Atrazine-d5 (ethyl-d5),1000 µg/mL,acetonitrile,1mL,

2,2',3,6'-Tetrachlorobiphenyl,100 µg/mL,isooctane,1mL,

2,2',3,4,4',6-Hexabromo[13C12]diphenyl ether, 1.2ml x 50ug/ml, nonane

Nitrofen, 100 µg/ml, Ethyl acetate, 1ml