Flow-injection preconcentration and electrothermal atomic absorption spectrometry determination of manganese in seawater

A procedure for the determination of manganese in seawater by flow-injection preconcentration coupled to electrothermal atomic absorption spectrometry was developed. The analyte is complexed by 1-(1-hydroxy-2-naphthylazo)-6-nitro-2-naphthol-4-sulphonic acid (Eriochrome Black T), its complexes are retained onto an anion exchange resin, and eluted with hydrochloric acid. A software driven preconcentration apparatus was set up and a new housing for the enrichment column was designed and adopted. After studying the effect of acidity and ligand concentration, the accuracy of the procedure was assessed by analysis of certified seawater. (C) 2001 Elsevier Science B.V. All rights reserved.