Abstract: Particulate solid composite material for purifying nucleic acids containing magnetic nanoparticles embedded in a carrier matrix based on at least one polymer that is obtained by polyaddition of a) at least one isocyanate-reactive monomer A, selected from compounds containing at least two functional groups, each having at least one Zerewitinoff-reactive hydrogen atom, and in addition to these at least two functional groups, carry at least one anionic or potentially anionic residue, preferably selected from the group consisting of carboxylate, sulfonate or combinations thereof, with b) at least one polyisocyanate monomer B with the provisio that said polyaddition occurs in the presence of magnetic nanoparticles, is particularly suitable as carrier material for purification of nucleic acids. Said composite material is easy to prepare, is stable, and magnetic and has outstanding application properties in the bind-wash-elute purification of nucleic acids using magnetic separation.

Abstract: Particulate solid composite material for purifying nucleic acids containing magnetic nanoparticles embedded in a carrier matrix based on at least one polymer that is obtained by polyaddition of a) at least one isocyanate-reactive monomer A, selected from compounds containing at least two functional groups, each having at least one Zerewitinoff-reactive hydrogen atom, and in addition to these at least two functional groups, carry at least one anionic or potentially anionic residue, preferably selected from the group consisting of carboxylate, sulfonate or combinations thereof, with b) at least one polyisocyanate monomer B with the provisio that said polyaddition occurs in the presence of magnetic nanoparticles, is particularly suitable as carrier material for purification of nucleic acids. Said composite material is easy to prepare, is stable, and magnetic and has outstanding application properties in the bind-wash-elute purification of nucleic acids using magnetic separation.

Abstract: The invention concerns a separation matrix for purifying His-tag proteins by the introduction of alkyl substituents into a TED molecule, if applicable by the use of support materials having an average pore width >10−7 m (1000 Å).