Chlormequat-1,1,2,2-d4 chloride, 1000µg/ml in MeOH, 1ml

Acetochlor ESA sodium salt, 100ug/ml in MeOH, 1ml

Benzo[a]pyrene, 100 µg/ml, Acetonitrile, 1ml

Mix of deuterated PCBs (28,52,101), 100µg/ml in Nonane, 1ml