The chemical isolation of tin from alloys containing titanium, antimony, vanadium and other elements can be accomplished (A. M. Leblond, R. Boulin, Dosage de l'???tain dans les m???taux ferreux, M???thode spectrophotom???trique ??? la ph???nylfluorone, Chim. analyt., 50, 171-177 (1968)).