Method and device for analyzing ion components in ultrapure water

A method for analyzing an ion component in pure water, which concentrates a sample ultrapure water and analyzes the concentrated sample ultrapure water by an analysis means, is characterized in that the sample ultrapure water is concentrated by an electrodialysis device. The electrodialysis device is a second electrodialysis device (20) in which sample ultrapure water is introduced into the first generation chamber (27), a high-purity nitric acid aqueous solution is introduced into the second generation chamber (28), and concentrated water for analysis is taken out from the second generation chamber (28). The high-purity aqueous nitric acid solution introduced into the second generation chamber (28) is generated by dialyzing the aqueous potassium nitrate solution using the first electrodialysis device (10). 一种纯水中的离子成分的分析方法，其对试样超纯水进行浓缩并通过分析机构进行分析，其特征在于，通过电透析装置对试样超纯水进行浓缩。电透析装置是第二电透析装置(20)，向第一生成室(27)通入试样超纯水，向第二生成室(28)通入高纯度硝酸水溶液，自第二生成室(28)取出分析用浓缩水。通入至第二生成室(28)的高纯度硝酸水溶液是利用第一电透析装置(10)对硝酸钾水溶液进行透析处理而生成。