The MagneSil system can selectively isolate PCR products that are more than 150-bp long from primers and primer -dimers. The technology can be used with a number of robotic workstations, including Beckman Coulter’s Biomek 2000 and FX Laboratory Automation Workstations. The procedure can also be carried out manually. Typical recovery is more than 80% for a 1-kb product with negligible carryover of primers or nucleotides.