Mass-Labelled PBB Solution/Mixture, 1.2ml, nonane

2,2',3,4,4',5,5',6-Octachloro-3'-methoxybiphenyl, 1.2ml x 50ug/ml, nonane

Thiofanox-sulfoxide, 100 µg/ml, Acetonitrile, 5m

N,N-Dimethylsulfamide, 100 µg/ml, Acetonitrile,