Presence of lincomycin was
confirmed by the presence of two characteristic product ions at m/z 126.1 and 359.2 within a defined retention time window
from the precursor ion at m/z 407.2, whilst quantification was based on the relative ratio of the sum of the peak areas at m/z
126.1 and 359.2 for lincomycin to that of the internal standard (peaks at m/z 126.1 and 377.2) with reference to the respective ratios of the calibration standards.