Barium isotopic analysis of geological reference materials by MC-ICP-MS

IF 3.2 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2025-03-11 DOI:10.1016/j.sab.2025.107185

Shunrong Ma , Guilin Han , Qian Zhang , Jinke Liu , Ziyang Ding , Ye Zhao

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引用次数: 0

Abstract

Barium (Ba) isotopes have been developed as a valuable tracer for chemical weathering, marine biogeochemical processes, and riverine Ba input to the ocean. To facilitate inter-laboratory data comparisons, it is essential to measure Ba isotope ratios of widely available reference materials. We presented 21 geological reference materials, most of which are new stream sediment Ba isotope reference materials in this study. Purification of synthetic solutions and rock samples with different Ba concentrations and matrix compositions, showed similar elution curves with recoveries close to 100 %. The long-term reproducibility for δ^138/134Ba measurements was ≤0.07 ‰ (2SD). The results indicated that the Ba isotope ratios of AGV-2, BCR-2, BHVO-2, GSP-2, RGM-2, GSS-2, GSR-1, GSR-2 and GSR-5 were in good agreement within analytical uncertainties with previously published data. The δ^138/134Ba values of sediment materials ranged from −0.31 ± 0.06 ‰ to 0.03 ± 0.07 ‰.With the exception of one stream sediment from a carbonate tributary, all analyzed sediment reference materials exhibited significant homogeneity in Ba isotopic composition, with an average δ^138/134Ba of 0.01 ± 0.06 ‰, which was in excellent agreement with the upper continental crust (0.00 ± 0.05 ‰) and the bulk silicate earth (0.07 ± 0.08 ‰). This dataset of reference materials in this study provides the basis for data quality assurance and later inter-laboratory comparison of Ba isotope analyses.

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来源期刊

Spectrochimica Acta Part B: Atomic Spectroscopy 物理-光谱学

CiteScore

6.10

自引率

12.10%

发文量

173

审稿时长

81 days

期刊介绍： Spectrochimica Acta Part B: Atomic Spectroscopy, is intended for the rapid publication of both original work and reviews in the following fields: Atomic Emission (AES), Atomic Absorption (AAS) and Atomic Fluorescence (AFS) spectroscopy; Mass Spectrometry (MS) for inorganic analysis covering Spark Source (SS-MS), Inductively Coupled Plasma (ICP-MS), Glow Discharge (GD-MS), and Secondary Ion Mass Spectrometry (SIMS). Laser induced atomic spectroscopy for inorganic analysis, including non-linear optical laser spectroscopy, covering Laser Enhanced Ionization (LEI), Laser Induced Fluorescence (LIF), Resonance Ionization Spectroscopy (RIS) and Resonance Ionization Mass Spectrometry (RIMS); Laser Induced Breakdown Spectroscopy (LIBS); Cavity Ringdown Spectroscopy (CRDS), Laser Ablation Inductively Coupled Plasma Atomic Emission Spectroscopy (LA-ICP-AES) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). X-ray spectrometry, X-ray Optics and Microanalysis, including X-ray fluorescence spectrometry (XRF) and related techniques, in particular Total-reflection X-ray Fluorescence Spectrometry (TXRF), and Synchrotron Radiation-excited Total reflection XRF (SR-TXRF). Manuscripts dealing with (i) fundamentals, (ii) methodology development, (iii)instrumentation, and (iv) applications, can be submitted for publication.