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Title: Recent developments in automatic solid-phase extraction with renewable surfaces exploiting flow-based approaches
Authors: Manuel Miró
Supaporn Kradtap Hartwell
Jaroon Jakmunee
Kate Grudpan
Elo Harald Hansen
Keywords: Chemistry
Environmental Science
Issue Date: 1-Oct-2008
Abstract: Solid-phase extraction (SPE) is the most versatile sample-processing method for removal of interfering species and/or analyte enrichment. Although significant advances have been made over the past two decades in automating the entire analytical protocol involving SPE via flow-injection approaches, on-line SPE assays performed in permanent mode lack sufficient reliability as a consequence of progressively tighter packing of the bead reactor, contamination of the solid surfaces and potential leakage of functional moieties. This article overviews the current state-of-the-art of an appealing tool for overcoming the above shortcomings, so-called bead-injection (BI) analysis, based on automated renewal of the sorbent material per assay exploiting the various generations of flow-injection analysis. It addresses novel instrumental developments for implementing BI and a number of alternatives for on-line chemical-derivatization reactions, and it pinpoints the most common instrumental detection techniques utilized. We present and discuss in detail relevant environmental and bioanalytical applications reported in the past few years. © 2008 Elsevier Ltd. All rights reserved.
ISSN: 01659936
Appears in Collections:CMUL: Journal Articles

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