اسلامی واحد تهران مرکز، تهران، ایران

Received: 2020-01-28 Accepted : 2020-07-04 Published : 2021-08-23

Keywords: Lead, FAAS, Magnetic nanoparticles coated with DABCO-PDO, Aqueous samples,

Abstract :

In this study, magnetic nanoparticles modified with DABCO-PDO ionic liquid were used to preconcentration and determination of trace amount of Pb(II) in aqueous samples using a flame atomic absorption instrument. Experimental factors affecting Pb(II) extraction and preconcentration were investigated and optimized. The calibration curve for Pb(II) was linear under the optimum condition in the concentration range of 0.8-1.6 µg l-1 with the determination coefficient of 0.9986. The concentration factor of Pb(II) was 100 with the detection limit of 0.25 µg l-1. The relative standard deviations (RSD %) for the concentration of the method were 1.8 and 2.5, respectively, with 4 successive replications in one day and between days. Lead determination was successfully applied for aqueous samples (rainwater in Tehran, tap water in Shahrak Gharb, Tehran, and mineral water). Recoveries in the ranges 90.6-97.8 was reported. Structure and morphology of the synthesized nanosorbent were investigated by using Fourier transform infrared spectroscopy (FTIR) analysis, scanning electron microscopy (SEM), and X-ray powder diffraction (XRD). 

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