Shimadzu Corporation

Yasunori Terai

Masayuki Okada

Hajime Takemoto

Hirokazu Taniuchi

Kiyonori Koga

Ryo Takechi

Shinji Uchiyama

Yoshihiko Ide

Shoji Ide

In a main body of a filter apparatus, an internal space A corresponding to a flow path of gas is formed in an annular shape, and a filter material filled in the internal space A is disposed in an annular shape. For this reason, it is possible to keep a cross-sectional area of the filter material large when compared to a case in which the filter material is disposed in an elongated shape, reduce flow path resistance, and keep a speed (linear velocity) of gas passing through the inside of the filter material low. Further, it is possible to improve capturing efficiency of the filter material. In addition, one end edge of a flow path, and flow paths and are formed at one end of the main body.

Filter device for gas chromatograph and gas chromatograph

A gas chromatograph for preventing leakage of carrier gas and secondary accident such as explosion is provided. A flow rate restricting valve having valve mechanism which mechanically restricts flow rate of carrier gas is disposed at the upstream side of sample inlet portionof the carrier gas flow pathand apart from the flow rate control valvewhich controls the flow rate of the carrier gas, which is inlet into sample inlet portion and analytical column according to signal from control unit. The excessive flow rate that is larger than the predetermined resulted from the leakage of carrier gas is mechanically restricted to a pre-set flow rate by using the flow rate restricting valve. The leakage of carrier gas e.g., helium and the secondary accident due to leakage of carrier gas e.g., hydrogen, are prevented.

Gas chromatograph

A ferrule containeris provided with a ferrule accommodating partand a first column guide part. A ferrule is accommodated in the ferrule accommodating part. The first column guide partguides a column so as to insert the column into the ferrule accommodated in the ferrule accommodating part. Guiding of the column by the first column guide partenables the column to be smoothly and reliably inserted into the ferrule accommodated in the ferrule accommodating part. Consequently, unlike a case in which an operator inserts a column while pinching a ferrule with hand, the work of inserting a column into a ferrule can easily be performed.

Ferrule container, and ferrule container containing ferrule

A ferruleis pressed by a pressing plate, and the ferruleis thereby sandwiched and fixed between a ferrule receiving partand ferrule pressing part. The pressing plateis displaced by a displacing mechanism, whereby the pressing plateis switched between a contacting state in which the pressing plateis in contact with the ferruleand a non-contacting state in which the pressing plateis not in contact with the ferruleand the ferrulecan pass thorough the inside of the ferrule pressing part. By displacement of the pressing plateto the non-contacting state, the ferrule pressing partcan be extracted from the ferruleside, and the ferrule pressing partcan therefore be removed from a columnin a state in which the ferruleis attached in a swaged fashion.

Column attachment device

One end of carrier gas channel, purge gas channel and split gas channel is connected to sample gasification chamber. The other end of carrier gas channel, purge gas channel, and split gas channel is connected to a flow rate control mechanism in the form of carrier gas flow rate control block, purge gas flow rate control block and split gas flow rate control block respectively. Carrier gas flow rate control block, purge gas flow rate control block and split gas flow rate control block constitute a flow rate control unit. This reduces the possibility of leakage of gas to the outside and admixture of impurities from the outside in the flow rate control mechanism.

Flow rate control mechanism and gas chromatograph including flow rate control mechanism

To provide a discharge ionization current detector, where a partitionin which a through hole for penetrating a tubulefor introducing a sample gas is created is provided between a collector electrodeand an outlet for discharging a gasso that a gas for generating plasma that has been generated by electrodes for dischargeandpasses through a gap between the through hole and the tubuleso as to be directed towards the outlet for discharging a gas, and thus, the air that has entered from the other sideof the partition cannot pass through the through hole in the opposite direction.

Discharge ionization current detector and gas chromatograph

A gas chromatography device adapted for detecting leakage of hydrogen gas without using an air pump and long piping is provided. The gas chromatography device includes: a column oven having a housing, a column disposed in the housing, and a heater heating air in the housing; a sample vaporization chamber supplying a sample to an inlet end of the column; a carrier gas supply section supplying a carrier gas to the sample vaporization chamber; a detector connected to an outlet end of the column; a controller controlling the heater and the carrier gas supply section; and a hydrogen gas detecting sensor. The carrier gas is hydrogen gas. A through hole is formed in the housing and a material that allows hydrogen to pass through but does not transmit heat is disposed in the through hole. The hydrogen gas detecting sensor is disposed near the through hole outside the housing.

Growing community of inventors

Kyoto, Japan

Yasunori Terai