Record Display for the EPA National Library Catalog


Main Title Particle Beam Liquid Chromatography-Electron Impact Mass Spectrometry of Dyes.
Author Yinon, J. ; Jones, T. L. ; Betowski, L. D. ;
CORP Author Environmental Monitoring Systems Lab., Las Vegas, NV.
Publisher cNov 89
Year Published 1989
Report Number EPA/600/J-89/320;
Stock Number PB90-198680
Additional Subjects Dyes ; Chemical analysis ; Mass spectroscopy ; Spectrum analysis ; Azo dyes ; Performance evaluation ; Chemical bonds ; Experimental design ; Reprints ; Environmental monitoring ; Liquid chromatography ; Electron impact ; High performance liquid chromatography
Library Call Number Additional Info Location Last
NTIS  PB90-198680 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12p
Dyestuffs are of major environmental interest because of their widespread use as colorants in a variety of products, such as textiles, paper, leather, gasoline and foodstuffs. Synthetic intermediates, byproducts and degradation products of these dyes could be potential health hazards owing to their toxicity and/or carcinogenicity. A liquid chromatograph was interfaced with a triple quadrupole mass spectrometer by means of a particle beam-type interface. The system was used for the analysis and characterization by electron impact mass spectra of a series of commercial dyes. The pure dyes were separated from their impurities with a reversed-phase C18 column using methanol-water as the mobile phase. Detection limits were determined using the system as a single quadrupole mass spectrometer. Sensitivity for dyes was found to be two to three orders of magnitude worse than with thermospray ionization using a wire repeller. Characterization of the azo dyes could be achieved by observing typical fragment ions formed by cleavage of the N-C and C-N bond on either side of the azo linkage and/or cleavage of the N=N double bond with transfer of two hydrogen atoms to form an amine. (Copyright (c) 1989 Elsevier Science Publishers B.V.)