S421, 100 µg/ml, Ethyl acetate, 5ml

2,2',4,4'-Tetrabromo-6-methoxy[13C12]diphenyl ether, 1.2ml x 50ug/ml, nonane

Atrazine-2-hydroxy, 10.0 µg/ml, Methanol, 10ml

1,2,4,6,8-Pentachlorodibenzofuran, 1.2ml x 50ug/ml, nonane