Abstract

SILVER, B. R.. Atomic Absorption Spectroscopy Reveals Anomalous Transfer of Heavy Metal across a Water/1,2-DCE Interface. Port. Electrochim. Acta [online]. 2021, vol.39, n.6, pp.415-420.  Epub Dec 31, 2021. ISSN 0872-1904.  https://doi.org/10.4152/pea.2021390603.

Atomic absorption spectroscopy (AAS) of samples taken from the organic phase of a water/1,2-dichloroethane (1,2-DCE) interfacial electrochemical cell, rendered non-polarizable by the tetraphenylarsonium common-ion, revealed significant transfer of heavy metal from the aqueous phase. Heavy metal concentration found within 1,2-DCE cannot be explained via ion pair formation between the metallic species and the common-ion, nor by ion pair formation between the metallic species and the hydrophobic anion of the organic phase. Results suggest that metal may have been anomalously transferred into 1,2-DCE within water-in-oil droplets formed by spontaneous emulsification of the interfacial region.

Keywords : liquid/liquid; extraction; metal; non-polarizable; ITIES (interface between two immiscible electrolyte solutions).

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