13C3-Caffeine, 100 µg/ml, Methanol, 1ml

1-Perfluoroheptyl ethanol (7:2 secondary), 1.2ml x 50ug/ml, methanol

Phenol-2,3,4,5,6-d5, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-5, Cas.no. 4165-62-2

1,2,4-Trichlorobenzene, 10 µg/ml, Acetonitrile,