Ammonia in the Ion-Source. III. Clustering With N-Oxides, Sulfoxides and Sulfones

Under positive ion chemical ionization conditions, with ammonia as reagent gas at relatively low pressure, N-oxides, sulfoxides and sulfones form clusters with a proton and one or more ammonia molecules; these clusters can be represented as [M+H]+, [M+NH4]+, [M+N2H7]+, [2M+H]+ and [2M+NH4]+. The unimolecular decomposition of the clusters can be followed by the accompanying metastable peaks.