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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 |
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| DOI： |
| KeyWord:Mg(OH)2 co-precipitation direct dilution ICP-MS elements determination sea water |
| Author | Institution |
| LIU Wei,SONG Jin-ming,YUAN Hua-mao,LI Xue-gang,LI Ning,DUAN Li-qin |
1.中国科学院海洋研究所海洋生态与环境科学重点实验室;2.中国科学院大学;3.山东省分析测试中心;4.青岛海洋科学与技术国家实验室海洋生态与环境科学功能实验室 |
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| Abstract: |
| 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 together,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 50mL of offshore and open sea water. |
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