Theophylline, 100μg/mL in Acetonitrile, 1ml

Phosphate flame retardants mix, 15μg/mL in IO, 1ml

Dibenz[a,h]anthracene-d14, 100µg/mL in Toluene, 1ml

N-(4-chloro[13C6]phenyl)-N'-(3,4-dichloro[13C6]phenyl)[13C]urea , 1.2ml x 50ug/ml, methanol