Method for separating long-chain nucleic acids

A method for the separation of long-chain nucleic acids from other substances in solutions containing nucleic acids and other materials, comprising:

• fixing long-chain nucleic acids in a nucleic acid-containing solution onto a porous matrix, said matrix being an anion exchanger, the porous matrix having a particle size of from about 15 to about 250 .mu.m and a pore diameter of about 100 to 2500 nm;
• washing the porous matrix to separate the other substances from the long-chain nucleic acids;
• and
• removing the fixed long-chain nucleic acids from the porous matrix.