10 µg/mL of each analyte in iso-Octanealpha-HCH 4,4’-DDTbeta-HCH 4,4’-Methoxychlor gamma-HCH Aldrindelta-HCH Dieldrin epsilon-HCH Endrin2,4’-DDE Heptachlor4,4’-DDE Heptachlor epoxide (endo) (isomer A)2,4’-TDE Heptachlor epoxide (exo) (isomer B)4,4’-