Σpider diagram: a universal and versatile approach for system comparison and classification: application to solvent properties

Journal of Chromatography. a
Eric Lesellier

Abstract

Classification methods based on physico-chemical properties are very useful in analytical chemistry, both for extraction and separation processes. Depending on the number of parameters, several classification approaches can be used: by plotting two- or three-dimensional maps (triangles, cubes, spheres); by calculating comparison values for one system with reference to another one, i.e. the ranking factor F, or the Neue selectivity difference s(2); or with chemometric methods (principal component analysis-PCA or hierarchical cluster analysis-HCA). All these methods display advantages and drawbacks: some of them are limited by the number of studied parameters (e.g. three for triangle or sphere plots); others require a new calculation when changing the reference point (F; s(2)), while for chemometric methods (PCA, HCA), the relationships between the clusters and the physico-chemical properties are not always easily understandable. From previous studies performed in supercritical fluid chromatography for stationary phase classification on the basis of linear solvation energy relationships (LSER) including five parameters, we developed a classification map called the Σpider diagram. This diagram allows plotting in a two-dimensional ...Continue Reading

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Citations

Aug 25, 2016·Journal of Chromatography. a·Nolwenn PrachePierre Chaminade
Dec 15, 2020·Journal of Chromatography. a·Thibault LefebvreEric Lesellier
Jan 22, 2021·Journal of Chromatography. a·Abhijit Tarafder, Larry Miller
Aug 19, 2020·ACS Applied Materials & Interfaces·Aadarash ZiaKristian Kempe

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