The disclosure relates to methods and apparatus for processing fluids through the use of a magnetic assembly wherein the magnetic assembly includes at least one fluid chamber containing a fluid and magnetic particles.

The present invention relates to a method for separating biomolecules from a liquid medium. The method comprises adding magnetic nanoparticles to the liquid medium comprising the biomolecules, the biomolecules each adapted to bind to respective surfaces of the magnetic nanoparticles; bringing the liquid medium to which the magnetic nanoparticles have been added into contact with a collector; applying a magnetic field to the liquid medium in contact with the collector to attract the magnetic nanoparticles ound with the biomolecules to a surface of the collector; and applying an electric potential to the surface of the collector to release the biomolecules from the magnetic nanoparticles.

In at least one illustrative embodiment, a method for contaminant detection includes distributing multiple magnetostrictive sensors on a nonmagnetic index plate. The index plate includes multiple wells formed in a top surface that are each sized to receive a magnetostrictive sensor. The method further includes placing a magnetic backing plate below the index plate, inverting the index plate and the magnetic backing plate, and then placing the inverted index plate on a sample surface. The sample surface may be two-dimensional food such as fresh vegetable leaves. The method may further include placing the index plate and the magnetic backing plate on a nonmagnetic cover plate that is positioned above a sensor coil. The method further includes removing the magnetic backing plate, removing the index plate, and applying a varying magnetic field with the sensor coil to a magnetostrictive sensor positioned on the cover plate. Other embodiments are described and claimed.

Separate cleaning assembly for magnet assemblies formed by at least one magnet rod, wiper assembly and magnet handle device, the cleaning assembly including a base and vertically extending main body, wherein the cleaning assembly includes retaining means for retaining the magnet assembly to the main body and receiving means for receiving and accommodating the wiper assembly, wherein the receiving means for the wiper assembly is arranged to moving means arranged for moving the wiper assembly in longitudinal direction of the magnet rods.

A method for filtering magnetic particles includes spinning a filter including a plurality of pores within a substrate. The method further includes applying, subsequent to spinning the filter, an external magnetic field to the filter. The method includes disposing a solution including a first particle and a second particle onto the filter. The first particle includes a magnetic particle of interest. The method further includes separating the first particle from the second particle by capturing the first particle within a pore of the plurality of pores within the substrate.

A method for filtering magnetic particles includes spinning a filter including a plurality of pores within a substrate. The method further includes applying, subsequent to spinning the filter, an external magnetic field to the filter. The method includes disposing a solution including a first particle and a second particle onto the filter. The first particle includes a magnetic particle of interest. The method further includes separating the first particle from the second particle by capturing the first particle within a pore of the plurality of pores within the substrate.

A system is provided for the quantitative magnetic separation of magnetic objects (e.g., particles or cells). The system uses magnetic ratcheting over arrays of ferromagnetic elements having gradient spacing manifested in various pitch zones that are encountered by the magnetic objects as they traverse the array. The system can be used to separate and concentrate magnetic objects based on iron oxide content. For cells, different phenotypes may be separated based, for example, on surface expression of proteins or molecules that are bound to magnetic particles. The system includes a substrate or chip having the array of ferromagnetic elements with increasing lateral pitch and an externally driven magnet device that generates a cycling magnetic field. Magnetic objects with higher IOC separate and equilibrate along the array at larger pitches. The system can be used for the differential sorting of particles and cells of interest.

A planar magnet for magnetic density separation, comprising an array of pole pieces succeeding in longitudinal direction of a mounting plane, each pole piece having a body extending transversely along the mounting plane with a substantially constant cross section that includes a top segment that is curved to distribute the magnetic field associated with the top surface of the pole piece such that its strength transverse to the mounting plane is substantially uniformly distributed in planes parallel to the mounting plane, the curved top segments having a width (w) in longitudinal direction of the mounting plane and a maximum height (h) transverse to the mounting plane, wherein the top segments of successive pole pieces are unequal in height and/or width.

A magnetic separator comprising a concurrent tank body and a permanently magnetic barrel, wherein the rotation direction of the permanently magnetic barrel is opposite to the inlet direction of the ore slurry; a stationary magnetic system is provided; the inlet side of the tank body is connected to a tubular ore-feeding box; the included angle of the magnetic system is in the range of 200°-280°; the region of the magnetic system closer to the inlet side of the tank body is a refining region of the magnetic system; at an upstream position in the tank body, a plurality of rinsing water pipes are provided; several spraying nozzles are provided at intervals on the rinsing water pipes; and several stripe-shaped magnetically conductive thin sheets are provided at intervals on an inner wall of the permanently magnetic barrel.

A magnetic filter 10 includes first and second separation chambers 10, 12. The separation chambers 10, 12 each have an inlet and an outlet, and the separation chambers 10, 12 are joined together such that the inlets of the first and second chambers are adjacent, and the outlets of the first and second chambers are adjacent. An inlet port arrangement 28 connects both inlets to a single inlet pipe, and an outlet port arrangement 30 connects both outlets to a single outlet pipe.