电晕放电等离子体对头孢唑林钠的降解
Degradation of cefazolin sodium by corona discharge technology
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摘要:
为探究电晕放电等离子体对头孢唑林钠(cefazolin sodium,CFZ)的降解过程及产物,考察了不同因素对CFZ降解的影响,并结合光谱学及质谱分析推断出了CFZ降解过程中的部分中间产物及降解途径.结果表明,电晕放电等离子对CFZ有着良好的降解效能,且降解过程基本符合一级反应动力学,CFZ初始浓度、pH及载气条件均对反应存在影响.光谱学表明CFA被矿化NO3-、SO42-和CO32-等小分子无机离子.对CFZ的降解过程中降解副产物分析可知,电晕放电过程中CFZ主要有3种降解途径分别是噻二唑基团脱硫降解、头孢母核发生分子间内脂化和四氮唑开环矿化.
Abstract:To investigate the degradation and products of cefazolin sodium (CFZ) induced by corona discharge plasma technology, the effects of different factors on the degradation of CFZ were investigated, and the spectroscopy and mass spectrometry analysis were used to explore the degradation pathway of CFZ and the related intermediates. The results showed that the corona discharge plasma technology could significantly enhance the degradation of CFZ, which corresponded to a first-order reaction. The initial concentration of CFZ,pH and the carrier air influenced the reaction rates. Meanwhile, spectroscopy showed that CFZ was eventually degrader into small molecule inorganic ions including NO3-, SO42- and CO32-. Degradation of the by-products in the reaction process showed that there were three main degradation pathways of CFZ in corona discharge. The transformation mechanism of CFZ consisted mainly of thiadiazole rings degradation by desulfuration, intermolecular lipidation of cephalosporin nuclei and tetrazolium ring opening.
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Key words:
- corona discharge /
- cefazolin sodium /
- degradation kinetics /
- degradation product /
- degradation pathway
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