The  salt  content  in  water-soluble  dyes  is  an  important  indicator  that  needs  to  be  controlled  in  ink  production. Membrane separation or chemical methods can remove most of the salt, and the remaining trace salt after making ink still has an undeniable impact on the application performance and equipment damage of the ink. Water-soluble dyes have strict restrictions on the salt content, so it is necessary to establish a method for determining trace salt in water-soluble dyes. The national standard for detecting trace salts in dyes is susceptible to interference from different complex matrices. Ion chromatography is an ideal and effective method for analyzing inorganic anions and cations.