Shimadzu Corporation

Showa Denko Materials Co., Ltd.

Hitachi Chemical Company, Ltd.

Michio Butsugan

Masaru Watanabe

Yasushi Gotoh

Tomoko Higashiuchi

Ryoichi Nakanishi

Keita Sakurai

Fumihiko Kawauchi

Risa Ishii

Yuka Fujito

Supercritical fluid extraction can experience problems of prolonged extraction times and undesired elution of target components of a trap sample. To resolve these problems, a sample is stored in a container () disposed upstream of a back-pressure control valve (). A mixed fluid of carbon dioxide in a supercritical state and a modifier is introduced into the container, and a component contained in the sample is extracted. The extracted component is introduced into a trap column () together with the carbon dioxide and the modifier and collected in the trap column. The trap column is loaded with polymer beads as a filler to securely collect an extracted component in the trap column, even when the modifier in the supercritical fluid is increased.

Extract recovery method and analysis method using polymer beads in a trap when using supercritical extraction

A column packing material for supercritical fluid chromatography which allows good peak shape to be obtained in the analysis of free fatty acids, etc. and in the analysis of agricultural chemicals, etc., and has excellent durability for repeated analysis. The column packing material for supercritical fluid chromatography includes polymer particles containing cross-linked polymer, the degree of swelling of which after absorbing tetrahydrofuran and the degree of swelling of which after absorbing methanol are both 1.4 or less.

Column packing material for supercritical fluid chromatography, column for supercritical fluid chromatography and preparation method therefor

The present invention provides a separation material including porous polymer particles that comprise at least one of styrene and divinylbenzene as a monomer unit at a proportion of 90% by mass or more based on the total amount of the monomers; and a coating layer that comprises a macromolecule having hydroxyl groups and covers at least a portion of the surface of the porous polymer particles, wherein the coating amount provided by the coating layer is 1 to 15 mg/mper unit specific surface area of the porous polymer particles.

Separation material

The present invention provides a separation material that comprises porous polymer particles comprising a styrene-based monomer as a monomer unit; and a coating layer comprising a macromolecule having hydroxyl groups, which covers at least a portion of the surface of the porous polymer particles, and the separation material has a 5% compressive deformation modulus of 100 to 1,000 MPa, and has a mode diameter in the pore size distribution of 0.1 to 0.5 &#x3bc;m.

The present invention provides a separation material comprising porous polymer particles that comprise a styrene-based monomer as a monomer unit; and a coating layer that comprises a macromolecule having hydroxyl groups and covers at least a portion of the surface of the porous polymer particles, wherein the rupture strength is 10 mN or higher.

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Hitachi, Japan

Michio Butsugan