EPA Method 502/524 Fortification Solution

Sodium p-n-tetradecylbenzenesulfonate, 100µg/mL, Solvent-methanol/water (50/50), Unit 1mL, # of units-1, Cas.no. 1797-33-7

4-n-Nonylphenol monoethoxylate, 1000µg/ml in Isooctane, 1ml

1,2,3,4,7,8,9-Heptachlorodibenzofuran,50 µg/mL,n-nonane,1mL