D8-4,4'-DDT, 100 µg/ml, Acetone, 1ml

PCB No. 184, 100µg/ml in Isooctane, 1ml

Phthalic acid ester - Mix 7, 1000g/ml in IO, 5ml

N-(4-chloro[13C6]phenyl)-N'-(3,4-dichloro[13C6]phenyl)[13C]urea , 1.2ml x 50ug/ml, methanol