Magnetic polystyrene particles  

• are monodisperse particles which consist of magnetite around an organic matrix of a styrene-maleic acid-copolymer,

• are finally coated with a polymer layer for the encapsulation of magnetite and the introduction of chemical functionalities,

• can easily be separated with conventional permanent magnets,

• are provided as standard products in the size range of 2 to 12 microns,

• are designed with the surface functionalities NH₂, PEG-NH₂ and PEG-COOH for the covalent binding of proteins, antibodies or other molecules,

• are available with covalently bound proteins (avidin, streptavidin, protein A, albumin) or other polymers (polyethylene imin (PEI)).