title: Predicting ESI/MS Signal Change for Anions in Different Solvents.
abstract: LC/ESI/MS is a technique widely used for qualitative and quantitative analysis in various fields. However, quantification is currently possible only for compounds for which the standard substances are available, as the ionization efficiency of different compounds in ESI source differs by orders of magnitude. In this paper we present an approach for quantitative LC/ESI/MS analysis without standard substances. This approach relies on accurately predicting the ionization efficiencies in ESI source based on a model, which uses physicochemical parameters of analytes. Furthermore, the model has been made transferable between different mobile phases and instrument setups by using a suitable set of calibration compounds. This approach has been validated both in flow injection and chromatographic mode with gradient elution.
authors.affiliation: University of Tartu , Institute of Chemistry, Ravila 14a, Tartu 50411, Estonia.|Technion - Israel Institute of Technology , Schulich Faculty of Chemistry, Technion City, Haifa 3200008, Israel.
authors.forename: Anneli
authors.identifier: 0000-0001-9725-3351
authors.initials: A
authors.lastname: Kruve
authors.affiliation: University of Tartu , Institute of Chemistry, Ravila 14a, Tartu 50411, Estonia.
authors.forename: Karl
authors.initials: K
authors.lastname: Kaupmees