液相色谱—质谱法测定水中苯氧羧酸类除草剂的不确定度评定  

Evaluation of uncertainty in determination of phenoxycarboxylic acid herbicides in water by liquid chromatography-mass spectrometry

作　　者：张肇元 于晓青 Zhang Zhaoyuan;Yu Xiaoqing(Tianjin Eco-Environmental Monitoring Center,Tianjin 300191,China)

机构地区：[1]天津市生态环境监测中心,天津300191

出　　处：《皮革制作与环保科技》2021年第13期160-162,共3页Leather Manufacture and Environmental Technology

摘　　要：采用高效液相色谱-质谱法测定地下水中8种苯氧羧酸类除草剂,通过分析实验过程中不确定度的来源,识别出不确定度来源于样品的量取、样品定容、回收率、结果重复性和标准溶液配制步骤,并对以上不确定度的分量分别进行评定,最终计算得到合成不确定度和扩展不确定度。通过分析各分量所占比例,提出在实验过程中减小不确定度的方法。Using high performance liquid chromatography-mass spectrometry determination of 8 kinds of phenoxycarboxylic acid herbicides in groundwater,through the analysis of the sources of uncertainty in the process of experiment,identify the uncertainty comes from the measuring of the sample,sample volume,recovery rate,the repeatability and standard solution preparation steps,and the components of the uncertainty over assess respectively,f inally,the resultant uncertainty and the extended uncertainty are calculated.By analyzing the proportion of each component,a method to reduce the uncertainty in the process of experiment is proposed.

关 键 词：苯氧羧酸类除草剂 液相色谱-质谱法 不确定度 

分 类 号：O65[理学—分析化学]