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Intersection point method (IPM): theoretical basis and application to spectrophotometric analyses

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Abstract

The Intersection Point Method (IPM) is a new method for the determination of an analyte in the presence of several unknown interferences. The method is based on the Apparent Content Curves (ACC) from derivative signals. To test the proposed procedure an analysis of mixtures of indicators with strong spectral overlapping was carried out. Results obtained agree with the theoretical values. Besides, the determination of caffeine in several pharmaceuticals by IPM provides good results.

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Authors and Affiliations

  1. Departament de Química Analítica, Universitat de Valencia Estudi Genèral, Dr Moliner 50, E-46100, Burjassot, Valencia, Spain

    A. Cerdán-Vidal, A. R. Maurí-Aucejo, M. Llobat-Estellés & M. C. Pascual-Martí

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  1. A. Cerdán-Vidal
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  2. A. R. Maurí-Aucejo
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  3. M. Llobat-Estellés
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  4. M. C. Pascual-Martí
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Received: 11 April 1996 / Revised: 10 June 1996 / Accepted: 14 June 1996

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Cerdán-Vidal, A., Maurí-Aucejo, A., Llobat-Estellés, M. et al. Intersection point method (IPM): theoretical basis and application to spectrophotometric analyses. Fresenius J Anal Chem 357, 572–576 (1997). https://doi.org/10.1007/s002160050216

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  • DOI: https://doi.org/10.1007/s002160050216

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