Mass-Labelled PCB Recovery Standard, 1.2ml, nonane

6-Nitrobenzo[a]pyrene-d11, 100µg/ml in Toluene, 1ml

ISO 8165-2 Internal Control Stock Solution 2 S-4356 2,5-Dibromophenol [28165-52-8] 2470,6, 10 µg/mL in methanol, 5ml

Desmetryn, 100 µg/ml, Acetonitrile, 5ml