Improved chromatographic instrument

The utility model relates to the technical field of ion chromatographs, in particular to an improved chromatograph which comprises a machine body, a front panel, heat dissipation holes and a clamping assembly, the front panel is fixedly connected with the surface of the machine body, the heat dissipation holes are formed in the side surface of the machine body, a containing groove is formed in the upper surface of the machine body, and the clamping assembly is arranged on the inner wall, located in the square groove, of the machine body. The clamping assembly comprises a guide rail, a groove is formed in the inner wall, located in the containing groove, of the machine body, the guide rail is bolted with the inner wall of the groove, an L-shaped support is fixedly connected to the inner wall, located in the containing groove, of the machine body, a first clamping plate is bolted to the upper surface of the L-shaped support, and a sliding block is slidably connected to the surface of the guide rail. According t