Method and device for analyzing ionic components in ultrapure water

Abstract

Provided is a method which is for analyzing ionic components in pure water and in which sample ultrapure water is concentrated and analyzed by an analysis means, the method being characterized in that the sample ultrapure water is concentrated by means of an electrodialyzer. The electrodialyzer is a second electrodialyzer () in which sample ultrapure water is passed through a first generation chamber (), high-purity nitric acid aqueous solution is passed through a second generation chamber (), and concentrated water for analysis is extracted from the second generation chamber (). The high-purity nitric acid aqueous solution passing through the second generation chamber () is generated by dialyzing a potassium nitrate aqueous solution by a first electrodialyzer ().