4,4'-DDE, 100 µg/ml, Toluene, 5ml

rac 3,4-Dihydroxyphenylethylene Glycol, 10mg

n-Octadecane, ?13C: -30.71, 150µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-5, Cas.no. 593-45-3

EPA Method 525 Spike B