WS Trace Elements #1

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

Benzobicyclon, 10.0 µg/ml, Acetonitrile, 10ml

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