Theophylline, 100µg/ml in MeOH, 5ml

2,2',3,3',4,5',6,6'-Octachlorobiphenyl (201)

GC-IRMS Standards (C25 (?13C: -28.21); C30 (?13C: -28.60); C36 (?13C: -26.15)), 150µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-5, Cas.no.

Acetamiprid-N-desmethyl, 10.0 µg/ml, Acetonitrile