EPA Method 531.1 - Analytes Mixture

beta-Endosulfan, 100 µg/ml, Methanol, 1ml

3-Ethylthiophenol, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 62154-77-2

Monodesmethyl Isoproturon, 250mg