Degradation of Three Herbicides and Effect on Bacterial Communities under Combined Pollution.

The following criteria were used to filter the potential metabolites: (1) chromatographic peaks were detected in the treatment samples but not in the control; (2) the peak area showed an increasing trend or the peak area initially increased and subsequently decreased with the extension of the incubation time; (3) satisfactory peak shape; (4) the mass error of precursor ion <±5 ppm; (5) characteristic isotopic peaks; and (6) >2 matched common fragments. 2.7.

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