A separation device includes: a container that includes a storage portion for storing liquid containing magnetic particles; and a coil that separates the magnetic particles from the liquid by generating a magnetic field through application of current, causing a magnetic force to act on the magnetic particles in a state where the coil stops with respect to the storage portion, and causing the magnetic particles to move from the storage portion against gravity acting on the liquid containing the magnetic particles.

A purification apparatus includes a holding unit including a bottom plate for supporting a bottom portion of a container to be mounted, and a magnetic unit arranged on the bottom plate or below the bottom plate so as to face the bottom portion of the container. The magnetic unit fixes magnetic particles of an amorphous metal to an inner bottom portion or an inner wall of the container so as to separate a liquid in the container and the magnetic particles contained in the liquid from each other and/or to collect the liquid while leaving the magnetic particles in the container.

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.

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.

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.

The invention relates to a system, comprising: a) a sample processing unit, comprising an input port and an output port coupled to a rotating container having at least one sample chamber, the sample processing unit configured provide a first processing step to a sample or to rotate the container so as to apply a centrifugal force to a sample deposited in the chamber and separate at least a first component and a second component of the deposited sample; and b) a sample separation unit coupled to the output port of the sample processing unit, the cell separation unit comprising separation column holder (42), a pump (64) and a plurality of valves (1-11) configured to at least partially control fluid flow through a fluid circuitry and a separation column (40) positioned in the holder, the separation column configured to separate labeled and unlabeled components of sample flowed through the column.

A filter is used for removing metallic contaminants in a solvent used in microcircuit fabrication. The filter includes a filter housing including a filter membrane for filtering solvent including metallic contaminants, and a magnet arranged about the filter housing and configured to generate a magnetic field to attract the metallic contaminants prior to the metallic contaminants entering the filter membrane. The magnet is arranged such that the magnetic field of the magnet is greater in a periphery of the filter housing compared to a central portion of the filter housing.

The present invention relates to a particle manipulation method to disperse magnetic particles 70 in a liquid 35 filling up a tube container 10, wherein a circumferential direction moving step to move the magnetic particles 70 along the circumferential direction of the container 10 in the liquid 35 and in a radial direction moving step to move the magnetic particles 70 as crossing the radial direction of the container 10 in the liquid 35 are implemented repeatedly. Such manipulations can be achieved by combining rotation of the container and gravity force and magnetic field manipulations.

Microfluidic systems and methods are described for capturing magnetic target entities bound to one or more magnetic beads. The systems include a well array device that includes a substrate with a surface that has a plurality of wells arranged in one or more arrays on the surface. A first array of wells is arranged adjacent to a first location on the surface. A second and subsequent arrays, if present, are arranged sequentially on the surface at second and subsequent locations. When a liquid sample is added onto the substrate and caused to flow, the liquid sample will flow across the first array first and then flow across the second and subsequent arrays in sequential order. The wells in the first array each have a size that permits entry of only one target entity into the well and each well in the first array has approximately the same size.

A method for providing magnetic fluid treatment in which at least one electrical conductor comprising at least one length of an electrical conducting material having a first conductor lead and a second conductor lead is energized. The electrical conductor is coiled with at least one turn to form at least one uninterrupted coil of electrical conductor encircling at least a section of an outer surface of a conduit. Energizing the at least one electrical conductor establishes a magnetic field having lines of flux directed along the flow path and concentrated in a non-magnetically conductive region located between two magnetically conductive regions. A fluid is directed through the conduit past the non-magnetically conductive region to provide magnetic fluid treatment to the fluid.