Brumley W C, Brilis G M, Calvey R J, Sphon J A
US Environmental Protection Agency, Environmental Monitoring Systems Laboratory, Las Vegas, Nevada 89193.
Biomed Environ Mass Spectrom. 1989 Jun;18(6):394-400. doi: 10.1002/bms.1200180606.
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]-.. 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.
本文给出了偶氮染料M-离子的碰撞激活分解质谱图。这些化合物具有通式Ar(1)--N = N--Ar(2)，其中Ar(1)为取代苯基，Ar(2)为2-萘酚。观察到的特征碎片离子包括m/z 157，它对应于2-萘酚取代基，同时发生了--N = N--键的断裂，可表示为[Ar(2)--N]-.. 还观察到了通式为[Ar(1)--NH]-的离子。对m/z 157进行母离子扫描可为含2-萘酚的偶氮染料提供一种潜在的筛选技术。报告了FD&C红#8氯仿提取物的具体结果，并比较了毛细管气相色谱进样和直接暴露探针进样用于染料鉴定的情况。
