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[目的]研究不同因素对吩胺霉素的光化学降解的影响。[方法]将不同溶液配制的吩胺霉素标准溶液,置于氙灯光解恒温试验箱进行光照试验,固定时间取样,反应液使用HPLC检测。[结果]初始质量分数、pH值、有机溶剂、光源对吩胺霉素的光化学降解均有重要影响。超纯水中,吩胺霉素光解速率随初始质量分数增大而降低。pH值缓冲溶剂中,光解速率随pH值升高而降低。有机溶剂中的紫外光解速率为甲醇>正己烷>丙酮>乙腈。甲醇、正己烷、超纯水、乙腈、丙酮中吩胺霉素的紫外与氙灯光解速率不同,其中丙酮紫外照射下起淬灭作用,氙灯照射下起光敏作用。[结论]随着环境改变吩胺霉素的光解规律发生变化,试验方法简单科学,为吩胺霉素在环境中的迁移转化规律提供可靠依据。
[Objective] The research aimed to study the influence of different factors on the photochemical degradation of thymomycin. [Method] The standard solution of different degree of preparation of the penicillin, placed in xenon lamp light thermostat chamber light test, a fixed time sampling, the reaction solution was detected by HPLC. [Result] The initial mass fraction, pH value, organic solvent and light source all had important influence on the photochemical degradation of. In ultrapure water, the photochemical degradation rate of penicillin decreased with the increase of initial mass fraction. pH buffer solvent, photolysis rate decreases with increasing pH value. The rate of ultraviolet photolysis in organic solvents was methanol> n-hexane> acetone> acetonitrile. Methyl alcohol, n-hexane, ultrapure water, acetonitrile, acetone, the UV light and xenon light photolysis rates are different, including acetone UV quenching from the role of xenon lamp irradiation play a photosensitive role. [Conclusion] The test method was simple and scientific with the change of the photochemical reaction of the environmental change of the penicillin, which provided a reliable basis for the migration and transformation of the penicillin in the environment.