Abstract
Solid-phase extraction (SPE) is an effective tool for the preconcentration of trace elements and their separation from various sample constituents. Octadecyl and other alkyl-bonded silica gels are most widely used for these purposes. The fundamentals of the SPE of inorganic ions are reviewed and compared with those of related techniques (liquid-liquid extraction and reversed-phase liquid chromatography). The extraction of ions in the form of chelate compounds, inorganic salts solvated by neutral reagents, and ion-pair compounds is considered. Numerous applications of SPE to the separation and preconcentration of different elements and their species, including on-line combinations with instrumental determination techniques, are described and tabulated.
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Spivakov, B.Y., Malofeeva, G.I. & Petrukhin, O.M. Solid-Phase Extraction on Alkyl-bonded Silica Gels in Inorganic Analysis. ANAL. SCI. 22, 503–519 (2006). https://doi.org/10.2116/analsci.22.503
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DOI: https://doi.org/10.2116/analsci.22.503