Determination of Rare Earth Elements in Pore Water Samples of Marine Sediments Using an Offline Preconcentration Method
Determination of Rare Earth Elements in Pore Water Samples of Marine Sediments Using an Offline Preconcentration Method
复制标题
离线富集法测定海洋沉积物孔隙水样品中的稀土元素
DOI：
10.1007/s00244-020-00793-0
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发表时间：
2021-01
影响因子：
4
通讯作者：
Xuefa Shi
中科院分区：
文献类型：
--
作者：
Hongna Liu;Li Li;Xiaojing Wang;Yijun Ren;Xuefa Shi
沉积物孔隙水中溶解钇和稀土元素（REY）的浓度提供了重要的地球化学信息。然而，由于REY浓度低、基质复杂、样本量有限（通常只有几毫升），对孔隙水中REY的分析往往极具挑战性。本研究建立了用乙二胺三乙酸螯合树脂离线预富集，然后电感耦合等离子体质谱法测定海洋沉积物孔隙水中溶解的REY的方法。此外，使用市售的自动微量元素预富集系统，预富集步骤可以完全自动化，节省了人工，并提供了一个更好的控制最终洗脱量。对实验条件（pH、洗脱量、洗脱酸浓度、有机络合效果）进行了评价，优选出最佳条件。特别是，有机络合效应被发现可以忽略不计。该方法对海洋沉积物孔隙水中REY元素的检测空白和检出限满意，REY元素的回收率为83 ~ 110%。然后将该方法应用于分析印度洋中部沉积物岩心（~ 30 cm）中孔隙水样品的溶解REY浓度。REY的垂直分布、溶解REY浓度和平均后太古代澳大利亚页岩归一化模式与先前发表的孔隙水REY数据相似。该方法为海洋孔隙水样品中所有15种REY的分析提供了一种准确而简便的方法，样品体积仅为~ 5ml。
The concentrations of dissolved yttrium and rare earth elements (REY) in sediment pore water provide important geochemical information. However, due to the low REY concentration, complex matrix, and limited sample volume (often only a few milliliters), analysis of the REY in pore water often is highly challenging. In this study, a method was established to determine the dissolved REY in pore water of marine sediments using an offline preconcentration step with the ethylenediaminetriacetate chelating resin, followed by inductively coupled plasma-mass spectrometry. In addition, using a commercially available automated trace-element preconcentration system, the preconcentration step can be fully automated, saving labor and providing a better control of the final elution volume. The experimental conditions (pH, elution volume, elution acid concentration, and organic complexation effect) were assessed, and the optimal conditions were chosen. In particular, the organic complexation effect was found to be negligible. The procedure blank and limit of detection were satisfactory for studying REY in pore water of marine sediments, and the method also yielded satisfactory recoveries for the REY elements (83–110%). The method was then applied to analyze the dissolved REY concentrations of pore water samples collected in a sediment core (~ 30 cm) in the central Indian Ocean. The vertical distribution, dissolved REY concentration, and the average Post Archean Australian Shale-normalized pattern of the REY showed similarities to the previously published pore water REY data. This method provides an accurate yet facile approach for the analysis of all 15 REY in marine pore water samples using the sample volume of only ~ 5 mL.
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影响因子：
3
作者：
Haley, BA;Klinkhammer, GP
通讯作者：
Klinkhammer, GP
影响因子：
1.6
作者：
Intae Kim;Seolwon Kim;Guebuem Kim
通讯作者：
Intae Kim;Seolwon Kim;Guebuem Kim
影响因子：
5
作者：
G. Klinkhammer;H. Elderfield;J. Edmond;A. Mitra
通讯作者：
G. Klinkhammer;H. Elderfield;J. Edmond;A. Mitra
影响因子：
3.4
作者：
T. Rousseau;J. Sonke;J. Chmeleff;F. Candaudap;F. Lacan;G. Boaventura;P. Seyler;C. Jeandel
通讯作者：
T. Rousseau;J. Sonke;J. Chmeleff;F. Candaudap;F. Lacan;G. Boaventura;P. Seyler;C. Jeandel
影响因子：
5
作者：
MILLERO, FJ
通讯作者：
MILLERO, FJ