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Kalman filter deconvolution after cubic splines background removal in the HPLC determination of Cr(III) and Al(III) as 8-hydroxyquinolines

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Summary

A procedure for the simultaneous quantitation of Al(III) and Cr(III) ions by reversed-phase HPLC, after pre-column complexation with 8-hydroxyquinoline, is described. The deconvolution of the partially overlapped peaks was by the Kalman filter method which yielded accurate and precise results.

Background removal from the chromatograms was by a new approach employing cubic splines as interpolators between the peak valleys.

Finally, it is shown that the Kalman filter deconvolution, after subtraction of the background by cubic spline interpolation, allowed quantitation of Al(III) and Cr(III) down to 25 ppb for each metal. These concentrations were not detectable by conventional integration methods due to a very low signal-to-noise ratio.

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Authors and Affiliations

  1. Laboratorio di Chimica Analitica, Dipartimento di Chimica della Universita, Trav. 200 Re David, 4 70126, Bari, Italy

    T. Rotunno, F. Palmisano & P. G. Zambonin

  2. CNR Istituto di Ricerca Sulle Acque Bari, 70126, Bari, Italy

    G. Tiravanti

Authors
  1. T. Rotunno
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  2. F. Palmisano
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  3. G. Tiravanti
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  4. P. G. Zambonin
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Rotunno, T., Palmisano, F., Tiravanti, G. et al. Kalman filter deconvolution after cubic splines background removal in the HPLC determination of Cr(III) and Al(III) as 8-hydroxyquinolines. Chromatographia 29, 269–274 (1990). https://doi.org/10.1007/BF02317917

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  • DOI: https://doi.org/10.1007/BF02317917

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