Magnetic-carboxymethyl cellulose nanofiber, oil palm empty fruit bunch, magnetic solid-phase extraction, organophosphorus pesticides, water samples, gas chromatography
Biomass, MPTMS, MSPE, organochlorine, organophosphorus, silica
oil palm frond-based silica, dispersive micro solid phase extraction, psidium guajava, liquid chromatography, forcefield theory, green assessment.