Modelling of cations retention in ion chromatography with methanesulfonic acid as eluent

Author:

Todorovic Zaklina1ORCID,Rajakovic Ljubinka2,Onjia Antonije1ORCID

Affiliation:

1. Vinča Institute of Nuclear Sciences, Belgrade

2. Faculty of Technology and Metallurgy, Belgrade

Abstract

The two retention models, the linear solvent strength model (LSS) and the quadratic relationship, in addition to artificial neural network (ANN) approach, were compared in their ability to predict the retention behaviour of common cations (Li, Na, NH4, K, Mg, and Ca) in isocratic ion chromatography using the methanesulfonic acid (MSA) eluent. Over wide variations in the MSA concentration, the quadratic model shows a quite good prediction power. LSS can be used only for monovalent cations and in the proximity of the experimental design point. ANN fails to predict the retention for the data not included in the training set. To find the optimal conditions in the experimental design, the normalized resolution product as a chromatographic objective function was employed. The optimum MSA concentration in the eluent on a Dionex CS12 column was found to be 18 mM, with the total analysis time of less than 10 min.

Funder

Ministry of Education, Science and Technological Development of the Republic of Serbia

Publisher

National Library of Serbia

Subject

General Chemical Engineering,General Chemistry

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