Speciation of chromium(III) and cobalt(III) (amino)carboxylate complexes using capillary electrophoresis.

  title={Speciation of chromium(III) and cobalt(III) (amino)carboxylate complexes using capillary electrophoresis.},
  author={Richard F. Carbonaro and Alan T Stone},
  journal={Analytical chemistry},
  volume={77 1},
Capillary electrophoresis (CE) can very efficiently resolve different dissolved metal ion species as long as rates of ligand exchange are slow relative to time scales required for electromigration. Here, we detail the separation of several Cr(III) and Co(III) complexes with the multidentate chelating agents iminodiacetic acid, nitrilotriacetic acid, trans-1,2-cyclohexanediaminetetracetic acid, N-(2-hydroxyethyl)ethylenediaminetriacetic acid, trimethylenediaminetetraacetic acid, and… Expand
Running buffers for determination of chromium(VI)/(III), cobalt(II) and zinc(II) in complex matrices by capillary electrophoresis with contactless conductivity detection.
Complex matrices and rather high acidity in environmental samples are often the impelling challenges for the used running buffers of capillary electrophoresis, and the malic acid systems including MA-His, MA-Arg and MA-Tris were selected as the candidates with powerful separation efficiency and good response sensitivity. Expand
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A rapid and sensitive technique for the speciation analysis of complexes of five metal ions with two aminopolycarboxylate chelator variants, namely, EDTA and EDDS, including the simultaneous quantification of those complexes, is reported. Expand
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