4-Methoxy-2',5'-dichlorobiphenyl,100µg/ml in IO, 1ml

1,2,3,4,7,8-Hexachloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene

Formothion, 100 µg/ml, Ethyl acetate, 1ml

Ethanol standard in water,1.5g/L,water, 1.5mL