Design of a multi-channel dropping segmenter for liquid-liquid extraction continuous flow-injection analysis

A simple dual-channel dropping segmenter was used for the simultaneous introduction of aqueous solutions of a sample and an organic analytical reagent directly into a continuous flow of an immiscible organic solvent. Droplets of precisely defined volume of the homogeneous reaction mixture are formed...

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Bibliographic Details
Published in:Analytica chimica acta 1991, Vol.245 (2), p.251-257
Main Authors: Kuban, Vlastimil, Ingman, Folke
Format: Article
Language:English
Subjects:
Chemistry
Copper
Exact sciences and technology
Extraction
Flow system
General and physical chemistry
Segmenter
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:A simple dual-channel dropping segmenter was used for the simultaneous introduction of aqueous solutions of a sample and an organic analytical reagent directly into a continuous flow of an immiscible organic solvent. Droplets of precisely defined volume of the homogeneous reaction mixture are formed at the junction of the inlet capillary system. Reaction and extraction take place simultaneously in the individual segments of the aqueous phase during the transport through the reaction/extraction coil. An analytical signal is measured by an “on-tube” fast-reading spectrophotometric detector and processed mathematically. The applicability of the method is demonstrated with the determination of Cu(II) ions with tetramethylene-dithiocarbamate in neutral medium in 0.1 M ammonium acetate buffer.
ISSN:0003-2670
1873-4324
DOI:10.1016/S0003-2670(00)80229-9