Imazamethabenz-methyl, 100 µg/ml, Acetonitrile,

Picric acid, 100 µg/ml, Acetonitrile, 10ml

1,2,3,4,6,7,9-Heptachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

Chlorodifluoromethane