Method for purification of nucleic acids, particularly from fixed tissue
The invention relates to a method for purification of nucleic acids, to a kit for performing the method according to the invention and to a new application of magnetic particles for purification of a biological sample. The method according to the invention comprises the following steps: a) accommodating of the sample in a first sample vessel in an aqueous solution and lysing of the sample under non-chaotropic conditions; suspending of first magnetic particles in the solution and inserting of the first sample vessel in a sample vessel holder, wherein the sample vessel is inserted in the annular interior space of a ring magnet associated with the sample vessel holder; separating of the solution from the magnetic particles; and isolating of the nucleic acids from the solution.
1. An automated system comprising:
a rack for at least one sample vessel;
a temperature-controlled device having at least one slot for the sample vessel;
a sample vessel holder for accommodating at least one sample vessel;
a device for transporting the sample vessel holder from the rack to the temperature-controlled device;
a device for transferring liquid from a sample vessel and/or into a sample vessel;
a control for controlling the transport device, the liquid transfer device, and for controlling the temperature of the temperature-controlled device;
wherein the sample vessel holder for accommodating the at least one sample vessel comprises at least one annular magnet, in the annular interior space of which the sample vessel is accommodated.
2. A sample vessel holder for accommodating the at least one sample vessel, comprising at least one annular magnet, in the annular interior space of which the sample vessel is accommodated.
3. The sample vessel holder as claimed in claim 2 , wherein a ring inner diameter of the annular magnet is, at its narrowest point, 4 mm to 50 mm.
4. The sample vessel holder as claimed in claim 3 , wherein the ring inner diameter of the annular magnet is, at its narrowest point, 4 mm to 20 mm.
5. The sample vessel holder as claimed in claim 3 , wherein the ring inner diameter of the annular magnet is, at its narrowest point, 5 mm to 15 mm.
6. The sample vessel holder as claimed in claim 3 , wherein the ring inner diameter of the annular magnet is, at its narrowest point, 6 mm to 12 mm.
7. The sample vessel holder as claimed in claim 3 , wherein the ring inner diameter of the annular magnet is, at its narrowest point, about 8 mm.
8. The sample vessel holder as claimed in claim 3 , wherein the ring inner diameter of the annular magnet is, at its narrowest point, 4 mm to 50 mm, and a ring outer diameter is 1 cm to 2 cm.
9. The sample vessel holder as claimed in claim 2 , wherein the annular magnet comprises a neodymium-containing alloy.
10. The sample vessel holder as claimed in claim 2 , wherein the annular magnet comprises a ring inner diameter that is smaller than a diameter of a collar on of the at least one sample vessel, but larger than an outer diameter of a cylindrical region of the at least one sample vessel.