Mitsui Kensetsu Kabushiki Kaisha

Nippon Sanso Corporation

Mitshi Kensetsu Kabushiki Kaisha

Hidetoshi Yoshida

Toshiyuki Noji

Eiji Tatsumi

Hideyuki Kosaka

Shinichi Akao

Makoto Tanaka

Tsutomu Kikuchi

Tetsuya Kimijima

Akira Nishina

An analyzing apparatus for assaying various kinds of trace impurity contents in various kinds of high-purity gases, having an atmospheric pressure ionization mass spectrometer useful for determination of trace impurity contents in such high-purity gases on the ppb to sub ppb levels and a gas chromatograph integrated therewith, enabling high efficiency determination of trace impurity contents in high-purity gases. The analyzing apparatus having a gas chromatograph ( ) and an atmospheric pressure ionization mass spectrometer ( ), is provided with a system ( ) for introducing a sample gas introduced from a sample gas introduction source directly to the atmospheric pressure ionization mass spectrometer ( ); a system ( ) for introducing the sample gas via the gas chromatograph ( ) to the atmospheric pressure ionization mass spectrometer ( ); and a channel selector ( ) for changing over the channel of the sample gas to either of these two systems.

System for analyzing trace amounts of impurities in gases

There are provided an apparatus for analyzing gases and a gas analyzing method which can securely detect presence and absence of leakage in a short time and which can carry out analyses successively, safely and accurately in a stable state. The apparatus for analyzing gases is provided with sample gas introducing systems (,to,) for introducing a plurality of sample gases selectively, and analyzers (,and,), and also has means (,) for monitoring, when a sample gas under determination is changed over to another sample gas, change in the concentration of the sample gas component introduced before the change over.

Multi-gas analysis system for analyzing high-purity gases

A damping device has a liquid vessel into which the liquid is injected having the flattening wave motion water surface formed in such a manner that the wave motion direction of the wave motion water surface is a strecher one, damping members are provided in order to damp the sloshing of liquid in the liquid vessel, and wave dissipation devices are disposed at the portion which isn't always soaked in liquid in the liquid vessel. Accordingly, the vibration in a construction occurring by wind, earthquake and the like is absorbed by means of viscosity resistance occurring between liquid and damping member, and the vibration is restricted. Moreover, damping performance can be efficiently exercised by providing various kinds of installation forms.

Damping device in a structure and damping construction and damping

A damping device has a liquid vessel into which the liquid is injected having the flattening wave motion water surface formed in such a manner that the wave motion direction of the wave motion water surface is a strecher one, damping members are provided in order to damp the sloshing of liquid in the liquid vessel, and wave dissipation devices are disposed at the portion which isn't always soaked in liquid in the liquid vessel. Accordingly, the vibration in a construction occurring by wind, earthquake and the like is absorbed by means of viscosity resistence occurring between liquid and damping member, and the vibration is restricted. Moreover, damping performance can be efficiently exercised by providing various kinds of installation forms.

Damping device in a structure

A damping device has a liquid vessel into which a liquid is injected having a wave motion water surface such that the wave motion direction of the wave motion of the water surface is in the elongated direction of the vessel. Damping members are provided in order to damp the sloshing of liquid in the liquid vessel, and wave dissipation devices are disposed at a portion not always soaked in liquid in the liquid vessel. Accordingly, the vibration of a construction occurring by wind, earthquake and the like is absorbed by the viscosity resistance occurring between the liquid and the damping members, and the vibration is restricted. Moreover, damping performance can be efficiently exercised by providing various installation arrangements.

Growing community of inventors

Tokyo, Japan

Hidetoshi Yoshida