INTEGRATED FIA HPLC METHOD FOR PRECONCENTRATION AND DETERMINATION OF TRANSITION-METAL IONSReport as inadecuate




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Resumen

An automatic method based on the combination of a flow injection FI manifold with a liquid chromatograph has been developed for the enrichment and determination of transition metal ions in water samples. Alternatively, the FI configuration can be used as a screening system for the determination of the total concentration of heavy metals. Two-parameter expressions for calibration graphs involving preconcentration time and concentration of the analytes were established for both the FIA and the integrated FIA-HPLC methods. The preconcentration time depends on the concentration level of the analytes in the samples. The method is linear in the range 2-200 ng-ml, with r.s.d. values between 1.5 and 5.0. It has been applied to the determination of copper, lead, zinc, nickel, cobalt, cadmium and manganese in synthetic water samples.Nota general

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Author: Fernández Romero, J. M.; - De Castro, M. D. L.; - Richter Duk, Pablo; - Valcarcel, Miguel; -

Source: http://repositorio.uchile.cl/



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