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Pure Appl. Chem., Vol. 68, No. 8, pp. 1591-1595, 1996

ANALYTICAL CHEMISTRY DIVISION

COMMISSION ON SEPARATION METHODS IN ANALYTICAL CHEMISTRY

Nomenclature for Non-Linear Chromatography

(IUPAC Recommendations 1996)

J.Å. Jönsson

Abstract: This report summarizes and comments terms and symbols used for the description of non-linear chromatography.

In the IUPAC recommendations Nomenclature for Chromatography [1], the conditions of linear chroma-togra-phy are tacitly assumed. In all versions of chromatogra-phy, however, non-linear effects are common. These are seen as concentration-dependent retention times and asymmetric (e.g. tailing or fronting) peaks. Asymmetric peaks can result from a number of other causes as well, i.e. large extra-column volumes. In many applications, non-linear effects are disadvantageous as they decrease peak resolution and disturb quantitative evaluation. However, in prepara-tive chromatography, heavy overloading is employed in order to increase material throughput, leading to prominent non-linear effects. A comprehensive text on non-linear chromatography has recently been published [2]. In this paper, some of the concepts and terms used for non-linear chromatog-raphy are described. It is to be read as a complement to the Nomenclature for Chromatography (CN)[1], to which numerous references are given.

[1] Recommendations for Nomenclature for Chromatography. Pure Appl. Chem. 65, 819-872 (1993).
[2] G. Guiochon, S. Golshan Shirazi and A. M. Katti, Fundamentals of Preparative and Non-linear Chromatography, Academic Press, Inc. Boston (1994)

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