Abstract: 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.

Abstract: 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 portion 1 of the carrier gas flow path 11 and apart from the flow rate control valve 6 which controls the flow rate of the carrier gas, which is inlet into sample inlet portion and analytical column according to signal from control unit 8. 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.

Abstract: A ferrule container 1 is provided with a ferrule accommodating part 11 and a first column guide part 12. A ferrule is accommodated in the ferrule accommodating part 11. The first column guide part 12 guides a column so as to insert the column into the ferrule accommodated in the ferrule accommodating part 11. Guiding of the column by the first column guide part 12 enables the column to be smoothly and reliably inserted into the ferrule accommodated in the ferrule accommodating part 11. 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.

Abstract: 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.

Abstract: A ferrule 10 is pressed by a pressing plate 35, and the ferrule 10 is thereby sandwiched and fixed between a ferrule receiving part 20 and ferrule pressing part 30. The pressing plate 35 is displaced by a displacing mechanism 350, whereby the pressing plate 35 is switched between a contacting state in which the pressing plate 35 is in contact with the ferrule 10 and a non-contacting state in which the pressing plate 35 is not in contact with the ferrule 10 and the ferrule 10 can pass thorough the inside of the ferrule pressing part 30. By displacement of the pressing plate 35 to the non-contacting state, the ferrule pressing part 30 can be extracted from the ferrule 10 side, and the ferrule pressing part 30 can therefore be removed from a column 2 in a state in which the ferrule 10 is attached in a swaged fashion.

Abstract: 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.

Abstract: A ferrule 10 is pressed by a pressing plate 35, and the ferrule 10 is thereby sandwiched and fixed between a ferrule receiving part 20 and ferrule pressing part 30. The pressing plate 35 is displaced by a displacing mechanism 350, whereby the pressing plate 35 is switched between a contacting state in which the pressing plate 35 is in contact with the ferrule 10 and a non-contacting state in which the pressing plate 35 is not in contact with the ferrule 10 and the ferrule 10 can pass thorough the inside of the ferrule pressing part 30. By displacement of the pressing plate 35 to the non-contacting state, the ferrule pressing part 30 can be extracted from the ferrule 10 side, and the ferrule pressing part 30 can therefore be removed from a column 2 in a state in which the ferrule 10 is attached in a swaged fashion.

Abstract: A ferrule container 1 is provided with a ferrule accommodating part 11 and a first column guide part 12. A ferrule is accommodated in the ferrule accommodating part 11. The first column guide part 12 guides a column so as to insert the column into the ferrule accommodated in the ferrule accommodating part 11. Guiding of the column by the first column guide part 12 enables the column to be smoothly and reliably inserted into the ferrule accommodated in the ferrule accommodating part 11. 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.

Abstract: To provide a discharge ionization current detector 3, where a partition 13a in which a through hole for penetrating a tubule 24 for introducing a sample gas is created is provided between a collector electrode 20 and an outlet for discharging a gas 26 so that a gas for generating plasma that has been generated by electrodes for discharge 15, 16 and 17 passes through a gap between the through hole and the tubule 24 so as to be directed towards the outlet for discharging a gas, and thus, the air that has entered from the other side 25 of the partition cannot pass through the through hole in the opposite direction.

Abstract: 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.

Abstract: 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.

Abstract: To provide a discharge ionization current detector 3, where a partition 13a in which a through hole for penetrating a tubule 24 for introducing a sample gas is created is provided between a collector electrode 20 and an outlet for discharging a gas 26 so that a gas for generating plasma that has been generated by electrodes for discharge 15, 16 and 17 passes through a gap between the through hole and the tubule 24 so as to be directed towards the outlet for discharging a gas, and thus, the air that has entered from the other side 25 of the partition cannot pass through the through hole in the opposite direction.

Abstract: 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 portion 1 of the carrier gas flow path 11 and apart from the flow rate control valve 6 which controls the flow rate of the carrier gas, which is inlet into sample inlet portion and analytical column according to signal from control unit 8. The excessive flow rate that exceeds the constant flow rate 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.