GF-AAS与ICP-MS测定水中总铬含量的方法比对及其不确定度评定  

Comparison of Determination Methods between GF-AAS and ICP-MS for Total Chromium Content in Water and the Uncertainty Evaluation

作　　者：赵静[1,2,3] 谭亮[3] 冀恬[3] 任倩雯[3] 李玉林 王环[1,2,3] ZHAO Jing;TAN Liang;JI Tian;REN Qianwen;LI Yulin;WANG Huan(Key Laboratory of Tibetan Medicine Research,Chinese Academy of Scineces,Xining 810008,China;Qinghai Provincial Key Laboratory of Tibetan Medicine Pharmacology and Safety Evaluation,Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810008,China;Analysis and Testing Center,Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810008,China)

机构地区：[1]中国科学院藏药研究重点实验室,青海西宁810008 [2]中国科学院西北高原生物研究所青海省藏药药理学和安全性评价研究重点实验室,青海西宁810008 [3]中国科学院西北高原生物研究所分析测试中心,青海西宁810008

出　　处：《净水技术》2023年第3期181-188,共8页Water Purification Technology

基　　金：中国科学院兰州区域中心自主知识课题(1z2023g105)。

摘　　要：石墨炉原子吸收光谱(GF-AAS)法和电感耦合等离子体质谱(ICP-MS)法是灵敏度较高的2种测定水中铬含量的方法。文中采用357.9 nm与429.0 nm波长条件下GF-AAS法、52与53质核比条件下ICP-MS法测定水质铬标准物质中总铬元素含量,从标准曲线、准确性、重复性、加标回收率、检出限、定量限、测量不确定度评定多个方面进行对比分析。结果表明,4组测定条件下,标准物质测定结果均在标准值不确定度范围内。其中,429.0 nm波长GF-AAS法测定结果相对其他3组显著偏低(P<0.05);ICP-MS法在检出限、定量限方面优于GF-AAS法;GF-AAS法测定结果357.9 nm波长优于429.0 nm波长。Graphite furnace atomic absorption spectrometry(GF-AAS)and inductively coupled plasma mass spectrometry(ICP-MS)are two methods for determining the Cr content in water with high sensitivity.In this paper,GF-AAS methods at 357.9 nm and 429.0 nm wavelength and ICP-MS methods at 52 and 53 mass nuclear ratio were used to determine the content of total chromium in chromium reference materials for water quality.A comparative analysis was made from the aspects of standard curve,accuracy,repeatability,standard recovery rate,detection limit,quantitation limit and evaluation of measurement uncertainty.The results showed that the determination results of reference materials were within the scope of the standard uncertainty.The results of 429.0 nm wavelength GF-AAS method were significantly lower than other determination methods(P<0.05).ICP-MS method was better than GF-AAS method in terms of detection limit and quantitation limit.In GF-AAS method,357.9 nm wavelength was better than 429.0 nm wavelength.

关 键 词：石墨炉原子吸收光谱法 电感耦合等离子体质谱法 铬 测量不确定度评定 方法对比 

分 类 号：X832[环境科学与工程—环境工程]