Chiral quantification of D-, L-phenylglycine mixture using mass spectrometric kinetic method.

A novel mass spectrometric method is applied to rapid, accurate, quantitative analysis of chiral phenylglycine. Transition-metal-bound complex ions containing the chiral phenylglycine are generated by electrospray ionization mass spectrometry and subjected to collision-induced dissociation. The ratio of the two competitive dissociation rates is related to the enantiomeric composition of the mixture, allowing the determination of enantiomeric contamination in the intermediates.