Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10558600 | Spectrochimica Acta Part B: Atomic Spectroscopy | 2005 | 5 Pages |
Abstract
A new method has been developed for the determination of trace rare earth elements (REEs) in water samples based on preconcentration with a microcolumn packed with multiwalled carbon nanotubes (MWNTs) prior to their determination by inductively coupled plasma atomic emission spectrometry (ICP-AES). The optimum experimental parameters for preconcentration of REEs, such as pH of the sample, sample flow rate and volume, elution solution and interfering ions, have been investigated. The studied REEs ions can be quantitatively retained by MWNTs when the pH exceed 3.0, and then eluted completely with 1.0 mol Lâ1 HNO3. The detection limits of this method for REEs was between 3 and 57 ng Lâ1, and the relative standard deviations (RSDs) for the determination of REEs at 10 ng mLâ1 level were found to be less than 6% when processing 100 mL sample solution. The method was validated using a certified reference material, and has been successfully applied for the determination of trace rare earth elements in lake water and synthetic seawater with satisfactory results.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Pei Liang, Yan Liu, Li Guo,