Mono-(2-ethyl-5-carboxypentyl)phthalate-13C2, 1,2m

2,2',3,4,5,5'-Hexachloro[13C12]diphenyl ether, 1.2ml x 50ug/ml, nonane

Isocarbophos, 10.0 µg/ml, Ethyl acetate, 10ml

2,3,7,8-Tetrachlorodibenzofuran,50 µg/mL,n-nonane,1mL,