Oct 25, 2006· Nucleic acid separation using magnetic beads is described in (Alderton et al. 1992) and in WO/1991/012079 as well as in US 5,523,231 (Amersham). These magnetic beads are able to absorb the nucleic acid after a salt-ethanol precipitation. The approaches are not nucleic-acid-specific, i.e. the magnetic beads adsorb other bio-substances in parallel.