RESULTS The chlortetracycline's epimer, tetracycline and its epimer, as impurities in chlortetracycline have been determined by the liquid chromatogram and its first order mass spectrum.
结果

霉素样品液相色谱图以及液相色谱峰
应的一级质谱图。
谱图进行分析归纳,

霉素样品中含有四环素、差向异构四环素和差向异构
霉素杂质组分。




些宝贵的信息来自对E环中超过300颗冰粒的宇宙尘埃分析仪质


