Multiple stirred-flow chamber assembly for simultaneous automatic fractionation of trace elements in fly ash samples using a multisyringe-based flow system

Analytical Chemistry
Warunya BoonjobVíctor Cerdà

Abstract

There is a current trend in automation of leaching tests for trace elements in solid matrixes by use of flow injection based column approaches. However, as a result of the downscaled dimensions of the analytical manifold and execution of a single extraction at a time, miniaturized flow-through column approaches have merely found applications for periodic investigations of trace element mobility in highly homogeneous environmental solids. A novel flow-based configuration capitalized on stirred-flow cell extraction is proposed in this work for simultaneous fractionation of trace elements in three solid wastes with no limitation of sample amount up to 1.0 g. A two-step sequential extraction scheme involving water and acetic acid (or acetic acid/acetate buffer) is utilized for accurate assessment of readily mobilizable fractions of trace elements in fly ash samples. The fully automated extraction system features high tolerance to flow rates (< or = 6 mL min(-1)) and, as opposed to operationally defined batchwise methods, the solid to liquid ratio is not a critical parameter for determination of overall readily leachable trace elements provided that exhaustive extraction is ensured. Analytical performance of the dynamic extractor is...Continue Reading

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Citations

Feb 26, 2016·The Analyst·Marek Trojanowicz, Kamila Kołacińska
Jun 18, 2019·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Meichao ZhaoMasanobu Mori
Aug 14, 2010·Environmental Science & Technology·Michael P BeestonHylke J Glass

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