Article
Geochemistry & Geophysics
Nasser A. Zirakparvar, Benjamin T. Manard, Cole R. Hexel, Daniel R. Dunlap
Summary: In this study, the behavior of the Lu-Yb-Hf system during laser ablation and solution-based analyses was assessed using the recently released Neoma (TM) platform. The primary focus was on characterizing the Yb interference correction, which is an important issue in Hf isotope analysis. The results showed that high signal intensity analyses produced accurate and precise data, while an empirical approach was effective in obtaining accurate results with low Yb signals.
Article
Spectroscopy
Hong Liu, Wen Zhang, Zhengbin Deng, Zhaochu Hu, Martin Schiller, Martin Bizzarro, Yongsheng Liu, Tao Luo, Yantong Feng, Lanping Feng
Summary: A new method using fs-LA-MC-ICP-MS has been developed to determine the Ti isotope fractionation of rutiles with high precision and spatial resolution. By optimizing laser parameters and using wet plasma conditions, accurate δ49Ti results with spatial resolutions of 10 μm and approximately 4 μm can be obtained.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Anthropology
Christopher D. Standish, Stephen W. Merkel, Yu-Te Hsieh, Jane Kershaw
Summary: A new approach for simultaneous analysis of lead isotope ratios and gold, lead, and bismuth concentrations in metallic silver is introduced using nanosecond laser ablation multi-collector inductively-coupled plasma mass spectrometry (LA-MC-ICP-MS). The method is validated by repeat analyses of silver reference materials and shows high accuracy and reproducibility. Additionally, the method is successfully applied to the analysis of Islamic silver dirhams from a specific mint, demonstrating its potential for geochemical studies of archaeological artifacts.
JOURNAL OF ARCHAEOLOGICAL SCIENCE
(2021)
Article
Geochemistry & Geophysics
Yogita Kadlag, Michael Tatzel, Daniel A. Frick, Harry Becker, Philipp Kuehne
Summary: Chondrules in undifferentiated meteorites are silicate melt droplets with variable texture and composition. Si isotope ratios and element compositions of chondrules in the Allende CV3 chondrite were determined to understand the formation mechanisms and conditions, suggesting that chondrules and matrix likely formed in nebular settings rather than by asteroid impacts.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Zhaoping Yang, Simon Edward Jackson, Thomas Skulski
Summary: The study investigated the suitability of four Cu metal materials as reference materials for Cu isotope analysis by LA-MC-ICP-MS. The results showed that these materials are isotopically homogeneous and suitable for calibration and quality control of in situ and solution nebulization Cu isotope analyses of Cu.
FRONTIERS IN CHEMISTRY
(2021)
Article
Geochemistry & Geophysics
Martin Guitreau, Abdelmouhcine Gannoun, Zhengbin Deng, Marc Chaussidon, Frederic Moynier, Bernard Barbarin, Johanna Marin-Carbonne
Summary: This study investigates the silicon isotope signatures of zircon in various granite types to understand their fractionation behavior, which can be useful in studying magma evolution and identifying granite source areas. Silicon isotope ratios in zircon can track changes in magma temperature and composition, revealing complex processes like magma mingling, fractional crystallization, and multiple sources. The study highlights that silicon isotopes in zircon can complement existing techniques in granite studies and should not be used in isolation.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Spectroscopy
Yvtian Lei, Ming Li, Zaicong Wang, Yangtao Zhu, Zhaochu Hu, Yongsheng Li, Xinna Chai
Summary: High-precision Fe isotopic analyses were optimized using a large-geometry, high-resolution Nu Plasma 1700 MC-ICP-MS instrument that can completely distinguish Ar-related interferences. The effects of various factors on Fe isotopic measurements were evaluated, and it was found that acid molarity, residual HCl, and Cr significantly affected the precision.
ATOMIC SPECTROSCOPY
(2022)
Article
Geochemistry & Geophysics
Tianli Zhang, Jia Liu, Qun Zhang, Yingnan Zhang, Liping Qin
Summary: This study presents high-precision W isotopic measurement results using the W-180-W-183 double spike technique. The effects of isobaric and polyatomic interferences on the measurement were evaluated. The study found that the measurement results were not significantly affected by certain elements when their concentrations were below certain thresholds. The measurement precision of standard solutions and geological reference materials were within an acceptable range. Additionally, the study compared the W isotopic compositions of two major tungsten ore minerals, providing a new tool for studying hydrothermal mineralisation processes and the W cycle of geological reservoirs.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2023)
Review
Environmental Sciences
Kaj V. Sullivan, James A. Kidder, Tassiane P. Junqueira, Frank Vanhaecke, Matthew I. Leybourne
Summary: Copper isotopic analysis plays a crucial role in studying geochemical and biological processes, providing detailed information that cannot be obtained with copper concentrations alone. It can be used as a vector in mineral exploration, tracer of metal contaminants in the environment, biomonitor, and diagnostic marker of diseases.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Geochemistry & Geophysics
Fang Liu, Mingxing Ling, Zhaofeng Zhang, Wenning Lu, Jianbing Xu, Xin Li, Di Yang, Jiaojiao Wu, Hong Yang
Summary: This study reports stable cerium (Ce) isotopic compositions of terrestrial rocks and investigates Ce isotopic fractionation during column chemistry. The Ce isotopes were separated using a single-stage extraction technique and measured using a Thermo Scientific Neptune Plus MC-ICP-MS. Data accuracy and precision were examined by two different laboratories.
Article
Spectroscopy
Xiaoqiang Li, Guilin Han, Qian Zhang, Rui Qu, Zhuang Miao
Summary: Lithium isotopes are useful for tracking the evolution of continental silicate weathering and maintaining Earth's long-term climate stability. A new optimization of dual-column chromatography allows for high precision determination of lithium isotope ratios in various geological samples. The method has been shown to be reproducible and reliable.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2022)
Article
Physics, Atomic, Molecular & Chemical
N. Alex Zirakparvar, Benjamin Manard, Cole Hexel, Daniel Dunlap, Shalina Metzger, Debbie Bostick, Veronica Bradley, Brian Ticknor
Summary: This study utilized an all-faraday cup detector configuration on the Neoma MC-ICP-MS for uranium isotope ratio determinations. The results demonstrate that the all-faraday cup method can produce highly precise and accurate isotope ratios even at low signal intensity levels. The study also investigated the impact of different amplifier resistor levels and integration times on the precision and accuracy of the measurements.
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
(2023)
Article
Geochemistry & Geophysics
Deze Liu, Frederic Moynier, Paolo A. Sossi, Raphael Pik, Saemundur Ari Halldorsson, Edward Inglis, James M. D. Day, Julien Siebert
Summary: Indium (In) behaves as a moderately volatile metal during nebular and planetary processes and its volatility depends on oxygen fugacity. Accurately determining the isotopic composition of In in silicate Earth is challenging due to its low abundance in rocks and significant isobaric interferences. This study presents a purification procedure for In and reports the first dataset of its isotopic compositions in terrestrial igneous rocks, showing no significant variation between different types of basalts. The average δ115In of 0.35‰ (2SD) in basalts represents the best estimate of the In isotopic composition of the mantle and the bulk silicate Earth.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Biochemical Research Methods
Shichao An, Xianglong Luo, Weiqiang Li
Summary: Stable K isotope geochemistry is becoming an important tool for various applications. The development of analytical methods based on multicollector inductively coupled plasma mass spectrometry (MC-ICP-MS) without collision cell allows for the analysis of K isotopes in many existing labs. A robust high-precision K isotope analytical method has been developed, which can be used for studying K isotopic variations in geological, cosmochemical, and biological samples.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2022)
Article
Geochemistry & Geophysics
Katrin Weber, Michael Weber, Martina Menneken, Anna G. Kral, Regina Mertz-Kraus, Thorsten Geisler, Jochen Vogl, Thomas Tuetken
Summary: Experimental alteration of dental tissues from modern African elephants reveals that temperature and acidity can affect isotope ratios and element distribution in teeth, with enamel being more resistant to changes compared to dentin.