Uncoated Magnetic Estapor® Microspheres

With more than 35 years of experience, Estapor® offers the most knowledge in the microspheres market. With our unique product portfolio of SuperParamagnetic Microspheres, you can choose the size, ferric percentage and surface of our microspheres.

Estapor® is a pioneer in production capacity. We can produce 6 kg of magnetic materials and 20 kg of non-magnetic materials. Estapor® is ISO 9001:2000 and 14001 certified. We are committed to providing the highest quality products worldwide.

If you are looking for something new in terms of particle size, density, ferrite content, color and have not found it, Estapor® provides custom development. Our experience in microsphere development allows our R&D department to quickly and inexpensively develop custom products.

Carboxy-Modified Uncoated Magnetic Microspheres

The introduction of highly polar or ionisable chemical groups increases latex stability, and also facilitates covalent coupling of proteins to the microspheres surface. The groups – COOH are produced by copolymerisation of the corresponding functional monomers. For carboxylated magnetic latexes, cleaning is achieved by 4 or 5 magnetic separations and is much faster. For a pH below 6 it is advisable to add TWEEN 20 or CEMULSOL NP 30 (0.5 to 1 g/L).

Amino-Modified Uncoated Magnetic Microspheres

Highly polar or ionisable chemical groups increase latex stability and facilitate covalent coupling of proteins to the microspheres surface. The groups – NH2 are produced by copolymerisation of the corresponding functional monomers.

Hydrophobic Uncoated Magnetic Microspheres

Our magnetic microspheres reference MS-070/40, characterized by a very innovative surface, are mainly dedicated to hydrophobic or passive immobilization of biomolecules (polyclonal, monoclonal antibodies or proteins) onto their surface.

With a mean size of 1µm and up to 50% of ferrite, those original and innovative magnetic microspheres offer a large surface area and a fast magnetic response. Applications: ImmunoAssays, Cell sorting, Bacteria concentration.