PCB No. 157, 10µg/ml in Isooctane, 10ml

4,4'-DDD, 100 µg/ml, Toluene, 5ml

Perfluoro-n-octadecanoic acid, 50µg/ml in MeOH, 1,2ml

Indeno(1,2,3-cd)pyrene, 100µg/ml in Acetonitrile, 1ml