Difenoxuron,100 µg/mL,MeOH,1mL,

Ethanol standard in serum,2.0g/L,serum, 3.0mL

Chlorpyrifos, 100 µg/ml, Toluene, 1ml

Sodium(1H,1H,2H,2H-perfluorooctyl-1H,1H,2H,2H-perfluorodecyl)phosphate, 50µg/ml in MeOH, 1,2ml