EPA Method 507Mix #8, 100µg/ml in Aetone, 1ml

2,2',3,3',5,5'-Hexachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

2,4-DB, 100 µg/ml, Acetonitrile, 1ml

PBB-No. 1, 10 ng/µl, 10ml