Analysis of sonolytic degradation products of azo dye Orange G using liquid chromatography–diode array detection-mass spectrometry
作者： Meiqiang Cai , Micong Jin , Linda K. Weavers
DOI: 10.1016/J.ULTSONCH.2011.03.010
关键词:
摘要: In this paper, seven new sonolytic degradation products of Orange G were found and identified using powerful analytical techniques such as liquid chromatography-electrospray ionization mass spectrometry (LC-ESI-MS), tandem (MS/MS), chromatography with diode-array detection (LC-DAD). Each technique provided complementary information for the identification. order to resolve MS MS/MS spectra obtained, separation conditions optimized. Among them, was unambiguously based on its abundant [M-H](-) ion, [M+H](+) ultra-violet visible spectra, retention time, spectrometric analysis compared an authentic standard. The tentatively ions, spectrometry. neutral losses SO(2), SO(3), N(2) H(2)O which appear be characteristic negative ion mode observed. Based by-product identification, a possible multi-step scheme is proposed. results reveal that mechanism proceeds via reductive cleavage azo linkage, well intermolecular dehydration desulfonation due oxidizing hydroxyl radicals hydrogen radical.
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