Mix 33, 10.0 µg/ml, Acetonitrile, 10ml

2,4,4'-Trichlorobiphenyl-2',3',5',6'-d4, 100 µg/mL in Isooctane, 1mL

beta-Endosulfan-d4 (1,1,5,5-d4),100 µg/mL,n-nonane,1mL,

Propylthiouracil-d5, 2,5mg