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Updated: Aug 29, 2026

High-throughput and Comprehensive Drug Surveillance Using Multisegment Injection-Capillary Electrophoresis-Mass Spectrometry
Published on: April 23, 2019
Three simultaneous dissolution profiles on a solid pharmaceutical formulation by a FIA manifold provided with a
E Vranic1, M Catalá Icardo, J Martínez Calatayud
1Department of Analytical Chemistry, University of Valencia, Moliner 50, 46100 Burjassot, Valencia, Spain.
Abstract:
This article deals with the simultaneous determination of three dissolution profiles in the same pharmaceutical formulation. The officially proposed procedure from the pharmacopoeias is adapted to the FIA methodology to obtain the officially recommended profile or "global profile", and two "individual" profiles, corresponding to dissolution rate of two different active principles present in the formulation; both drugs have overlapped UV-vis spectra. The simultaneous determination of several profiles is based on the derivative spectra and the zero crossing mathematical procedure for the "individual" profiles of an active principle; the "global" profile of the formulation is obtained from the order zero derivative. The empirical profiles were adjusted by regression analysis using the three-parameter (Higuchi equation) plot method which was selected as the most suitable. The analytical errors when the concentration of one drug is very small or very high are also checked.
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