EPA Method 625 Base/Neutrals Mix #1

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

5ß(H)-Cholestan-3ß-ol, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 360-68-9

Ethanol