File Name : figure si1_600dpi.tif Caption : figure si1. transition concurrency across gc gradient of dmrm method (generated by masshunter gc/ms acquisition). File Name : figure si2_600dpi.tif Caption : percent bias (average ± sd, n=5) for pacs in srm 1944 determined using dmrm and conventional mrm with the acceptable limits (±30%, certified value was denoted by *). File Name : figure si3_600dpi.tif Caption : percent bias (average ± sd, n=5) for pacs in bs-317 determing using dmrm and conventional mrm with the acceptable limits (±30%, certified value was denoted by *). File Name : figure si4_600dpi.tif Caption : percent bias (average ± sd, n=5) for pacs in our in-house egg reference material determined using dmrm and convention mrm with acceptable limits (±30%).