Abstract: A mass spectrometer includes: a first ion guide disposed in a first intermediate vacuum chamber; a first partition wall portion which constitutes at least a part of a partition wall separating the first intermediate vacuum chamber and a second intermediate vacuum chamber and has an ion passage hole; a second ion guide disposed in a second intermediate vacuum chamber; a second partition wall portion which constitutes at least a part of a partition wall which is a subsequent stage of the second intermediate vacuum chamber and has an ion passage hole; a first holding portion configured to integrally hold the first ion guide and the first partition wall portion; a second holding portion configured to hold the second ion guide; a coupling portion detachably connecting the first holding portion and the second holding portion; and a vacuum chamber main body portion to which an ion transport unit is detachably mounted.

Abstract: A column oven comprises: an analysis column including a base end portion positioned on an upstream side in a flow direction of the mobile phase, a tip end portion positioned on a downstream side in the flow direction, and an intermediate portion between the tip end portion and the base end portion; a holding member configured to hold the analysis column; and a heating section configured to heat the analysis column held by the holding member. The holding member includes a base portion and a first sandwiching portion and a second sandwiching portion provided at the base portion to sandwich the intermediate portion of the analysis column and having protruding portions protruding to an opposite side of the analysis column from the base portion in a sandwiching state, and the base portion, the first sandwiching portion, and the second sandwiching portion are integrally formed.

Abstract: A column oven comprises: an analysis column including a base end portion positioned on an upstream side in a flow direction of the mobile phase, a tip end portion positioned on a downstream side in the flow direction, and an intermediate portion between the tip end portion and the base end portion; a holding member configured to hold the analysis column; and a heating section configured to heat the analysis column held by the holding member. The holding member includes a base portion and a first sandwiching portion and a second sandwiching portion provided at the base portion to sandwich the intermediate portion of the analysis column and having protruding portions protruding to an opposite side of the analysis column from the base portion in a sandwiching state, and the base portion, the first sandwiching portion, and the second sandwiching portion are integrally formed.