摘要
采用不确定度连续传递模式，建立了离子色谱法测定岩溶地下水中硫酸根分析结果不确定度的评定模型。评定结果表明，测定结果的不确定度主要来源于标准溶液引入的不确定度、曲线拟合产生的不确定度和测定过程引入的不确定度3部分。采用x,y的相对差，对校准曲线进行双误差回归，对评定过程中各个不确定度分量进行量化，最后通过计算合成得到硫酸根测定结果的不确定度评定模型。
An uncertainty evaluation method for suHate determination m karst undergrouncl water by ion chromatography detection technology is proposed. Using continuous propagation model of uncertainty, the sulfate measurement uncertainty is evaluated. The main sources of measurement uncertainty come from sub-uncertainties of calibration solutions, calibration curve fitting and measurements process. The double-error regression is used in the process of standard curve fitting. Based on the quantitative analysis of each uncertainty component during experimental results, the standard uncertainty model for sulfate determination results is obtained.
出处
《计量学报》
CSCD
北大核心
2013年第6期611-616,共6页
Acta Metrologica Sinica
基金
国土资源部地质大调查项目（1212011121164）
关键词
计量学
双误差回归
硫酸根
不确定度
离子色谱法
Metrology
Double-error regression
Sulfate
Uncertainty
Ion chromatography
