_1591959923 1591959923 Hamid Shirkhanloo sahar.zi67@gmail.com Hamid Shirkhanloo Analytical Methods in Environmental Chemistry Journal AMECJournal 2645-5382 2645-5552 12 01 2018 1 01 Ehsan Zolfonoun In this work MWCNTs-Fe3O4 nanocomposite was used as an adsorbent for extraction and preconcentration of indium from aqueous solutions. The magnetic MWCNTs with adsorbed analytes were easily separated from the aqueous solution by applying an external magnetic field. After elution of the adsorbed analytes, the concentration of indium was determined using inductively coupled plasma optical emission spectrometry determination. The effects of pH, sorbent amount, eluent type, chelating reagent concentration, sample volume and time on the recovery of the In(III) were investigated. Under the optimum conditions, the detection limit for In(III) was 0.28 μg L−1. The precision of the method, evaluated as the relative standard deviation obtained by analyzing a series of ten replicates, was 3.1 %. The method was successfully applied for the determination of In(III) in environmental water samples. 12 31 2018 5 10 10.24200/amecj.v1.i01.14 http://journal.amecj.com/index.php/AMECJ-01/article/view/14 http://journal.amecj.com/index.php/AMECJ-01/article/download/14/15 http://journal.amecj.com/index.php/AMECJ-01/article/download/14/15 http://journal.amecj.com/index.php/AMECJ-01/article/download/14/45