Iohexol, 100 µg/ml in Acetonitrile, 5ml

(±)-trans-11-Nor-9-carboxy-delta-9-THC, 1000µg/ml in MeOH, 1ml

2-Methylnonane, 1000µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-1, Cas.no. 871-83-0

pH 2.0 Standard @ 25°C