[13C12]Dibenzofuran, 1.2ml x 50ug/ml, toluene

VOC/Aromatic - Mix 18, 1000µg/ml in MeOH, 2ml

Methamidophos, 100 µg/ml, Toluene, 1ml

alpha-Endosulfan, 10.0 µg/ml, Ethyl acetate, 10m