Direct Determination of Arsenic and Chromium in Seawater Samples Using On-Line Dilution and ICP-MS Analysis

被引:4
作者
Carmen Barciela-Alonso, Maria [1 ]
Castrelo Otero, Marta [1 ]
Dominguez Gonzalez, Maria Raquel [1 ]
Pena-Vazquez, Elena [1 ]
Bermejo-Barrera, Pilar [1 ]
机构
[1] Univ Santiago de Compostela, Fac Chem, Dept Analyt Chem Nutr & Bromatol, Ave Ciencias S-N, Santiago De Compostela 15782, Spain
关键词
ATOMIC-ABSORPTION-SPECTROMETRY; SEA-WATER; TRACE-METALS; SORPTION PRECONCENTRATION; ESTUARINE; MN;
D O I
10.46770/AS.2016.03.001
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
A method for total As and Cr determination in seawater samples has been developed. As and Cr were measured using the seaFAST2 automated sample introduction system coupled to an ICP-MS. The sampling system allows on-line sample dilution (10 times) before introduction into the ICP-MS. Calibration was performed using the standard addition method, working in the concentration range of 0 to 50 mu g L-1 for As and 0 to 25 mu g L-1 for Cr. The method shows good sensitivity resulting in LODs and LOQs of 0.3 and 0.9 mu g L-1, respectively, for As and of 0.03 and 0.09, respectively, for Cr determination. The method was precise (RSD <2%) and accurate. This method was applied to the determination of As and Cr in different seawater samples from the Galician coast of Spain. The concentrations found ranged from 0.3 to 3.1 mu g L-1 for As and from 0.03 to 0.1 mu g L-1 for Cr.
引用
收藏
页码:91 / 95
页数:5
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