2,2',6,6'-Tetrachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

(±)-Vanillomandelic acid-d3,100 µg/mL,MeOH,1mL,

(+)-Catechin, 500mg

2,2',3,3',4,4',6,6'-Octabromodiphenyl ether,50 µg/mL,isooctane,1mL