Patent ID: 7902122

Claim:
A method for detecting a target biological material using DNA barcodes, the method comprising: attaching a first type of DNA probes to the surface of magnetic particles to prepare magnetic particles for isolation wherein the first type of DNA probes are at least partially complementary to a DNA target biological material of interest; attaching a second type of DNA probes to the surface of polymer particles to prepare polymer particles for analysis wherein the second type of DNA probes are at least partially complementary to the DNA target material but are different from the first type of DNA probes, and attaching double stranded DNA barcodes as identification codes to the surface of the polymer particles wherein the DNA barcodes are present in an amount at least three times the amount of the second type of DNA probes, such that the DNA barcodes have a predetermined sequence portion corresponding to SEQ ID No. 3 and which are labeled with a label material; reacting the magnetic particles for isolation, the polymer particles for analysis and the DNA target material in a hybridization reaction buffer to prepare composites, each of which consists of one magnetic particle for isolation, the DNA target material and one polymer particle for analysis; separating the composites from unreacted reactants using a magnetic separator; heating the separated composites to denature the DNA barcodes present in the polymer particles for analysis and removing the magnetic particles for isolation and the polymer particles for analysis from the composites by centrifugation to isolate the DNA barcodes; and detecting a signal generated from the label material bound to the isolated DNA barcodes.