离子色谱法测定核电厂闭式水体系中F-,Cl-,SO42-
周连宏,崔丽君,张龙,王宇宙
(山东核电有限公司,山东烟台 265110)
Determination of F-,Cl-,SO42- in closed water system of nuclear power plant by ion chromatography
周连宏,崔丽君,张龙,王宇宙
(Shandong Nuclear Power Company Ltd., Yantai 265110, China)
摘要:建立离子色谱法测定核电厂闭式水体系(含有高浓度钼酸盐、甲基苯并三氮唑钠盐、磷酸盐)中F-,Cl-,SO42-含量的方法。选用Metrosep-A Supp7-250/4.0色谱柱和Metro SPM Rotor型化学抑制器,以Na2CO3作为淋洗液,以抑制性电导检测器进行测定。核电厂闭式水样品中F-,Cl-,SO42-离子在各自的质量浓度范围内与色谱峰面积呈良好的线性关系,线性相关系数均不小于0.997,检出限分别为0.000 2,0.002 8,0.002 0 mg/L。加标回收率为93%~105%,测定结果的相对标准偏差为2.9%~6.9%(n=6)。该方法的检出限低,灵敏度高,可以推广应用。
Abstract:A method for determination of F-, Cl-, SO42- in closed water system (contains high concentrations of molybdate, sodium tolyltriazole, and phosphate) of nuclear power plant by ion chromatography was established. Three anions were separated on Metrosep-A Supp7-250/4.0 column with Metro SPM Rotor as chemical suppressor and Na2CO3 solution as eluentand, then determined by suppressed conductivity detector. The mass concentration of F-, Cl-, SO42- had a good linear relationship with the chromatographic peak area in their respective ranges, the correlation coefficients were more than 0.997, the detection limits of F-, Cl-, SO42- were 0.000 2, 0.002 8, 0.002 mg/L, respectively. The recoveries of the standard addition were 93%-105%. The relative standard deviation of determination results were 2.9%-6.9% (n=6).The detection limit of this method is low and the sensitivity is high, so this method can be popularized.
关键词:钼酸盐;磷酸盐;离子色谱;氟离子;氯离子;硫酸根离子
Keywords:molybdate; phosphate; ion chromatography; F-; Cl-; SO42-
本文引用格式:
周连宏,崔丽君,张龙,等.离子色谱法测定核电厂闭式水体系中F-,Cl-,SO42-[J].化学分析计量,2020,29(4):75-78. ZHOU L H,CUI L J,ZHANG L,et al. Determination of F-,Cl-,SO42- in closed water system of nuclear power plant by ion chromatography[J]. Chemical analysis and meterage,2020,29(4):75-78.
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