mass spectrum

1.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.

结果得到金霉素样相色图相色峰对应的一级质图。对图进行分析归纳,推测金霉素样有四环素、差向异构四环素和差向异构金霉素杂质组分。