期刊
MICROCHIMICA ACTA
卷 178, 期 3-4, 页码 405-412出版社
SPRINGER WIEN
DOI: 10.1007/s00604-012-0857-7
关键词
Magnetic solid phase extraction; Trace metal ions; 2,6-Diminopyridine; Nanoparticle
资金
- Foundation of Xi'an University of Arts and Science [ZD200902]
- Special Foundation of Department of Education of Shan Xi Province [11JK0574]
We have modified silica-coated Fe3O4 nanoparticles with 2,6-diaminopyridine and used these for selective magnetic solid-phase extraction of trace amounts of metal ions. The nanoparticles were characterized by transmission electron microscopy and Fourier transform infrared spectroscopy. Quantitative extraction of trace amounts of Cu(II) and Zn(II) from mixed-ion solutions was accomplished at an optimal pH value of 6 within less than 10 min. The metal ions were eluted from the sorbent with hydrochloric acid. Common electrolytes and chemically related metal ions do not interfere. The relative standard deviations of the method are < 4 %. It was successfully applied to the separation and preconcentration of trace metal ions from the certified reference materials GBW 08301 (river sediment) and GBW 08607 (water solution), in natural water, and in samples of vegetable with satisfying results.
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