Fonofos, 100 µg/ml, Acetonitrile, 1ml

Mono-n-octyl phthalate-3,4,5,6-d4, 100µg/ml in MeOH, 1ml

Phorate sulfone, 1000µg/ml in Acetonitrile, 1ml

2-Perfluorohexyl (13C2)ethanoic acid (13C2-6:2 FTCA), 50µg/ml in Isopropanol, 1,2ml