Fragment-molecule adduct ion formation i
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Elizabeth P. Burrows
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Article
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1991
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John Wiley and Sons
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English
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Mass spectra of seven related N-heterocyclics, introduced by direct exposure probe, were determined in electron impact (EI) and positive-and negative-ion chemical ionization (PCI and NCI) modes. Proton adducts were the predominant molecular ion species in the EI and PCI modes. In addition, a variety