An attempt to distinguish between the components of a mixture of isomeric fragment ions |
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Authors: | Gyrgy Bujts Mikls Hollsi Zsuzsa Majer |
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Institution: | György Bujtás,Miklós Hollósi,Zsuzsa Majer |
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Abstract: | The C7H10NO3]+ ion in the normal mass spectrum of 2-ethoxycarbonyl-5-oxo-2-pyrrolidinepropanoic acid was shown to correspond to a mixture of two isomeric structures. By decreasing the ionizing electron energy, the one containing a CH2CH2COOH group becomes dominant. The proportion of the concentrations of the two isomeric ions was calculated by comparing their daughter ion spectra (obtained by linked scan at constant B/E) with the analogous spectra of a derivative partially labelled by deuterium at the carboxyl and amide groups. |
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