Nicosulfuron, 100mg

Hexavalent Chromium (Cr 6+)

2-Perfluorohexyl-[1,1-2H2]-[1,2-13C2]-ethanol (6:2), 50µg/ml in MeOH, 1,2ml

1,2,4,7,9-Pentachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene