Jasco Corporation

Takeshi Kanomata

Shinichi Kikuchi

Hiroaki Yamura

Muneo Saito

Mitsunori Sakamoto

Seiji Horioka

Shin-ichi Kikuchi

Takahiro Kadota

Shigenori Hashimoto

Hiroyuki Hakozaki

Yoshiteru Horikawa

Kazuharu Okubo

A high-pressure fluorescence flow cell comprises a cell body made of a light-transmissive material, wherein the cell body is penetrated by a straight-line flow path for a high-pressure fluid, wherein the flow path is formed with a cross section of 0.1 mmto 5 mm, both inclusive, orthogonal to its longitudinal direction, wherein the ratio t/d of the wall thickness t (mm) to the width d (mm) of the flow path satisfies formula () below, where &#x3c3; indicates the tensile stress (MPa) of the material of the cell body, and P indicates the withstand pressure (MPa) of the cell body.

High-pressure fluorescence flow cell, flow cell assembly, fluorescence detector, and supercritical fluid chromatograph

A pressure control apparatus for a supercritical fluid according to the present invention includes: a valve comprising; a valve chamber provided in a midway of a channel through which a supercritical fluid passes; and an electrically-operated valve element located in the valve chamber; a pressure detection member for detecting the pressure of the supercritical fluid in the channel on an upstream or downstream side of the valve chamber; an open/close control member for controlling the pressure detected by the pressure detection member to be a target pressure; and a valve-opening rate adjustment member for adjusting the valve-opening rate when the valve is opened based on the state of the supercritical fluid.

Pressure control apparatus for supercritical fluid

A pressure gauge mounted to a pump or a back pressure regulator in an HPLC, SFC, or SFE system provides improved solvent exchange and improved measurement precision. A through hole having an inside diameter of 1.0 mm is made in a hexagonal member similar in shape to a pipe joint. A part of the hexagonal member is cut away to form a flat surface such that the distance to the outside periphery of the through hole is 0.5 mm to serve as a strain-measurement strain gauge attaching surface. One strain gauge is attached to the center of the strain-measurement strain gauge attaching surface, and two strain gauges are attached for temperature correction, one on the same surface as the strain-measurement strain gauge attaching surface and the other on an outside surface of the hexagonal member.

Very-small-capacity pressure gauge

There is provided a sample collection container, a sample collection apparatus, and a sample collection method used in a supercritical fluid system capable of collecting a multi-constituent sample contained in a supercritical fluid at low cost and high collection efficiency. The pressure of a supercritical fluid containing a sample is reduced to a pressure close to the atmospheric pressure, and the depressurized supercritical fluid is forced to undergo adiabatic expansion to form gas-phase COcontaining a liquid component in the form of aerosol. The gas-phase COis fractionated for each constituent of the contained sample, transferred to a probeof Liquid Handler, and dispensed into a large number of collection vialsunder the atmospheric pressure, each of which is provided with a vial cap. The aerosol-containing gas-phase COis sprayed through the tip of an introduction tubeprovided in each of the vial capin a direction downwardly-inclined from the tangential direction along an inner circumferential surfaceof the corresponding collection vial, and swirls and falls in the collection vial. In this process, the liquid component containing the sample collides with the inner circumferential surfaceand is trapped thereon, whereas the gas-phase COis discharged out of a discharge holein the vial cap

Sample collection container, sample collection apparatus, and sample collection method in supercritical fluid system

A UV detector for liquid chromatography is equipped with a light source; a flow cell having a light entrance side and a light exit side; a first optical system for shining light from the light source into the flow cell so as to form an image roughly at the light exit side of the flow cell or at a position outside the flow cell at a prescribed distance away from the light exit side thereof; a light detector; a second optical system for directing light exiting the flow cell to the light detector; and a truncated cone shaped sample chamber formed in the flow cell along the axial direction thereof, with the base of the truncated cone being positioned at the light entrance side of the flow cell.

UV detector for liquid chromatography

A spectrometer slit switching mechanism includes a slit plate having a plurality of entrance slits and exit slits formed at prescribed positions, parallel support rods for supporting the slit plate so as to be movable along the support rods, a screw portion formed on at least one support rod for transmitting forced to the slit plate, and a driving motor for transmitting rotational energy to the support rod provided with the screw portion, wherein the entrance slits are arranged on a line that runs parallel to the direction of movement of the slit plate and the exit slits are arranged on a line that is both parallel to and spaced a prescribed distance from the line on which the entrance slits are arranged. In accordance with this structure, the driving motor is operated in the clockwise and counterclockwise directions to raise and lower the slit plate in order to align a desired entrance slit and exit slit with the light path of the spectrometer. Also, after the desired slits have been positioned and the driving motor is stopped, the slit plate is prevented from moving downwards by the engagement of the slit plate with the screw portion of the support rod, and this eliminates the need for an excitation current to be supplied to the driving motor.

Spectrometer slit switching mechanism

A flow cell (112) used for detecting a characteristic of a continuously-flowing fluid comprises a narrow inlet path (118) for the fluid, a flow cell portion (112) having a diameter larger than that of the narrow inlet path (118), and flow-regulating portion (122) which is disposed between the narrow inlet path (118) and the flow cell portion (112) and has a diameter substantially the same as that of the flow cell portion (112) and a plurality of holes (134a to 134d), such that the fluid is introduced from the narrow inlet path (118) into the flow cell portion (112) by way of each of the holes (134a to 134d) of the flow-regulating portion (122).

Flow cell assembly

A lamp unit is provided with a projecting portion on the inner wall of the lamphouse in the vicinity of the arc portion. The lamphouse is ventilated by the van provided at one end of the lamphouse and the vent provided at the other end. The inner diameter of the lamphouse at the arc portion provided with the projecting portion is smaller than that of both end portions, so that the flow velocity of the air passing through the lamphouse is higher in the vicinity of the arc portion, which produces a heat of a high temperature. Even if the lamp is horizontally installed, which lowers the heat dissipation efficiency, since the lamp is adequately air-cooled, an extreme temperature rise is prevented. The lamphouse is removeably mounted, and the lamp is mounted in a cartridge. The cartridge may be inserted into the lamphouse for replacement of the lamp.

Growing community of inventors

Hachioji, Japan

Takeshi Kanomata