Monocrotophos, 100 µg/ml, Ethyl acetate, 5ml

EPA Method 502/524 Fortification Solution

Sodium 1H,1H,2H,2H-perfluorooctane sulfonate (6:2), 50µg/ml in MeOH, 1,2ml

4.4'-DDE (13C12), 100µg/ml in n-Nonane, 1,2ml