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.
结果得素样品液相色谱图以及液相色谱峰对应的一级质谱图。对谱图进行分析归纳,推测素样品中含有四环素、差向异构四环素和差向异构素杂质组分。