Isotope Dilution Analysis of Indium Using Aliquat -336 as a Substoichiometric Reagent

A simple and rapid radiometric method for the determination of indium based on its extraction as an ion-pair with iodide and a substoichiometric amount of Aliquat®-336 (methyltriocylammo-nium chloride) is described. The activity of the extracted indium is measured by Liquid Scintillation Counting. A detection limit of 0.6 (µg in 100 mL aqueous volume could be achieved after removing the interfering ions by collecting indium quantitatively over iron(III) hydroxide. © 2013, Oldenbourg Wissenschaftsverlag GmbH, Rosenheimer Str. 145, 81671 München. All rights reserved.