EPA Method 601 Internal Standard

Glyoxal mono-2,4-dinitrophenylhydrazone, 100µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 13059-68-2

alpha-HCH-d6, 10µg/ml in Cyclohexane, 5ml

n-Eicosane, ?13C: -33.06, 150ug/ml, Solvent-cyclohexane, Unit 1mL, # of units-10, Cas.no. 112-95-8