摘要
根据《生活饮用水标准检验方法有机物指标标准》(GB/T5750.8-2006)附录B中的检测原理和方法,并结合JJF 1059-1999《测量不确定度评定与表示》和CNAS-GL06《化学分析中不确定度的评估指南》,对固相萃取-气相色谱质谱法测定饮用水中的莠去津浓度的不确定度进行了评估计算。分析了莠去津浓度测定过程中影响不确定度的各种来源,并对其引入的不确定度进行测算。合成了相对标准不确定度及相对扩展不确定度。结果表明,当水中莠去津的浓度为0.215μg/L时,检测结果表示为(0.215±0.00752)μg/L。固相萃取富集过程引入的不确定度对测量结果的影响最大。
According to the detection principles and methods given in the appendix B of the Standard Examtnation Methods of Drinking Water-Organic Parameters( GB/T5750. 8-2006),the description in the Guidance on Evaluating the Uncertainty in Chemical Analysis( CNAS-GL06),and the Evaluation and Expression of Uncertainty in Measurement( JJF 1059-1999),uncertainty of the determination of atrazine concentration in drinking water by Gas Chromatography-Mass Spectrometry using solid-phase extraction was evaluated. Various sources of uncertainty in the determination process of atrazine were analyzed and the uncertainty of the process was calculated. The relative standard uncertainty and the relative expanded uncertainty were synthesized. The assessment results showed that the detection result presented as 0. 215 ± 0. 00752 μg/L when the atrazine concentration in water was 0. 215 μg/L, and the solid-phase extraction had the greatest impact on the uncertainty of the measurement.
作者
冯桂学
王明泉
赵清华
陈家全
孙韶华
贾瑞宝
Feng Guixue;Wang Mingquan;Zhao Qinghua;Chen Jiaquan;Sun Shaohua;Jia Ruibao(Urban Water Supply and Wastewater Discharge Monitoring Center of Shandong Province,Jinan 250021,China)
出处
《环境保护科学》
CAS
2018年第4期93-97,共5页
Environmental Protection Science
关键词
饮用水
莠去津
固相萃取
气相色谱质谱法
不确定度
Drinking Water
Atrazine
Solid- phase Extraction
Gas Chromatography- Mass Spectrometry
Uncertainty