The first method Alizadeh Fard and Barkdoll tested was to use polymer - coated magnetic nanoparticles to
adsorb Tonalide (used to mask odors and often found in detergents), Bisphenol - A (better known as BPA, used to make plastics clear and tough), Triclosan (an anti-bacterial and anti-fungal agent used in cleaning products that is now banned), Metolachlor (an herbicide),
Ketoprofen (an anti-inflammatory) and Estriol (an estrogen supplement).