Sequential extraction of U, Th, Ce, La and some heavy metals in sediments from Ortigas river, Spain.
Sequential extraction of U, Th, Ce, La and some heavy metals in sediments from Ortigas river, Spain.
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DOI：
10.1016/s0039-9140(97)00374-3
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发表时间：
1998-08
期刊：
影响因子：
6.1
通讯作者：
R. Martín;D. M. Sánchez;A. Gutiérrez
中科院分区：
文献类型：
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作者：
R. Martín;D. M. Sánchez;A. Gutiérrez
采用欧盟标准测量和测试计划（BCR）的三步连续提取法（SEP），对两个沉积物样品中U、Th、Ce、La、Cu、Cr、Ni和Zn的提取态含量进行了分析。为了进行质量平衡，包括第四步，即消化第三提取步骤的残留物。采用电感耦合等离子体原子发射光谱法（ICP-AES）同时测定铜、铬、镍、锌、钍、铈和镧。由于ICP-AES分析铀的灵敏度不足，因此采用ICP-MS测定该元素。由于基质效应，需要标准加入法。最后，SEP被应用到奥尔蒂加斯河沉积物，表明大多数的元素被发现主要与残留的沉积物部分，除了铀，这被发现作为一个可交换的物种在其总含量的约60%。回收率为86-108%。
The extractable contents of U, Th, Ce, La, Cu, Cr, Ni and Zn in two sediment samples collected from the Ortigas river have been analysed using the three step sequential extraction procedure (SEP) described by BCR, Community Bureau of Reference (now Standards Measurements and Testing Programme) of the European Union. In order to perform a mass balance, a fourth step has been included, i.e. digestion of the residue from the third extraction step. ICP-AES was used for the determination of Cu, Cr, Ni, Zn, Th, Ce and La. Because of the inadequate sensitivity of ICP-AES for the analysis of uranium, ICP-MS was used for the determination of this element. Standard addition method was required, because of the matrix effects. Finally, SEP was applied to the Ortigas river sediments, showing that most of the elements were found mainly associated with the residual sediment fraction, except for uranium, which was found as an exchangeable species in approximately 60% of its total content. Recoveries of 86–108% have been obtained.