beta-HCH, 100 µg/ml, Ethyl acetate, 5ml

Heptachlor-exo-epoxide, 10 µg/ml, Acetonitrile,

QC Standard 5

Sodium bis(1H,1H,2H,2H-[1,2-13C2]perfluorodecyl)phosphate, 50µg/ml in MeOH, 1,2ml