[Identification and determination of XAX-M in fats and fatty tissues]

XAX-M preparations with their main component ETDQ (1,1-Bis-(2,2,4-trimethyl-1,2-dihydroquinol-6-yl)-ethane) are used as antioxidizing agents for stabilization of mixed feeds. Identification and determination of XAX-M in fats and fatty tissues of slaughter animals succeed after an improved selective concentration of ETDQ already with much lower contents then by the procedures known up to now. Preliminary investigations of the occurrence of XAX-M-residues in human fatty tissues yielded negative results with an inferior detection limit of 0.005 mg/kg.