摘要
Abstract
Metal ions of the water containing boric acid are usually detected by atomic absorption spectroscopy and inductively coupled plasma optical emission spectrometer in nuclear power plants . Under the existence of the boric acid in water , the metal ion recovery rate and accuracy are significantly affected by boric acid with the method of atomic absorption spectroscopy . T he limit of detection of inductively coupled plasma optical emission spectrometer is not enough to meet the need of trace metal ions in nuclear power plants .In this study ,using the selective permeability of ion exchange membranes of suppressor to remove boric acid online ,the metal ions were accurately determined by ion chromatography .The recovery rates of standard addition ,relative standard deviations and method detection limits of Li + ,Na+ ,K+ ,Mg2+ and Ca2+ are 97.0%‐102.3% , 0.54%‐1.25% ( n = 7 ) and 2.58‐40.38 ng/L respectively , w hich demonstrates that this method can be applied in the analysis of Li + ,Na+ ,K+ ,Mg2+and Ca2+ concentrations in nuclear power plants .This method has the advantage of easy operation ,reliability ,fast speed and low detection limits .关键词
含硼酸水/离子色谱/痕量金属离子Key words
water containing boric acid/ion chromatography/trace metal ion分类
化学化工
