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Collisional activation mass spectra of M −. ions of azo dyes containing 2‐naphthol
Author(s) -
Brumley W. C.,
Brilis G. M.,
Calvey R. J.,
Sphon J. A.
Publication year - 1989
Publication title -
biomedical and environmental mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0887-6134
DOI - 10.1002/bms.1200180606
Subject(s) - chemistry , ion , mass spectrum , substituent , chloroform , mass spectrometry , decomposition , analytical chemistry (journal) , 1 naphthol , 2 naphthol , photochemistry , medicinal chemistry , chromatography , organic chemistry
Collisionally activated decomposition mass spectra of M −. ions of azo dyes are presented. The compounds are of general structure Ar(1)NNAr(2), where Ar(1) is substituted phenyl and Ar(2) is 2‐naphthol. Characteristic fragment ions observed include m/z 157, which corresponds to the 2‐naphthol substituent with cleavage of the NN bond represented as [Ar(2) – N] −. . Ion of general structure [Ar(1)– NH] − are also observed. Parent ion scans of m/z 157 provide a potential screening technique for 2‐naphthol‐containing axo dyes. Specific results are reported for the chloroform extract of FD&C Red #8, and capillary gas chromatographic introduction is compared with direct exposure probe introduction for the identification of dyes.