Carbon tetrachloride, 1000µg/ml in MeOH, 1ml

Trigonelline-d3 (methyl-d3)

2-Chloro[13C12]biphenyl, 50.0µg/mL in Nonane/5% toluene, 1,2ml

Trichloromethane, 100 µg/ml, Methanol, 1ml