EPA Method 507 Nitrogen Phosphorus Pesticides

4-Chloro-2-methylaniline, 1000µg/ml in MethChl, 1m

17 alpha(H),21ß(H)-(22RS)-Homohopane, 50µg/mL in Isooctane, 1ml

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