Mephosfolan, 100 µg/ml, Cyclohexane, 5ml

Perfluoro-n-octanoic acid, 50µg/ml in MeOH, 1,2ml

Alachlor D13 (2,6-diethylphenyl D13), 100 ng/µl, 1.1ml

EPA Method 624 Internal / Surrogate Standard