Application of magnetite and silica–magnetite composites to the isolation of genomic DNA

Magnetite and silica–magnetite composites were used as adsorbents for the isolation of genomic DNA from maize kernels. Two methods are described for the preparation of silica–magnetite composites, both of which afford higher yields of genomic DNA than when using magnetite alone, or a commerically available kit. DNA isolated using silica–magnetite was suitable for use in further applications such as polymerase chain reaction amplification and enzyme digestion.