Mass-Labelled PCDD Solution/Mixture, 1.2ml, nonane

1,1,1,2-Tetrafluoroethane, 20mg/mL in MeOH, 1ml

1-Perfluoropentyl ethanol (5:2 secondary), 1.2ml x 50ug/ml, methanol

EPA Method 525.2 Pesticide Level 4