TRAPPING MAGNETIC SORTING SYSTEM FOR TARGET SPECIES
First Claim
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1. A microfluidic sorting device for sorting a sample into substantially target and substantially non-target species, the device comprising:
- (a) a trapping module comprising a channel having two opposing walls, a magnetic field gradient generating structure on only one of the opposing walls for exerting a magnetic force on a sample to capture, at least temporarily, magnetic particles in the sample; and
(b) a pre-processing and/or a post-processing station integrated on the microfluidic sorting device with trapping module.
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Abstract
A system for sorting and trapping magnetic target species includes a microfluidic trapping module designed to receive and then temporarily hold magnetic particles in place within the module. The magnetic particles flowing into the module are trapped there while the other sample components (non-magnetic) continuously flow through and out of the station, thereby separating and concentrating the species captured on the magnetic particles. The magnetic particles and/or their payloads may be released and separately collected at an outlet after the sample passes through the trapping module.
127 Citations
31 Claims
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1. A microfluidic sorting device for sorting a sample into substantially target and substantially non-target species, the device comprising:
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(a) a trapping module comprising a channel having two opposing walls, a magnetic field gradient generating structure on only one of the opposing walls for exerting a magnetic force on a sample to capture, at least temporarily, magnetic particles in the sample; and (b) a pre-processing and/or a post-processing station integrated on the microfluidic sorting device with trapping module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for sorting a sample in a microfluidic sorting device that includes a trapping module and a magnetic field gradient generating structure on only one of two opposing walls of the trapping module, the method comprising:
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flowing a sample into the trapping module, said sample comprising a plurality magnetic particles with molecular recognition elements thereon, a target species, and a non-target species; generating a magnetic field gradient in the trapping module by exerting an external magnetic field from only one side of the module to the magnetic field gradient generating structure; and trapping magnetic particles in the trapping module proximate to the magnetic field gradient generating structure on one wall of the trapping module. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A microfluidic sorting device for sorting a sample into substantially target and substantially non-target species, the device comprising:
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(a) a trapping module comprising a channel having two opposing walls and no magnetic field gradient generating structure; (b) a pre-processing and/or a post-processing station integrated on the microfluidic sorting device with trapping module; (c) an external source on one side of the trapping module for generating a magnetic field; and (d) a mechanism to vary the magnetic field over time.
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Specification