Parathion-methyl, 100µg/mL in Acetonitrile, 1ml

2,2',3,3',4,4',6,6'-Octabromodiphenyl ether, 1.2ml x 50ug/ml, toluene

Metformin-d6 hydrochloride (dimethyl-d6),100 µg/mL,MeOH,1mL,

2,2',6-Trichloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane