Patent ID: 7737268

Claim:
A method of recovering nucleic acids from a sample solution, said method comprising: contacting a first sample solution comprising ribonucleic acid (RNA) and double stranded deoxyribonucleic acid (DNA) with quartz glass wool in a first binding reaction, wherein the first binding reaction results in binding of said DNA to said quartz glass wool thereby creating a second sample solution comprising the RNA, wherein during the first binding reaction the first sample solution has a pH value of 6.0 or higher but 6.9 or lower, a temperature of 50° C. or higher but 70° C. or lower and a magnesium ion concentration of 100 mM or higher but 250 mM or lower; contacting the second sample solution with quartz glass wool in a second binding reaction, wherein the second binding reaction results in the RNA binding to said quartz glass wool in the second sample solution, wherein during the second binding reaction the second sample solution has a pH value of 5.1 or higher but 6.0 or lower, a temperature of 20° C. or higher but 50° C. or lower and a magnesium ion concentration of 100 mM or lower; and recovering said DNA bound to the quartz glass wool in the first binding reaction, and recovering the RNA bound to the quartz glass wool in the second binding reaction.