High-precision CopperandZinc Isotopic Measurements in Igneous RockStandards UsingLarge-geometry MC-ICP-MS

Zhu, Yuhang; Li, Ming; Wang, Zaicong; Zou, Zongqi; Hu, Zhaochu; Liu, Yongsheng; Zhou, Lian; Chai, Xin‐Sheng

doi:10.46770/as.2019.06.002

Cited by 22 publications

(33 citation statements)

References 21 publications

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“…Fe isotopic measurements were performed using a Nu Plasma 1700 MC-ICP-MS (Nu Instruments, Wrexham, UK) at the State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, China. This instrument is a large-geometry, double-focusing, multi-collector ICP-MS. 39,40 The natural dispersion of the instrument is approximately 1700 mm, which is more than thrice that of other general-sized MC-ICP-MS instruments. The unique design of high dispersion and large geometry allows a high mass resolution of >5000 (10% valley) while maintaining a flat-top peak.…”

Section: Methodsmentioning

confidence: 94%

“…16 In contrast, Nu Plasma 1700 (Nu Instrument, Wrexham, UK) is a unique, large-geometry highresolution MC-ICP-MS system that provides ultrahigh mass resolution to allow the complete separation of polyatomic interfering ions. 39,40 Nu Plasma 1700 was tuned to achieve a full baseline separation of the Fe and ArN/O peaks, increasing the accuracy and precision of the results. 28,41 In this study, based on the ultrahigh mass resolution of Nu Plasma 1700 MC-ICP-MS, the polyatomic interferences of Fe isotopes were measured in detail.…”

Section: Introductionmentioning

confidence: 99%

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Iron Isotopic Measurement Using Large-Geometry High-Resolution Multi-Collector Inductively Coupled Plasma Mass Spectrometer

Li¹

2022

At.Spectrosc.

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High-precision and accurate Fe isotopic analyses are essential for various geological processes. In this study, Fe isotopic measurements were optimized on a large-geometry, high-resolution Nu Plasma 1700 MC-ICP-MS instrument, which can distinguish Ar-related interferences completely as opposed to other general-sized MC-ICP-MS instruments. Under the conditions of high mass resolution, complete separation of Ar-related interference can be achieved. We evaluated the type and intensity of all Ar-related interferences. The effects of the acid molarity, concentration mismatch, residual HCl, and matrix elements were also evaluated. The results demonstrate that the molarity of the acid, residual HCl, and Cr significantly affected the precision of the Fe isotopic measurements. Fe was purified by one-step column anion-exchange separation using the anion resin AG-MP-1M. The long-term external precisions of δ 56 Fe and δ 57 Fe were greater than ± 0.03‰ (2SD) and ± 0.06‰ (2SD), respectively. The Fe isotopic compositions of the five geological reference materials measured in this study agreed with previously published data, within uncertainties.

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Section: Methodsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Iron Isotopic Measurement Using Large-Geometry High-Resolution Multi-Collector Inductively Coupled Plasma Mass Spectrometer

Li¹

2022

At.Spectrosc.

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“…Copper isotope ratios were determined by the standard‐sample bracketing method using a Neptune plus MC‐ICP‐MS instrument at the Isotope Geochemistry Laboratory of the China University of Geosciences, Beijing and Wuhan Sample Solution Analytical Technology Co., Ltd, Wuhan (WSSAT). Detailed procedures of sample digestion, column chemistry and instrumental analysis in both labs are the same, following the procedures in previous works (Liu, Li, et al., 2014; Zhu et al., 2019). Only a simple description is presented below.…”

Section: Methodsmentioning

confidence: 99%

Copper Isotopic Fractionation During Seafloor Alteration: Insights From Altered Basalts in the Mariana and Yap Trenches

Guo

Tian

Liu³

et al. 2022

JGR Solid Earth

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To further investigate copper (Cu) isotopic fractionation during seawater‐oceanic crust interactions, 13 subsamples across a basalt altering section and 12 bulk‐rock basalts from the southern Mariana and Yap trenches, western Pacific Ocean, were studied. We find that the δ65Cu values of the basalt section roughly increase from mid‐ocean ridge basalt‐like values (0.04% – 0.10%) in the core to higher values (up to 0.20%) near the core‐rim interface, and then lower values (down to −0.17%) at the rims. Isotopically light rims reflect the initial dissolution of Cu‐bearing sulfides releasing isotopically heavy Cu into ambient seawater, consistent with both lower Cu and sulfide contents in the altered rims. The elevated δ65Cu values reveal that sulfide dissolution induced a concentration‐driven diffusion from the core to rims, controlling the rim‐core‐rim Cu content and isotopic variations on centimeter scale. By contrast, the δ65Cu values of bulk‐rock basalts show a wide range (0.02% – 0.56%) with most samples enriched in heavy isotopes, and negatively correlate with Cu concentrations, indicating preferential adsorption of isotopically heavy Cu from seawater. We propose that chemical diffusion occurred prior to any adsorption processes, suggesting that a three‐stage process involving sulfide dissolution, chemical diffusion and adsorption controls Cu isotopic fractionation during seafloor basalt alteration.

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“…Within the past decades, the applications of the metal isotopes have received increasing attention in earth sciences and environmental sciences because these isotope ratios contain valuable information on geochronology and sources/processes. , With the rapid progresses in this emerging field, the demand for the analysis of metal isotopes has increased significantly. The current multiple collectors inductively coupled plasma mass spectrometer and thermal ionization mass spectrometer are typically operated with an automated sample analysis process, which can achieve relatively efficient and fast sample analysis. − However, chemical separation and purification of the target element from the matrix are prerequisites to achieve high precision isotope analysis. − It is laborious, time-consuming, and requires experienced and highly qualified personnel skills, which greatly limits the efficiency of current metal isotope analysis. Therefore, a high-throughput automatic sample purification system is highly required to effectively exploit new applications of radiogenic and non-traditional stable isotopes.…”

Section: Introductionmentioning

confidence: 99%

Development of an Automatic Column Chromatography Separation Device for Metal Isotope Analysis Based on Droplet Counting

Zhou

Miao

et al. 2021

Anal. Chem.

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A novel, simple, cost-effective, reliable, and practical automatic column chromatography separation device capable of simultaneously purifying samples for radiogenic and non-traditional stable isotope analysis has been developed. The device avoids the use of any pump and features eluent driving by the siphon effect (gravity) and quantitative control by infrared droplet counting. Several factors affecting the control of droplets were investigated, including types and concentrations of eluents and the height of the liquid level. Results showed that accurate dripping of the eluent could be readily achieved by controlling the number of droplets under selected conditions. The separation performance of the device was first demonstrated by the elution of Sr and Cd in synthetic matrix solutions. The recoveries of Sr and Cd samples were better than 87.6 and 95.0%, respectively, and the whole procedure blank was about 0.3 ng for Sr and 0.1 ng for Cd. Finally, the reliability of the device was further validated by the purification of Sr and Cd from different geological reference materials (NIST 2711a, Nod-A-1, BCR-2, and BHVO-2). The determined Cd and Sr isotope values agree well with their reference values within the uncertainty range. All these results clearly demonstrate the reliability and practicability of the proposed device, which provides a promising method for the automated purification of isotope samples.

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High-precision CopperandZinc Isotopic Measurements in Igneous RockStandards UsingLarge-geometry MC-ICP-MS

Cited by 22 publications

References 21 publications

Iron Isotopic Measurement Using Large-Geometry High-Resolution Multi-Collector Inductively Coupled Plasma Mass Spectrometer

Iron Isotopic Measurement Using Large-Geometry High-Resolution Multi-Collector Inductively Coupled Plasma Mass Spectrometer

Copper Isotopic Fractionation During Seafloor Alteration: Insights From Altered Basalts in the Mariana and Yap Trenches

Development of an Automatic Column Chromatography Separation Device for Metal Isotope Analysis Based on Droplet Counting

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