Method of the Simultaneous Determination of Anions and Cations Using a Nanosized Cation Exchanger and On-Column Formation of Anionic Chelates

Resumo

A method is proposed for the simultaneous determination of anions and cations of chelating metals based on anion chromatography with the chemical suppression of electrical conductivity of the mobile phase. It is distinguished by a high selectivity of the separation of groups of anions and cations. To implement the method, a special treatment of the protecting precolum with a nano-cation exchanger hydrosol solution is carried out and a special mode of operation of the automatic sample introduction device is used. The developed method can be implemented on any ion chromatograph. Examples of rapid analyses of tap and mineral waters for the concentration of inorganic anions, hardness salts, and zinc and copper impurities are given.