| 多接收电感耦合等离子体质谱仪测定沉积物中Cu和Zn同位素 |
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| 引用本文： | 何连花，刘季花，张颖，等. 多接收电感耦合等离子体质谱仪测定沉积物中Cu和Zn同位素[J]. 海洋学报，2022，44(3)：70–80 doi: 10.12284/hyxb2022009 |
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| 作者姓名： | 何连花 刘季花 张颖 高晶晶 朱爱美 汪虹敏 |
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| 作者单位： | 1.自然资源部第一海洋研究所, 山东 青岛 266061;;2.自然资源部海洋地质与成矿作用重点实验室，山东 青岛 266061;;3.青岛海洋科学与技术试点国家实验室 海洋地质过程与环境功能实验室，山东 青岛 266237 |
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| 基金项目： | 山东省自然科学基金（ZR2014DP009）； |
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| 摘 要： | 本文介绍了海洋沉积物中Cu和Zn同位素的化学预处理及测定方法，报道了冲绳海槽20件表层沉积物和5件柱状沉积物样品的Cu和Zn同位素组成。采用大孔径阴离子交换树脂AG MP-1M，分别以8.2 mol/L HCl+0.01%HF+0.001%H2O2、2 mol/L HCl+0.001%H2O2和0.5 mol/L HNO3作为淋洗液，能有效分离海洋沉积物中的基质元素和Cu、Zn元素，且Cu和Zn的回收率均接近100%。以内标法和标准−样品−标准法联合校正多接收电感耦合等离子体质谱仪的质量歧视，δ65Cu和δ66Zn的分析精度分别为0.11‰和0.09‰（2SD）。冲绳海槽表层沉积物δ66Zn分布范围为0.07‰～0.67‰，δ66Zn平均值为0.31‰±0.32‰（2SD）；δ65Cu的分布范围为−2.26‰～−0.52‰，δ65Cu平均值为−1.21‰±0.55‰（2SD）。表层沉积物δ66Zn和δ65Cu分布范围较大，柱状沉积物样品δ66Zn和δ65Cu值随深度存在较显著变化。
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| 关 键 词： | Cu同位素 Zn同位素 多接收电感耦合等离子体质谱 海洋沉积物 冲绳海槽 |
| 收稿时间： | 2021-01-08 |
| 修稿时间： | 2021-06-04 |
Determination of Cu and Zn isotopes in sediments by multi-collector inductively coupled plasma mass spectrometer |
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| He Lianhua，Liu Jihua，Zhang Ying , et al. Determination of Cu and Zn isotopes in sediments by multi-collector inductively coupled plasma mass spectrometer[J]. Haiyang Xuebao，2022, 44(3)：70–80 doi: 10.12284/hyxb2022009 |
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| Authors: | He Lianhua Liu Jihua Zhang Ying Gao Jingjing Zhu Aimei Wang Hongmin |
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| Affiliation: | 1. First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China;;2. Key Laboratory of Marine Geology and Metallogeny, Ministry of Natural Resources, Qingdao 266061, China;;3. Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China |
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| Abstract: | We presented an optimized and purification procedure as well as an analytical method for Cu and Zn isotopes measurement in marine sediments. We reported Cu and Zn isotope of 5 samples in a sediment cores and 20 surface sediment samples in the northern and southern Okinawa Trough. Anion exchange resin (AG MP-1M) was applied to separate matrix elements of sediment samples from Cu, Fe and Zn using 8.2 mol/L HCl+0.01% HF+0.001% H2O2, 2 mol/L HCl+0.001% H2O2 and 0.5 mol/L HNO3 as eluents. The recoveries of Cu and Zn were both close to 100%. Cu and Zn isotopes were measured on a Nu Plasma multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS). Instrumental mass bias was corrected using a combination of sample-standard bracketing and internal spiking. The long-term reproducibilities were 0.11‰ (2SD) for Cu isotopes and 0.09‰ (2SD) for Zn isotopes. The δ66Zn of surface sediments varies from 0.07‰ to 0.67‰, with an average of 0.31‰ ± 0.32‰ (2SD); the δ65Cu of surface sediments ranges from −2.26‰ to −0.52‰, with an average of −1.21‰ ± 0.55‰ (2SD). The results show that Cu and Zn isotopes of surface sediments in the Okinawa Trough varies widely, meanwhile, Cu and Zn isotopes in sediment core varies with depth. |
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| Keywords: | Cu isotopes Zn isotopes multi-collector inductively coupled plasma mass spectrometer marine sediments Okinawa Trough |
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