Record Display for the EPA National Library Catalog


Main Title Collisional Activation Mass Spectra of M(1-.) Ions of Azo Dyes Containing 2-Naphthol.
Author Brumley, W. C. ; Brilis, G. M. ; Calvey, R. J. ; Sphon, J. A. ;
CORP Author Environmental Monitoring Systems Lab., Las Vegas, NV. ;Food and Drug Administration, Washington, DC. Center for Food Safety and Applied Nutrition.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/031;
Stock Number PB90-100983
Additional Subjects Azo dyes ; Mass spectroscopy ; Gas chromatography ; Decomposition ; Food additives ; Reprints ; Ion collisions ; Biological effects ; 2-Naphthal
Library Call Number Additional Info Location Last
NTIS  PB90-100983 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 11p
Collisionally activated decomposition mass spectra of M- ions of azo dyes are presented. The compounds are of general structure Ar(1)-N=N-Ar(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 -N=N- bond represented as (AR(2) -N)-. Ions 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 azo dyes. Specific results are reported for the chloroform extract of FD&C Red No.8, and capillary gas chromatographic introduction is compared with direct exposure probe introduction for the identification of dyes. (Copyright 1988 by John Wiley & Sons, Ltd.)