Preconcentration and atomic spectrometric determination of rare earth elements (REEs) in natural water samples by inductively coupled plasma atomic emission spectrometry

Abstract

The usage of a variety of sorbents has been shown as promising matrix removal/preconcentration strategies for the determination of rare earth elements (REEs) in various natural water samples by inductively coupled plasma atomic emission spectrometry (ICP-AES). The sorption efficiency of various zeolites (clinoptilolite, mordenite, zeolite Y, zeolite Beta), ion-exchangers (Amberlite CG-120, Amberlite IR-120, Rexyn 101, Dowex 50W X18) and chelating resins (Muromac, Chelex 100, Amberlite IRC-718) towards REEs was investigated in terms of solution pH, shaking time and sorbent amount. The results have shown that most of the materials can take up REEs at a wide pH range. The experiments were continued with clinoptilolite, zeolite Y and Chelex 100 and it was demonstrated that all three materials displayed very fast kinetics for REE sorption (higher than 96% in 1 min). Desorption from the sorbents was realized with 2.0 M HNO 3 for clinoptilolite and 0.1 M HNO 3 for zeolite Y and Chelex 100. Only the lower concentration range (0.01-2.0 mg l −1 ) of matrix-matched standards were used in quantitation although the calibration graphs were linear at least up to 10.0 mg l −1 for all REEs studied. The limit of detection (3 s) without preconcentration was 0.1, 1.0, and 0.2 g l −1 for Eu, La, and Yb, respectively. The validity of the method with the selected sorbents was checked through spike recovery experiments.

Removal of aqueous rare earth elements (REEs) using nano-iron based materials

“…These include coprecipitation [4], liquid-liquid extraction [5], solid-phase extraction [6], ion-exchange [7], adsorption [8], and biosorption [9].…”

New approach of a transient ICP-MS measurement method for samples with high salinity

“…In literature the manual pre-concentration with ion exchangers (AmberliteCG-120, Dowex Marathon C, Rexyn 101) or chelating resins (Muromac, Chelex 100, NOBIAS-CHELATE PA1, Hitachi High-Tech Co., Japan) is discussed [10,11]. Some research groups developed functional methods by separation and concentration of trace elements like thorium, uranium or neodymium in seawater samples [12][13][14][15].…”

Preparation, characterization and applications of novel iminodiacetic polyurethane foam (IDA-PUF) for determination and removal of some alkali metal ions from water

“…Chelating ion exchangers are distinguished from the ordinary type of ion exchanger materials by main properties, selectivity, bond strength, sorption capacity and kinetics. The chelating resins, e.g., Amberlite IRC-718, Chelite-C, Chelex-100 and Muromac A-1, which contain iminodiacetic acid functional groups [-CH 2 -N(CH 2 -COOH) 2 ] were used as amplifiable for a wide range of metals [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. The applications of these chelating resins to metal speciation measurements were used in both batch and column modes.…”