Theobromine, 100µg/ml in MeOH, 5ml

U{13C17}-Aflatoxin B2, 0.5µg/mL, Solvent-acetonitrile, Unit 1.2mL, # of units-1, Cas.no.

5000 µS/cm calibration solution (230mL)

Fenthion, 100 µg/ml, Ethyl acetate, 5ml