Solid phase extraction and determination of indium usingmulti-walled carbon nanotubes modified with magneticnanoparticles

In this work MWCNTs-Fe3O4 nanocomposite was used as an adsorbentfor extraction and preconcentration of indium from aqueous solutions.The magnetic MWCNTs with adsorbed analytes were easilyseparated from the aqueous solution by applying an external magneticfield. After elution of the adsorbed analytes, the concentration of indiumwas determined using inductively coupled plasma optical emissionspectrometry determination. The effects of pH, sorbent amount, eluenttype, chelating reagent concentration, sample volume, and time on therecovery of the In(III) were investigated. Moreover, under the optimumconditions, the detection limit for In(III) was 0.28 μg L−1. Theprecision of the method, evaluated as the relative standard deviationobtained by analyzing a series of ten replicates, was 3.1 %. Ultimately,the method was successfully applied for the determination of In(III) in.environmental water samples

کلیدواژه ها:

Indium ، Preconcentration ، Carbon nanotubes ، Fe3O4 nanoparticles ،