离子色谱法测定生活饮用水中4种阴离子含量的不确定度评定  

Uncertainty evaluation of determination of 4 anions in drinking water by ion chromatography

作　　者：王艳鑫 张亚南 刘瑞朋 尹少禹[1] WANG Yan-Xin;ZHANG Ya-Nan;LIU Rui-Peng;YIN Shao-Yu(Zhangjiakou Center for Disease Control and Prevention,Zhangjiakou 075100,China;Xiongxian County Center for Disease Control and Prevention,Baoding 071000,China)

机构地区：[1]张家口市疾病预防控制中心,张家口075100 [2]雄县疾病预防控制中心,保定071000

出　　处：《食品安全质量检测学报》2020年第8期2529-2534,共6页Journal of Food Safety and Quality

摘　　要：目的评定离子色谱法测定生活饮用水中F^-、Cl^-、NO3^-、SO4^2-4种阴离子含量的不确定度,提高实验结果准确性。方法依据JJF 1059.1-2012《测量不确定度评定与表示》分析实验过程中引入的不确定度来源,计算各不确定度分量,最终合成扩展不确定度。结果在95%的置信区间下,样品检测结果:F-含量为(0.034±0.002)mg/L,Cl^-含量为(0.617±0.027)mg/L,NO3^-含量为(0.345±0.076)mg/L,SO42-含量为(2.387±0.049)mg/L(k=2)。结论在实验过程中,不确定度主要来自标准曲线的拟合,其次是制备标准溶液和测量的重复性。Objective To evaluate the uncertainty of the determination of F^-,Cl^-,NO3^-,SO4^2-in drinking water by ion chromatography,and to improve the accuracy of experimental results.Methods According to JJF 1059.1-2012 Assessment and expression of measurement uncertainty,the sources of uncertainty introduced during the experiment were analyzed,and the various uncertainty components were calculated,and finally the extended uncertainty was synthesized.Results Under the 95%confidence interval,the sample detection results were as follows:the content of F^-,Cl^-,NO3^-and SO4^2-was(0.034±0.002),(0.617±0.027),(0.345±0.076)and(2.387±0.049)mg/L(k=2),respectively.Conclusion In the experimental process,the uncertainty mainly comes from the fitting of the standard curve,followed by the preparation of the standard solution and the repeatability of the measurement.

关 键 词：离子色谱法 不确定度 氟化物 氯化物 硝酸盐 硫酸盐 

分 类 号：TU991.2[建筑科学—市政工程]