Supercritical fluid extraction for the separation of organochlorine pesticides residue inAngelica sinensis

A method involving the simultaneous extraction and separation of 12 organochlorine pesticides (OCPs) from Angelicae sinensis was developed using supercritical fluid extraction (SFE). The pesticides in the study were α‐, β‐, γ‐ and δ‐benzene hexachloride, PCNB (pentachloro‐ nitrobenzene), PCA (pentachloroaniline), HEPT (heptachlor), MPCPS (methyl‐pentachlorophenyl sulfide), pp ′‐DDE [1,1‐dichloro‐2,2‐bis ( p ‐chlorophenyl) ethylene], op ′‐DDT...