Flow injection on-line solid phase extraction coupled with inductively coupled plasma mass spectrometry for determination of (Ultra)trace rare earth elements in environmental materials using maleic acid grafted polytetrafluoroethylene fibers as sorbent
Journal Article
·
· Journal of the American Society for Mass Spectrometry
- Nankai University, Key Laboratory of Functional Polymer Materials, Ministry of Education, Research Center for Analytical Sciences, College of Chemistry (China)
A new sorbent, maleic acid grafted polytetrafluoroethylene fiber (MA-PTFE), was prepared and evaluated for on-line solid-phase extraction coupled with inductively coupled plasma mass spectrometry (ICP-MS) for fast, selective, and sensitive determination of (ultra)trace rare earth elements (REEs) in environmental samples. The REEs in aqueous samples at pH = 3.0 were selectively extracted onto a microcolumn packed with the MA-PTFE fiber, and the adsorbed REEs were subsequently eluted on-line with 0.9 mol l{sup −1} HNO{sub 3} for ICP-MS determination. The new sorbent extraction system allows effective preconcentration and separation of the REEs from the major matrix constituents of alkali and alkali earth elements, particularly their separation from barium that produces considerable isobaric interferences of {sup 134}Ba{sup 16}O{sup 1}H{sup +}, {sup 135}Ba{sup 16}O{sup +}, {sup 136}Ba{sup 16}O{sup 1}H{sup +}, and {sup 137}Ba{sup 16}O{sup +} on {sup 151}Eu{sup +} and {sup 153}Eu{sup +}. With the use of a sample loading flow rate of 7.4 ml min{sup −1} for 120 s preconcentration, enhancement factors of 69–97 and detection limits (3s) of 1–20 pg l{sup −1} were achieved at a sample throughput of 22 samples h{sup −1}. The precision (RSD) for 16 replicate determinations of 50 ng l{sup −1} of REEs was 0.5–1.1%. The developed method was successfully applied to the determination of (ultra)trace REEs in sediment, soil, and seawater samples.
- OSTI ID:
- 22774021
- Journal Information:
- Journal of the American Society for Mass Spectrometry, Journal Name: Journal of the American Society for Mass Spectrometry Journal Issue: 9 Vol. 17; ISSN JAMSEF; ISSN 1044-0305
- Country of Publication:
- United States
- Language:
- English
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