Collisional activation mass spectra of M−. ions of azo dyes containing 2-naphthol

✍ Scribed by W. C. Brumley; G. M. Brilis; R. J. Calvey; J. A. Sphon

• Publisher: John Wiley and Sons
• Year: 1989
• Tongue: English
• Weight: 519 KB
• Volume: 18
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/bms.1200180606

✦ Synopsis

Collisionally activated decomposition mass spectra of M-' ions of azo dyes are presented. The compounds are of general structure Ar(l)-N=N-Ar(2), where Ar(1) is substituted phenyl and Ar(2) is 2-naphthol. Characteristic fragment ions observed include m/r 157, which corresponds to the 2-naphthol substituent with cleavage of ihe -N=N-bond represented as (Ar(2) -NI-'. Ion of general structure [Ar(l) -NHJ-are also observed. Parent ion scans of m/z 157 provide a potential screening technique for 2-naphthoi-containing axo dyes. Specific results are reported for the chioroform extract of FD&C Red #8, and capillary gas chromatographic introduction is compared with direct exposure probe introduction for the identification of dyes.