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.
结果得到金霉样品相色谱图相色谱峰对应的一级质谱图。对谱图进行分析归纳,推测金霉样品中含有四环、差向异构四环和差向异构金霉杂质组分。