A Study of Alkali Halide Triple Ions by Fast Atom Bombardment and Collisionally Activated Dissociation Mass Spectrometry

Abstract

This work represents a more precise study of the characteristics of A₁XA₂⁺ ions in the gas phase, which can be formed in concentrated electrolyte solutions. In order to obtain the parent ions A₁XA₂⁺, a simple system was used, a mixture of two-alkali halide salts in an aqueous solution. In this system, A₁⁺, A₂⁺ are Li⁺, Na⁺, K⁺, Rb⁺, Cs⁺ and X^- is F^-, Cl^-, Br^-, I^-, respectively. Utilizing Fast Atom Bombardment (FABMS) measurement methods, an A₁XA₂⁺ ion type in the mass spectra was obtained, and from this resulting spectrum, an ion was selected to be used as a precursor ion for the next stage. In this way, the Collisionally Activated Dissociation (CAD) spectra were obtained and the product ions identified.