a,a,a-Trifluorotoluene, 20mg/ml in MeOH, 1ml

Metconazole, 10 µg/ml, Ethyl acetate, 10ml

1,2,3,4,6,9-Hexachloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene

Method 525.2 Solution B