A method of making depth filtration media, such as for use in a depth filter, are described. The resulting depth filtration media includes a core tube having two or more different layers. The layers can be fibers, such as polymeric or inorganic fibers, wrapped layers of a filter material, or pleated and folded layers of a filter material.

A filter element includes a porous membrane and a metallic glass material. The porous membrane is made of a polymer material. The metallic glass material is formed on two opposite surfaces of the porous membrane. The metallic glass material is coated on a plurality of fibrous structures of the porous membrane to improve the strength and the characteristics of the porous membrane.

An object of the present invention is to provide a chemical liquid purification method by which a chemical liquid capable of inhibiting the occurrence of short in a semiconductor substrate manufactured by a photolithography process is obtained. Another object of the present invention is to provide a chemical liquid manufacturing method and a chemical liquid. The chemical liquid purification method of the present invention includes a purification step of filtering a liquid to be purified by using a filter, in which a filter satisfying a condition 1 or a condition 2 in the following test is used as the filter.

Test: 1,500 ml of a test liquid formed of the organic solvent is brought into contact with the filter for 24 hours under a condition of 23 C., and a content of particles containing at least one kind of metal selected from the group consisting of Fe, Al, Cr, Ni, and Ti in the test liquid after the contact satisfies a predetermined condition.

An independent blood filter device depends on flow geometry to deliver blood serum or plasma free of detrimental levels of hemoglobin. It depends critically on an upstream flow rate or pressure differential limiting control element or device that limits the rate of change of pressure differential across the filter element. Pre-evacuated versions can be used to simultaneously draw blood from a living being and provide pressure differential across the filter element between an evacuated collector and a supply end open to atmosphere. A unit pressurized by hand motion employs the external shape of a partially filled blood collection tube as a piston to produce pressure in advance of the control element or device to create the pressure differential across the filter element to a collector vented to atmosphere. The control element or device is disclosed in numerous forms, including specially sized flow constrictions and compliant arrangements.

An independent blood filter device depends on flow geometry to deliver blood serum or plasma free of detrimental levels of hemoglobin. It depends critically on an upstream flow rate or pressure differential limiting control element or device that limits the rate of change of pressure differential across the filter element. Pre-evacuated versions can be used to simultaneously draw blood from a living being and provide pressure differential across the filter element between an evacuated collector and a supply end open to atmosphere. A unit pressurized by hand motion employs the external shape of a partially filled blood collection tube as a piston to produce pressure in advance of the control element or device to create the pressure differential across the filter element to a collector vented to atmosphere. The control element or device is disclosed in numerous forms, including specially sized flow constrictions and compliant arrangements.

Devices and methods are provided that permit efficient and selective separation of liquid biological specimens into at least two constituent components to facilitate subsequent quantitative and qualitative analysis on at least one analyte of interest in at least one of the components. The devices generally include one or more sample deposition regions supported on a base. Each sample deposition region includes a separation membrane for separating the liquid biological specimen into two different fractions. The first fraction is trapped by the separation membrane while the second fraction passes through the separation membrane and into a respective collection membrane. The separation and collection membranes are easily separable from the devices and can be utilized for further processing and analysis.

A filter element for filtering a fluid is described. The filter element comprises diamond particles fixed to a filter substrate. Also described is a method for the manufacture of the filter element and a filtration device comprising the filter element.

A membrane separation system is provided comprising at least two membranes in series. A first membrane in the series is oleophobic and comprises: (a) a porous substrate; and (b) an oleophobic coating layer applied to at least one surface of the substrate. A second membrane in the series is hydrophilic. The second membrane may comprise a hydrophilic porous substrate, and/or the second membrane further comprises a hydrophilic coating layer applied to at least one surface of the second membrane substrate. Also provided are methods of separating aqueous emulsions, comprising: (i) contacting an aqueous emulsion with the membrane separation system described above; and (ii) allowing water in the emulsion to permeate through the membrane separation system to yield an aqueous product stream.

A membrane separation system is provided comprising at least two membranes in series. A first membrane in the series is oleophobic and comprises: (a) a porous substrate; and (b) an oleophobic coating layer applied to at least one surface of the substrate. A second membrane in the series is hydrophilic. The second membrane may comprise a hydrophilic porous substrate, and/or the second membrane further comprises a hydrophilic coating layer applied to at least one surface of the second membrane substrate. Also provided are methods of separating aqueous emulsions, comprising: (i) contacting an aqueous emulsion with the membrane separation system described above; and (ii) allowing water in the emulsion to permeate through the membrane separation system to yield an aqueous product stream.

A cell for enhancing a lithium (Li) concentration in a stream includes a housing; a dense lithium selective membrane located in the housing and dividing the housing into a first compartment and a second compartment; a cathode electrode located in the first compartment; an anode electrode located in the second compartment; a first piping circuit fluidly connected to the second compartment and configured to supply a feed stream to the second compartment; a second piping circuit fluidly connected to the first compartment and configured to circulate an enrichment stream through the first compartment; and a power source configured to apply a voltage between the cathode electrode and the anode electrode to initiate an oxidative electrochemical reaction on the anode electrode and a reductive electrochemical reaction on the cathode electrode. The dense lithium selective membrane has a thickness less than 400 m.