Liquid chromatograph for detecting harmful substances in domestic drinking water

The utility model discloses a liquid chromatograph for detecting harmful substances in domestic drinking water, which comprises a liquid chromatograph body, a fixed top plate is fixedly arranged at the upper end of the liquid chromatograph body, a plurality of clamping mechanisms are fixedly arranged in the upper end of the fixed top plate, each clamping mechanism comprises a protective frame, and the protective frames are fixedly arranged on the upper end of the fixed top plate. Threaded rods are connected to the two side walls of the protection frame in a threaded penetrating mode, fastening nuts are connected to the ends, located outside the protection frame, of the threaded rods on the two sides in a threaded mode, and sliding plates are fixedly connected to the ends, away from the fastening nuts, of the threaded rods and located in the protection frame. A solvent bottle filled with domestic drinking water passes through the space between the clamping blocks on the two sides and is placed in the limiting