Sample vaporization unit and gas chromatograph
A sample vaporization unit configured for vaporizing a sample injected from a syringe needle while supplying a carrier gas into a column is provided with a pipe, a heat conductive member, and a heater. The column is inserted into the pipe. The heat conductive member is provided along the outer circumference of the pipe. The heater is provided along the outer circumference of the heat conductive member. The heat conductive member is in line contact with the pipe along the axial direction in which the column extends at a plurality of circumferential locations on the outer circumferential surface of the pipe.
1 . A sample vaporization unit configured for vaporizing a sample injected from a syringe needle while supplying a carrier gas into a column, the sample vaporization unit comprising:
a pipe into which the column is inserted;
a heat conductive member provided along an outer circumference of the pipe; and
a heater provided along an outer circumference of the heat conductive member,
wherein the heat conductive member is in line contact with the pipe along an axial direction in which the column extends at a plurality of circumferential locations on the outer circumferential surface of the pipe, and
wherein the heat conductive member is provided with at least a first slit that is a cut portion of the heat conductive member and is fixed to the pipe in a state of being pressed in a direction in which a width of the first slit decreases.
2 . The sample vaporization unit as recited in claim 1 ,
wherein the heat conductive member is separated into at least a first heat transfer portion and a second heat transfer portion by the first slit and is fixed to the pipe in a state of being pressed in a direction in which a width of the first slit between the first heat transfer portion and the second heat transfer portion decreases.
3 . The sample vaporization unit as recited in claim 1 ,
wherein the heat conductive member is formed in a C-shaped cross-section having only one slit, the one slit being the first slit.
4 . The sample vaporization unit as recited in claim 1 ,
wherein the heat conductive member is fixed to the pipe by a pressing force from the heater wound around an outer circumference of the heat conductive member.
5 . The sample vaporization unit as recited in claim 1 ,
wherein the first slit extends linearly along the axial direction.
6 . The sample vaporization unit as recited in claim 1 ,
wherein the first slit extends to bend or curve in a direction intersecting with the axial direction.
7 . The sample vaporization unit as recited in claim 1 ,
wherein the first slit extends linearly in a direction intersecting with the axial direction.
8 . The sample vaporization unit as recited in claim 1 ,
wherein the sample vaporization unit injects the sample from the syringe needle inserted in a tip end portion of the column while supplying the carrier gas into the column and vaporizes the sample in the column.
9 . A gas chromatograph comprising:
the sample vaporization unit as recited in claim 1 ;
the column attached to the sample vaporization unit; and
a detector configured to detect components in the sample separated in the column.