Carbon dioxide is the main component of dry ice, which can be used for electronic and nuclear industry cleaning, cleaning the internal grease and dirt of robots and automation equipment; Cleaning of integrated circuit boards, post weld flux, contaminated coatings, resins, solvent coatings, protective layers, and photosensitive anti-corrosion agents on  printed  circuit  boards.  Chlorine  ions  have  strong  corrosiveness  to  circuits  or  metals.  This  article  uses  ion chromatography to detect the chloride content in carbon dioxide production processes.