PCB No. 166, 10 ng/µl, 10ml

κ-1,2,5,6,9,10-Hexabromocyclododecane, 1.2ml x 50ug/ml, toluene

2,4-Dibromophenol, 100 µg/ml, Methanol, 1ml

5-Nitro-o-toluidine