A three‐phase solvent extraction system combined with deep eutectic solvent‐based dispersive liquid–liquid microextraction for extraction of some organochlorine pesticides in cocoa samples prior to gas chromatography with electron capture detection - Mardani, Asghar; Afshar Mogaddam, Mohammad Reza; Farajzadeh, Mir Ali; Mohebbi, Ali; Nemati, Mahboob; Torbati, Mohammadali (Journal of Separation Science, 2020)