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Fig. 7 | Environmental Sciences Europe

Fig. 7

From: A European proposal for quality control and quality assurance of tandem mass spectral libraries

Fig. 7

The influence of the “1/3 rule” for ion trap spectra, exemplified with desipramine using a spectrum acquired on a LIT-Orbitrap instrument with CID and a QqTOF spectrum taken from the WRTMD. The black dot indicates the precursor mass isolated for MS/MS fragmentation (hollow dot). Due to the “low mass cut-off” observed on LIT-Orbitrap instruments, an abundant fragment ion is missing in the corresponding fragment ion mass spectrum

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