PCB 52-d3, 10µg/ml in Cyclohexane, 5ml

n-Eicosane-d42, 1000µg/ml in IO, 1ml

1,2,3,5-Tetrachloro[13C6]benzene, 1.2ml x 100ug/ml, isooctane

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