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

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