锶树脂用于水中210Pb测定中的方法研究  

Study on determination of 210Pb in water samples using Strontium resin

作　　者：王利华 张起虹 孙恋君 沈乐园 陶盛辉 WANG Lihua;ZHANG Qihong;SUN Lianjun;SHENG Leyuan;TAO Shenghui(Jiangsu Nuclear and Radiation Safety Supervision and Management Center,Nangjing^210019 China)

机构地区：[1]江苏省核与辐射安全监督管理中心,江苏南京210019

出　　处：《中国辐射卫生》2019年第3期313-317,320,共6页Chinese Journal of Radiological Health

基　　金：江苏省环保厅科研课题(2016006)

摘　　要：目的研究锶树脂用于分析水中^210Pb的方法探测下限、重复性、再现性和准确度。方法采集8种不同水样,用锶树脂吸附、纯化水中Pb,分析^210Pb的活度浓度,测定方法的探测下限、实验室内精密度和准确度;制备2种不同活度的^210Pb标准样品,开展实验室间方法验证,验证方法的重复性、再现性和准确度。结果锶树脂用于分析水中^210Pb,方法探测下限为0.64 mBq/L^1.26 mBq/L;实验室内测量相对标准偏差为4.7%~32.6%,平均加标回收率为85.5%~108.2%,标准样品测量误差为4.0%~14.2%;对0.153 Bq/L和1.77 Bq/L两个不同水平的方法验证样品,方法重复性限分别为0.021 Bq/L和0.14 Bq/L;再现性限分别为0.061 Bq/L和0.23 Bq/L;相对测量误差最终值分别为(9.1±18.6)%和(3.0±5.0)%。结论锶树脂用于分析水中^210 Pb,方法操作简便,精密度和准确度优于现行分析标准,满足管理部门要求,可在实际工作中进行推广。Objective To research the detection limit,repeatability,reproducibility and accuracy of the method to analyze the activity of^210Pb in water using Sr resin.Methods Collect eight types of water samples,adsorb and purify the Pb using Sr resin,determine the activity concentration of^210Pb,and identify the low limit of detection,the laborarory precision and accuracy of the method.Prepare two kinds of^210Pb standard samples,canrry out interlaboratory method verification and verify the repeatability,reproducibility and accuracy of the method.Results For the method of determinating^210Pb in water samples by Sr resin,the low limit of detection is 0.64mBq/L^1.26 mBq/L,the relative standard deviation is 4.7%~32.6%,the mean recovery rate is 85.5%~108.2%,the measurement error of standard samples is 4.0%~14.2%.For 0.153 Bq/L and 1.77 Bq/L standard samples,the repeatability limit of the measuring method is 0.021 Bq/L and 0.14 Bq/L,the reproducibility limit is 0.061 Bq/L and 0.23 Bq/L;the end value of relative error is(9.1±18.6)%and(3.0±5.0)%.Conclusion The method to anglyze the activity of^210Pb in water usping Sr resin is simple to operate,the precision and accuracy are better than the current analysis standards,and the method meets the management requirements and can be promoted in practical work.

关 键 词：锶树脂色层法 水中^210Pb 重复性 再现性 准确度 

分 类 号：O615[理学—无机化学]