1. Designed for the purification of laboratory hydrochloric acid, nitric acid, and hydrofluoric acid to reduce the content of metal impurities in the acid. 2. Generally, for an acid with a metal impurity content of 10 ppb, after one purification, the metal impurity content can be reduced to about 0.01 ppb. 3. Meet the extremely low detection limit requirements of ICP-MS and provide laboratory-grade ultrapure acid for demanding analytical applications.