2,3,3',4,4',6-Hexachlorobiphenyl (158)

(±)-Atenolol-d7 (N-isopropyl-d7),100 µg/mL,MeOH,1mL,

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

Fenthion-oxon-sulfone, 10µg/mL in Acetonitrile, 1ml