Method and apparatus for automated sample preparation
The present teachings provide apparatuses and methods for automated handling of samples, e.g., biological or chemical samples. The apparatuses and the methods of the present teachings allow automated performance of various sample manipulation steps without manual intervention. In a preferred embodiment, the present teachings provide apparatuses and methods for automated enrichment of templated beads produced by PCR.
1. A method for automated processing of templated beads, the method comprising:
transferring using an automated sample manipulation apparatus a sample to a sample site, wherein the sample comprises a liquid portion and a magnetic bead portion, the magnetic bead portion including complexes of magnetic enrichment beads and templated beads, wherein the templated beads are carriers of amplified sample templates;
immobilizing the magnetic bead portion of the sample in the sample site by applying a magnetic field to the sample site with the automated sample manipulation apparatus, thereby providing an immobilized magnetic bead portion of the sample;
treating the immobilized magnetic bead portion of the sample with a treatment including washing, mixing, heating or stirring, and combinations thereof using the automated sample manipulation apparatus, thereby enriching the immobilized magnetic bead portion of the sample; and
following treating, removing using the automated sample manipulation apparatus the liquid portion of the sample from the immobilized magnetic bead portion of the sample, the immobilized magnetic bead portion of the sample thereby remaining in the sample site.
2. The method of claim 1 , wherein the sample site is located on a platform of the automated sample manipulation apparatus, the platform comprising a plurality of sites to hold a plurality of samples.
3. The method of claim 2 , wherein the plurality of sample sites are arranged in an array.
4. The method of claim 1 , wherein before treating the immobilized magnetic bead portion of the sample, the method further comprises:
transferring using the automated sample manipulation apparatus materials for treating the immobilized magnetic bead portion of the sample from a plurality of material sites preloaded with reagents, solutions, buffers, washes and solvents.
5. The method of claim 4 , wherein the plurality of material sites are arranged in an array.
6. The method of claim 4 , wherein transferring materials includes transferring a material from at least one material site preloaded with reagents, solutions, buffers, washes and solvents to the sample site.
7. The method of claim 6 , wherein transferring the material from the at least one material site to the sample site comprises aspirating the material from the at least one material site and dispensing the material at the sample site.
8. The method of claim 1 , wherein applying the magnetic field comprises applying an electromagnetic field.
9. The method of claim 1 , after removing the liquid portion, further comprising:
washing using the automated sample manipulation apparatus the sample site containing the magnetic bead portion of the sample with a wash solution; and
removing the magnetic field from the sample site using the automated sample manipulation apparatus.