电感耦合等离子体光谱法测定土壤中镍的不确定度评定  

Uncertainty evaluation for the determination of nickel in soil by inductively coupled plasma optical emission spectrometry

作　　者：张辰凌[1] 刘佳 韩梅[1] 贾娜[1] 刘冰冰[1] 张永涛[1] ZHANG Chenling;LIU Jia;HAN Mei;JIA Na;LIU Bingbing;ZHANG Yongtao(Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Science,Key laboratory of groundwater sciences and engineering,Ministry of Nature Resources,Zhengding 050803,China)

机构地区：[1]中国地质科学院水文地质环境地质研究所,自然资源部地下水科学与工程重点实验室,河北正定050803

出　　处：《化学分析计量》2023年第1期88-91,共4页Chemical Analysis And Meterage

基　　金：中国地质科学院水文地质环境地质研究所基本科研业务费项目(SK202004)。

摘　　要：建立电感耦合等离子体光谱法测定土壤中镍含量的不确定度评定方法。根据JJF 1135—2005《化学分析测量不确定度评定》和JJF 1059.1—2012《测量不确定度评定与表示》中的有关规定,分析了不确定度的来源,量化了各不确定度分量,计算得到了合成不确定度和扩展不确定度。采用置信概率为95%,包含因子k=2,电感耦合等离子体光谱法测定土壤样品中镍的质量分数测定结果为(35.3±1.2)mg/kg。影响结果不确定度的主要因素为校准曲线拟合、标准溶液配制、样品处理及测量重复性等。The measurement uncertainty of the determination of nickel in soil by inductively coupled plasma optical emission spectrometry(ICP-OES)was evaluated.According to JJF 1135—2005 Evaluation of Uncertainty in Chemical Analysis Measurement and JJF 1059.1—2012 Evaluation and Expression of Uncertainty in Measurement,the sources of uncertainty were analyzed and each component of uncertainty was quantified and used to obtain combined uncertainty and expanded uncertainty.The final result of nickel content in soil by inductively coupled plasma spectrometry was(35.3±1.2)mg/kg(k=2,P=95%).The main factors affecting the uncertainty of the results were calibration curve fitting,standard solution preparation,pretreatment process and measurement repeatability.

关 键 词：不确定度 电感耦合等离子体光谱法 镍 土壤 

分 类 号：O657[理学—分析化学]