摘要
采用电感耦合等离子体发射光谱法(ICP-OES)和原子荧光光谱法(AFS)测定了工业废水中的砷(As)含量,分析了测定过程中两种检测方法的不确定度来源,并对不确定度分量进行了量化和合成。结果表明:当采用ICP-OES测定As质量浓度为41.20μg/L的工业废水时,扩展不确定度为5.20μg/L,废水中As质量浓度表示为(41.20±5.20)μg/L(k=2);当采用AFS测定As质量浓度为4.21μg/L的工业废水时,扩展不确定度为0.48μg/L,废水中As质量浓度表示为(4.21±0.48)μg/L(k=2);标准曲线拟合是两种测定方法不确定度的主要来源;标准溶液配制是影响ICP-OES不确定度的主要因素之一;样品前处理过程是影响AFS不确定度的重要因素。
The content of As in industrial wastewater was determined by inductively coupled plasma optical emission spectrometry(ICP-OES)and atomic fluorescence spectrometry(AFS),the sources of uncertainty in the determination process of the two methods were analyzed,and the uncertainty components were quantified and synthesized.The results show that:When ICP-OES method is used to determine the industrial wastewater with 41.20μg/L of As mass concentration,the extended uncertainty is 5.20μg/L,and the As mass concentration is expressed as(41.20±5.20)μg/L(k=2);When AFS method is used to determine the industrial wastewater with 4.21μg/L of As mass concentration,the extended uncertainty is 0.48μg/L,and the As mass concentration is expressed as(4.21±0.48)μg/L(k=2);Standard curve fitting is the main source of uncertainty of the two methods;Standard solution preparation is one of the main factors affecting the uncertainty of ICP-OES method;The sample pre-treatment process is an important factor affecting the uncertainty of AFS method.
作者
李贵森
LI Guisen(Fujian Electronics and Information(Group)Co.,Ltd.,Fuzhou 350005,China)
出处
《化工环保》
CAS
CSCD
北大核心
2023年第6期857-863,共7页
Environmental Protection of Chemical Industry
