Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10559924 | Talanta | 2005 | 7 Pages |
Abstract
A 100-fold preconcentration procedure based on rare-earth elements (REEs) separation from water samples with an extraction chromatographic column has been developed. The separation of REEs from matrix elements (mainly Fe, alkaline and alkaline-earth elements) in water samples was performed loading the samples, previously acidified to pH 2.0 with HNO3, in a 2 ml column preconditioned with 20 ml 0.01 M HNO3. Subsequently, REEs were quantitatively eluted with 20 ml 7 M HNO3. This solution was evaporated to dryness and the final residue was dissolved in 10 ml 2% HNO3 containing 1 μg lâ1 of cesium used as internal standard. The solution was directly analysed by inductively coupled plasma mass spectrometry (ICP-MS), using ultrasonic nebulization, obtaining quantification limits ranging from 0.05 to 0.10 ng lâ1. The proposed method has been applied to granitic waters running through fracture fillings coated by iron and manganese oxy-hydroxides in the area of the Ratones (Cáceres, Spain) old uranium mine.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Carolina Hernández González, Alberto J. Quejido Cabezas, Marta Fernández DÃaz,