Method for screening 62 antibacterial drugs in livestock excrement

The invention discloses a method for screening 62 antibacterial drugs in livestock excrement. The method specifically comprises the following steps: (1) preparing a standard working solution; (2) preprocessing a sample to be detected before analyzing; (3) drawing a substrate matching standard curve; (4) performing mass spectrometric analysis on the sample containing a certain amount of drugs in step (3) so as to obtain standard molecular ions and two characteristic ions of each drug; wherein the two characteristic ions include qualitative ions and quantitative ions; (5) performing qualitative analysis; (6) performing quantitative analysis. The screening method is precise, accurate, and high in sensitivity; the technical support is provided to detect the residues of antibiotics in a livestock farm and the surrounding environment and evaluate the potential risk and the influence of the antibiotics residual in the excrement to the environment. Therefore, the method is high in social benefit. 本发明公开了种畜禽排泄物中62种抗菌药物