Abstract
The hydrogen chromate anion (HCrO4 –), which is the predominant species in acidic solutions and solutions with low chromium concentration, was determined by capillary zone electrophoresis (CZE) using UV detection on-column at 200 nm. A fused-silica capillary (55 cm × 50 μm i.d.) was employed with a high negative voltage of 20 kV. Total chromium was determined after reduction by H2O2 and its complexation by EDTA. The use of H2O2 as reducing agent is advantageous, as it does not increase the conductivity of the solution. Detection limits achieved (for 200 s injection time) were 30 and 8 μg/L for Cr(VI) and Cr(III), respectively. The CZE results obtained for Cr(III) and Cr(VI) were compared with those obtained by ion exchange with subsequent AAS.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
Author information
Authors and Affiliations
Additional information
Received: 6 May 1999 / Revised: 18 October 1999 / Accepted: 25 October 1999
Rights and permissions
About this article
Cite this article
Baraj, B., Hax Niencheski, L., Soares, J. et al. Comparison of chromium speciation by CZE and ion exchange followed by AAS. Fresenius J Anal Chem 367, 12–16 (2000). https://doi.org/10.1007/s002160051591
Issue Date:
DOI: https://doi.org/10.1007/s002160051591