电感耦合等离子体质谱法测定地下水中锑的不确定度评定  

Uncertainty Evaluation for the Determination Results of Antimony in Groundwater Samples by Inductively Coupled Plasma-Mass Spectrometry

作　　者：代阿芳[1,2] 鲁立强[1] 潘河 王苏明[2] 王亚平[2] 许春雪[2] 袁建[2] 

机构地区：[1]中国地质大学(武汉)材料科学与化学工程学院,湖北武汉430074 [2]国家地质实验测试中心,北京100037 [3]黑龙江省地质矿产测试应用研究所,黑龙江哈尔滨150036

出　　处：《岩矿测试》2010年第4期431-437,共7页Rock and Mineral Analysis

基　　金：国土资源部公益性行业科研专项经费资助(200811133)

摘　　要：采用不确定度连续传递模型对电感耦合等离子体质谱法测定地下水中锑元素含量进行不确定度评定,并采用x、y的相对差,对标准曲线进行双误差回归。结果表明,水样中锑含量越低,其相对不确定度越大,且标准曲线的拟合过程引入的不确定度对其总不确定度有较大的贡献率,这与实验室中的实际测试情况相吻合。The measurement uncertainty for the analytical results of Sb in groundwater samples by inductively coupled plasma-mass spectrometry（ICP-MS） was evaluated using continuous propagation model of uncertainty.The x,y relative error concept and double error regression method for calibration curve fitting were introduced.The results showed that the lower the concentration of Sb in the sample,the greater the relative uncertainty of the measurement results.And the sub-uncertainty from the fitting of the calibration curve seems one of the major contributor to the expanded uncertainty.

关 键 词：电感耦合等离子体质谱法 锑 地下水 不确定度评定 双误差回归 

分 类 号：O657.63[理学—分析化学] O213.1[理学—化学]