Hitachi-high-technologies Corporation

Hitachi, Ltd.

Nobuhiro Tsukada

Yoshihiro Nagaoka

Hideo Enoki

Hironobu Yamakawa

Isao Yamazaki

Kunio Harada

Sakuichiro Adachi

Hironori Kaji

Daisuke Akieda

Ayano Otsubo

The present invention provides a pretreatment device for a sample for analysis that makes it possible to send a sample liquid to an arbitrary treatment module connected to a sample liquid conveyance flow route, and an analysis system using the same. A pretreatment device for a sample for analysis according to the present invention is at least provided with a plurality of sample liquid treatment modules for introducing a sample liquid or carrying out prescribed pretreatment on the sample liquid, a first flow path for conveying the sample liquid or the pretreated sample liquid between the plurality of sample liquid treatment modules, and a conveyance direction switching part for switching the conveyance direction of the sample liquid or the pretreated sample liquid in the first flow path. The sample liquid treatment modules have an introduction flow path for introducing the sample liquid or the pretreated sample liquid from the first flow path, a discharge flow path for sending the sample liquid or the pretreated sample liquid to the first flow path, and a flow path switching part for switching the state of communication with the first flow path of the introduction flow path and the discharge flow path.

Pretreatment device for sample for analysis, and analysis system using same

A chemical analysis apparatus includes a liquid delivery device and a liquid discharge unit discharging delivered liquids, the liquid delivery device including: a first liquid delivery unit delivering a first liquid containing an analysis object; a second liquid delivery unit delivering a second liquid not containing an analysis object; a measurement unit measuring physical properties of the delivered first liquid; first and second liquid pools containing the delivered first liquid and second liquid; and a plurality of passive valves. The apparatus further includes: a first flow passage connecting the first liquid delivery unit and the liquid delivery device; a second flow passage connecting the measurement unit and the second liquid pool; a third flow passage connecting the second liquid delivery unit and the liquid discharge unit; a first air hole provided in the first liquid pool; and a second air hole provided in the second liquid pool.

Liquid delivery device and chemical analysis apparatus using liquid delivery device

A liquid mixing device that decreases a concentration non-uniformity in the flow direction of a mobile phase and a liquid chromatograph that uses the liquid mixing device are provided. The liquid mixing device is configured to include a flow channel unit that is made from an introduction channel, a branch portion that is positioned in a downstream of the introduction channel, multiple branched flow channels that branch from the branch portion, a junction portion in which the multiple branched flow channels join together, and a discharge channel of the downstream of the junction portion. The multiple branched flow channels are different in terms of any one of, or several of width, depth, and length that are associated with an external shape, and a structure filling the inside of the flow channel and thus the times for the liquid to pass through the branched flow channels are different from each other.

Liquid mixing device and liquid chromatograph

A chemical analyzer supplies a sample and a reagent into a reaction container provided with an opening mixes a fluid which is to be measured and contains the sample and reagent supplied into the reaction container, measures a property of the fluid in the reaction container, and controls the drive for the mixer. The mixer has a vertical drive machine to move the mixing tool up and down. The control unit controls the vertical drive machine to move the mixing tool up and down in the fluid to be measured in the reaction container so as to cause upward and downward flow of the fluid which is to be measured and is positioned below the mixing tool.

Chemical analyzer

A liquid transfer device electrically controls liquid position. The surface of the liquid transfer device is provided with unevenness in order to solve a problem of having a large number of electrodes for controlling voltage. The number of electrodes for controlling voltage can be halved by the utilization of a restoring force of the liquid to a spherical shape by surface tension, in addition to an electrical force.

Growing community of inventors

Hitachinaka, Japan

Nobuhiro Tsukada