化学
质谱法
色谱法
水溶液
气相色谱-质谱法
电喷雾电离
气相色谱法
对苯二酚
高效液相色谱法
矿化(土壤科学)
有机化学
氮气
作者
Ilza Dalmázio,Tânia Maria de Almeida Alves,Rodinei Augusti
标识
DOI:10.1590/s0103-50532008000100013
摘要
The advanced oxidation of paracetamol (1) promoted by TiO2/UV system in aqueous medium was investigated. Continuous monitoring by several techniques, such as UV-Vis spectroscopy, HPLC (high performance liquid chromatography), TOC (total organic carbon), and ESI-MS (electrospray ionization mass spectrometry), revealed that whereas the removal of paracetamol was highly efficient under these conditions, its mineralization was not likewise accomplished. GC-MS (gas chromatography-mass spectrometry) analysis showed that hydroquinone, aliphatic carboxylic acids, monohydroxy and dihydroxy paracetamol were the main products formed as a result of such degradation process. Based on these results, a reaction route for the degradation of paracetamol induced by the TiO2/UV system was suggested. Fragmentation pathways, as obtained from the mass spectra data, were also proposed for the trimethylsilyl (TMS) derivatives of monohydroxy and dihydroxy paracetamol.
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