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《Journal of Instrumental Analysis》 2017-04
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Simultaneous Determination of Multiple Macro-Trace Elements in Seawater by ICP-MS Combined with Mg(OH)_2 Co-precipitation and Direct Dilution Pretreatment

LIU Wei;SONG Jin-ming;YUAN Hua-mao;LI Xue-gang;LI Ning;DUAN Li-qin;Key Laboratory of Marine Ecology and Environmental Sciences,Institute of Oceanology,Chinese Academy of Sciences;University of Chinese Academy of Sciences;Shandong Analysis and Test Center;Qingdao National Laboratory for Marine Sciences and Technology;  
Two methods, including Mg(OH)_2 co-precipitation and direction dilution, were compared in the determination of multiple major/trace elements in sea water by inductively coupled plasma mass spectrometric( ICP-MS) method. Suitable analytical methods were defined respectively to provide practical means for the determination of these elements in seawater by ICP-MS. The results showed that,Mg(OH)_2 co-precipitation could achieve the separation,enrichment and accurate determination of 19 elements including V,Cr,Mn,Co,Cd and rare elements( La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu),while 10 fold direct dilution method could be accurately and simultaneously used to determine 13 major/trace elements including B,Sr,Li,Rb,I,V,Cr,As,Cd,U,Mo,Cu,Mn,but it is not suitable for the detection of Zn,Ni,Co,Pb and low concentration elements like rare earth elements. The two methods are suitable for simple and rapid determination of elements with high accuracy and precision. Combining the two methods togeth-er,accurate determination of 28 elements,including Co,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu( 15 elements,by Mg(OH)_2 co-precipitation) and B,Sr,Li,Rb,I,V,Cr,As,Cd,U,Mo,Cu,Mn( 13 elements,by 10 fold direct dilution) could be achieved with about 50 m L of offshore and open sea water.
【Fund】: 青岛海洋科学与技术国家实验室“鳌山人才”计划项目(2015ASTP-OS13);; 深海预研专项(2016);; 山东省-国家基金委联合基金(U1406403);; 中国科学院仪器设备功能开发技术创新项目(GYH201301);中国科学院创新先导项目(XDA11020102)
【CateGory Index】: X834;O657
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