Abstract: An analyzer capable of preventing unintended removal of a separation column is provided. A liquid chromatograph includes: a plurality of separation columns, and that are connected in parallel and removable; a plurality of analysis flow passages that are respectively connected to the plurality of separation columns and configured to allow a sample to flow through each of the plurality of separation columns; a lock mechanism that is configured to restrict removal of the separation columns and other than the separation column to be removed; and a control device that is configured to control the lock mechanism.

Abstract: A chromatograph allows easy replacement of a separation column while preventing an operator from contacting with a configuration related to the separation column. A column cartridge accommodates the separation column and is detachably provided in a predetermined column installation position. An upstream pipe is detachably provided on the column cartridge in a state of being installed at the column installation position, and supplies a mobile phase to the separation column of the column cartridge. A downstream pipe is detachably provided on the column cartridge in a state of being installed at the column installation position, and delivers the mobile phase that has passed through the separation column of the column cartridge. A cover integrally covers the column installation position, the upstream pipe, and the downstream pipe and has an insertion hole that allows the column cartridge to be installed from the outer side of the cover.

Abstract: A technique for replacing a separation column includes: a driving device supporting a first pipe along a first direction; a fixing member that fixes a second pipe to be opposed to the first pipe along the first direction; a column case between the first pipe and the second pipe, having a first and second holes communicating with the first and second pipes, respectively; and an interlocking mechanism that moves the column case in the first direction in conjunction with movement of the first pipe. The column case allows a column cartridge retaining a separation column to be connected and disconnected. The driving device moves the first pipe and the interlocking mechanism such that two states are reversibly taken; a closed state in which the separation column is between the first and second pipes and an open state in which the first and second pipes are positioned outside the column case.

Abstract: Provided is an analyzer column cartridge that can control the temperature of an analysis column while saving resources and costs. An analyzer column cartridge 1 includes: metal blocks 7, 8 that accommodate an analysis column 10 used in a liquid chromatography; and housings 2, 3 that accommodate the metal blocks 7, 8. A plurality of holes 11A, 11B, 11C, 11D, and 11E that communicate with an accommodation space of the analysis column 10 are formed in the metal block 8. The housing has a plurality of windows 6A, 6B, 6C, 6D, and 6E formed at positions facing the plurality of holes 11A, 11B, 11C, 11D, and 11E formed in the metal block 8.

Abstract: Prior to a stopping step in which spark-out is conducted, a spacing step of operating a moving mechanism to space a chuck table and a grinding wheel from each other while maintaining a state in which a plurality of grindstones and a workpiece are in contact with each other is carried out. In the spacing step, a grinding load is reduced. Thus, as compared to the case where the spacing step is not conducted, the length of time necessary for completing the spark-out is shortened, and the length of time necessary for grinding the workpiece can be restrained from being prolonged.