Ethanol standard in serum,0.8g/L,serum, 1.5mL

2,2',3,3',4,5,5',6-Octabromodiphenyl ether, 1.2ml x 50ug/ml, toluene

Ametryn, 100 µg/ml, Methanol, 1ml

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