Extended Calibration/Low Level Solution, 200ul, nonane

2,2',3,3',5,6'-Hexachlorobiphenyl,100 µg/mL,isooctane,1mL,

Ethofumesate, 100 µg/ml, Ethyl acetate, 5ml

Ketoconazole, 1000μg/ml in MeOH, 1ml