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Updated: Jun 28, 2026

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies
Published on: July 1, 2016
A fully automated flow injection atomic absorption system for the determination of copper traces in waters with
J L Burguera1, M Burguera, P Carrero
1Department of Chemistry Faculty of Sciences University of Los Andes PO Box 542 Mérida 5101-A Venezuela.
Abstract:
The paper describes the development of an automatic on-line column pre-concentration technique using a time based-flow injection atomic absorption spectrometry system. A manifold incorporating a micro-column containing 25 mg of Dowex 50W-X8 was used with a time-based injector for the pre-concentration and determination of copper in natural and drinking waters. The system features depend on the alternate positions of a solenoid valve. The 3sigma detection limits, enrichment factors, sampling frequency, relative standard deviations and linear calibration graphs were, respectively, in the range 0.6-1.5 mug/l, 25-60, 15-30 measurements/h, 1.0-3.1% and 1-65 mug/ml for pre-concentration times of 1 min. The procedure was successfully applied to a range of water samples and the accuracy was assessed through recovery experiments, the analysis of certified reference water samples and by independent analysis by atomic absorption spectrometry with electrothermal atomization.
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