海水中钕同位素的测定及其在水团混合中的指示意义

引用本文: 车宏, 张劲, 赵志琦, 何会军. 海水中钕同位素的测定及其在水团混合中的指示意义[J]. 分析化学, 2018, 46(9): 1393-1399. doi: 10.11895/j.issn.0253-3820.171172 shu

Citation: CHE Hong, ZHANG Jing, ZHAO Zhi-Qi, HE Hui-Jun. Measurement of Neodymium Isotope in Seawater and Its Significance in Mixing of Water Masses[J]. Chinese Journal of Analytical Chemistry, 2018, 46(9): 1393-1399. doi: 10.11895/j.issn.0253-3820.171172 shu

海水中钕同位素的测定及其在水团混合中的指示意义

车宏 ^1, ,
张劲 ^1,2, ,
赵志琦 ^3, ,
何会军 ^1,

1.
中国海洋大学化学化工学院海洋化学理论与工程技术教育部重点实验室, 青岛 266061;
2.
日本国立富山大学理学部生物圈环境科学科, 日本富山 9308555;
3.
中国科学院地球化学研究所环境地球化学国家重点实验室, 贵阳 550081
基金项目:
本文系国家自然科学基金项目（Nos.41530965，41276071）资助

摘要: 海水中的钕（Nd）同位素性质稳定，被广泛用于海洋学过程的研究。由于海水中Nd含量很低，且在测定过程中易受钐（Sm）的影响，因此富集和纯化成为海水中Nd同位素分析的必要步骤。传统的分离方法通常是利用氢氧化铁共沉淀法富集海水中的稀土元素（REEs），再用LN-C50-A树脂对Nd进行分离纯化。但富集过程较为耗时。本研究采用NOBIAS螯合树脂对海水中的稀土元素进行富集，优化了上样pH值、NOBIAS PA1螯合树脂淋洗酸浓度、LN-C50-A树脂淋洗酸体积等实验条件。结果表明，当pH=4.7时，NOBIAS PA1螯合树脂对钕的回收效率大于99%；LN-C50-A树脂对钕分离纯化的回收效率大于93%。本方法重现性好（RSD < 1.5%，n=3），且系统误差对钕同位素的测定无显著影响（RSD < 5%，n=5），能满足海水中钕及其同位素分析精度的要求。

关键词:

English

Measurement of Neodymium Isotope in Seawater and Its Significance in Mixing of Water Masses

1.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266061, China;
2.
Earth and Environmental System, Graduate School of Science and Engineering, University of Toyama, Toyama 9308555, Japan;
3.
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, China Academy of Sciences, Guiyang 550002, China
Received Date: 26 August 2017
Revised Date: 26 June 2018
Fund Project:
This work was supported by the National Natural Science Foundation of China (Nos. 41530965, 41276071).

Abstract: Neodymium (Nd) isotopes are widely used for oceanographic processes because of its stable properties in nature. Due to the low concentration of Nd in the seawater, pre-separation and enrichment are necessary in the analysis of Nd isotopes. The traditional separation method usually uses co-precipitation with hydrous Fe oxide to separate rare earth elements (REEs), and LN resin to separate and purify Sm and Nd, respectively. But the concentration process is time-consuming. In this work, a concentration method for REEs in seawater was developed on the basis of NOBIAS resin. The experimental conditions of this method, such as the range of pH, elution acid concentration of NOBIAS resin, and elution acid volume for LN -C50-A resin were optimized. The results indicated that, at pH 4.7, the recovery of Nd was about 99% when pre-concentrated with NOBIAS resin and the recovery of Nd was over 93% when purified with LN-C50-A resin. The method showed an excellent experimental reproducibility (RSD<1.5%; n=3) and a very low systematic error (RSD<5%, n=5) in the determination of Nd and its isotope.

Key words:

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海水中钕同位素的测定及其在水团混合中的指示意义

English

Measurement of Neodymium Isotope in Seawater and Its Significance in Mixing of Water Masses

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

海水中钕同位素的测定及其在水团混合中的指示意义

English

Measurement of Neodymium Isotope in Seawater and Its Significance in Mixing of Water Masses

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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