Fenthion-sulfone, 100 µg/ml, Toluene, 1ml

2,2',3,5',6-Pentachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

2,6-Diethylaniline, 100 µg/ml, Methanol, 1ml

2,5-Dichlorobiphenyl ,100 µg/mL,isooctane,1mL,