A novel approach for an automated liquid/liquid extraction system—principle and application for the determination of several trace contaminants in highly alloyed steels and base alloys
作者： Helmar Wiltsche , Karl Prattes , Günter Knapp
DOI: 10.1007/S00216-011-4666-3
关键词: Sample preparation 、 Liquid–liquid extraction 、 Alloy steel 、 Certified reference materials 、 Trioctylphosphine oxide 、 Inductively coupled plasma atomic emission spectroscopy 、 Aqueous two-phase system 、 Chemistry 、 Analytical chemistry 、 Atomic absorption spectroscopy
摘要: A novel automated liquid/liquid extraction system was developed for the determination of trace contaminants in unalloyed, alloyed and highly steels super alloys. In presented batch aqueous phase non-water miscible organic were brought into close contact by high-speed stirring with a magnetic stir bar. Iodide complexes Ag, Bi, Cd, Pb, Sb, Sn, Tl, Zn extracted from steel digests 4-methylpentan-2-one (MIBK) containing 20 g L−1 trioctylphosphine oxide. Tl quantitatively whereas yields 83%, 61% 75% respectively. Using high resolution continuum source flame AAS (HR-CS-FAAS) analyte quantification method validated using 21 certified reference materials (CRMs).
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