紫外吸收法测定固定污染源废气二氧化硫的不确定度评定
Uncertainty assessment of sulfur dioxide of fixed pollution source waste gas measured by ultraviolet absorption method
魏静1
作者信息
- 1. 江苏省镇江环境监测中心,镇江 212009
- 折叠
摘要
目的 测量不确定度是与测量结果紧密相关的参数,在实验室数据质量控制上不可或缺.本文通过对固定污染源排气中二氧化硫排放浓度不确定度的来源进行分析,找出影响测定结果的各个不确定度分量,进行测量不确定度的分析评定,为分析判断环境监测数据的准确性提供重要参考,以校准结果.方法 按照紫外吸收法测定测定固定污染源废气中二氧化硫排放浓度.结果 测定结果的扩展不确定度为 6.9%.结论 因仪器系统效应引入的不确定度分量较大.除定期送技术监督部门检定外,仪器的使用者也要定期进行维护保养,进行必要的期间核查,以保证仪器的准确度和测量重复性.
Abstract
Objective Measurement uncertainty is a parameter closely related to the measurement results and is indispensable for the quality control of laboratory data.In this paper,we analyze the source of the uncertainty of sulfur dioxide emission concentration in the exhaust of fixed pollution sources,find out the various uncertainty components affecting the measurement results,and conduct the analysis and evaluation of the measurement uncertainty,so as to provide an important reference for the analysis and judgment of the accuracy of environmental monitoring data and calibrate the results.Methods The concentration of sulfur dioxide emission in fixed pollution waste gas is measured according to UV absorption method.Results The extended uncertainty of the resulting determination was 6.9%.Conclusion The uncertainty component introduced by the instrument system effect is relatively large.In addition to regular sending to the technical supervision department for verification,the user of the instrument should also carry out regular maintenance and necessary period verification to ensure the accuracy of the instrument and the repetition of the measurement.
关键词
紫外吸收/二氧化硫/不确定度/标准方法Key words
ultraviolet absorption/sulfur dioxide/uncertainty/the standard method引用本文复制引用
出版年
2024
NETL
NSTL
万方数据