Premium
Investigation of the stability of anionic isotachophoretic zones formed by ethylenediaminetetraacetic acid and nitrilotriacetic acid metal complexes
Author(s) -
Thormann Wolfgang
Publication year - 1985
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.1150060410
Subject(s) - nitrilotriacetic acid , ethylenediaminetetraacetic acid , chemistry , chelation , metal , inorganic chemistry , chromatography , organic chemistry
The formation of anionic complexes with chelating ligands like ethylenediaminetetraacetic acid or nitrilotriacetic acid is useful for the anionic isotachophoretic determination of selected metals. A zone comprising such a metal complex may decompose gradually under the influence of the electric current. The kinetic behavior of various complex zones is determined in a capillary‐type apparatus with a linear array of 255 potential gradient sensors. The discussed examples comprise both systems where complex formation occurred in the sample solution prior to its injection into the isotachophoretic column and where an in situ formation of the complex took place under current flow.