The application of flow injection iminodiacetic acid ethylcellulose membrane preconcentration and separation technique to atomic spectrometry

Abstract

A flow injection-based on-line iminodiacetic acid-ethylcellulose (IDAEC) membrane preconcentration and separation technique was developed in the present work, which has the advantages of easy operation without membrane plugging problems; a high enrichment factor (more than 10 for most elements); a high sample throughput (30 samples h(-1)). The characteristics of the IDAEC membrane were systematically studied, including the effect of sample flow rate and analyte concentration on breakthrough point; dynamic capacity and the lifetime of the IDAEC membrane. The technique was successfully applied to Fond and seawater analysis in which all elements studied are in ng ml(-1) level. The analytical performance was verified with recovery of a standard addition from seawater. Satisfactory results were obtained. (C) 1998 Elsevier Science B.V. All rights reserved.