Document Detail

Extraction and preconcentration of trace levels of cobalt using functionalized magnetic nanoparticles in a sequential injection lab-on-valve system with detection by electrothermal atomic absorption spectrometry.
MedLine Citation:
PMID:  22200313     Owner:  NLM     Status:  In-Data-Review    
A new approach to performing extraction and preconcentration employing functionalized magnetic nanoparticles for the determination of trace metals is presented. Alumina-coated iron oxide nanoparticles were synthesized and used as the solid support. The nanoparticles were functionalized with sodium dodecyl sulfate and used as adsorbents for solid phase extraction of the analyte. Extraction, elution, and detection procedures were performed sequentially in the sequential injection lab-on-valve (SI-LOV) system followed by electrothermal atomic absorption spectrometry (ETAAS). Mixtures of hydrophobic analytes were successfully extracted from solution using the synthesized magnetic adsorbents. The potential use of the established scheme was demonstrated by taking cobalt as a model analyte. Under the optimal conditions, the calibration curve showed an excellent linearity in the concentration range of 0.01-5μgL(-1), and the relative standard deviation was 2.8% at the 0.5μgL(-1) level (n=11). The limit of detection was 6ngL(-1) with a sampling frequency of 18h(-1). The present method has been successfully applied to cobalt determination in water samples and two certified reference materials.
Yang Wang; Xiaoyu Luo; Jie Tang; Xiaoya Hu; Qin Xu; Chun Yang
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Publication Detail:
Type:  Journal Article     Date:  2011-11-19
Journal Detail:
Title:  Analytica chimica acta     Volume:  713     ISSN:  1873-4324     ISO Abbreviation:  Anal. Chim. Acta     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2011-12-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370534     Medline TA:  Anal Chim Acta     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  92-6     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier B.V. All rights reserved.
College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China; The Key Laboratory of Environmental Material and Engineering of Jiangsu Province, Yangzhou University, Yangzhou 225002, China.
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