2,4'-DDD, 100 µg/ml, Acetonitrile, 5ml

Hexachloro-1,3-butadiene-13C4,100 µg/mL,isooctane,1mL,

Tin (Sn), 1000µg/ml in in 2%-HNO3 / 6%-HCl, 100ml

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