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

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.

This is a preview of subscription content, access via your institution.

Author information

Affiliations

Authors

Additional information

Received: 11 April 1996 / Revised: 10 June 1996 / Accepted: 14 June 1996

Rights and permissions

Reprints and Permissions

About this article

Cite this article

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

Download citation

Keywords

  • Caffeine
  • Intersection Point
  • Theoretical Basis
  • Point Method
  • Spectrophotometric Analysis