Optimisation of laser parameters for the analysis of sulphur isotopes in sulphide minerals by laser ablation ICP-MS

Gilbert, Sarah; Danyushevsky, Leonid V.; Rodemann, Thomas; Shimizu, N.; Gurenko, Andrey A.; Meffre, Sébastien; Thomas, Helen; Large, Ross R.; Death, David L.

doi:10.1039/c4ja00011k

Cited by 106 publications

(63 citation statements)

References 52 publications

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“…External spot error was calculated as the quadratic sum of the internal spot precision, and the standard deviation on the repeated analyses of the normalising reference material. If the MSWD ≤1, the sample is considered isotopically homogeneous within uncertainty . The MSWD of all GEMS 203 (0.75), Kovdor (0.81), and McClure (0.89) are <1, which indicates O‐isotopic homogeneity within the measurement precision.…”

Section: Discussionmentioning

confidence: 99%

Oxygen isotope homogeneity assessment for apatite U‐Th‐Pb geochronology reference materials

Yang

Xia

et al. 2019

Surface & Interface Analysis

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Secondary ion mass spectrometry (SIMS) measurement of oxygen isotopes in apatite has been employed more and more in petrogenetic, metallogenic, and climate change studies. Well‐characterised reference materials are needed due to the matrix effect, but they are yet to be well established. In this study, we conducted in‐situ oxygen isotopic and chemical analyses on six commonly used apatite reference materials (ie, Emerald, Kovdor, McClure, Mud Tank, Otter Lake, and Slyudyanka) and two in‐house apatite references (Qinghu and GEMS 203) to assess their oxygen isotope homogeneity and applicability for microbeam analyses. Our results show that all these apatite references are in general chemically homogeneous. In terms of oxygen isotopes, GEMS 203 (δ18O = 9.85 ± 0.40‰ [2SD], corrected by Durango 3), Kovdor (δ18O = 6.55 ± 0.38‰, 2SD), and McClure (δ18O = 5.94 ± 0.42‰, 2SD) are fairly homogeneous, whereas Emerald (δ18O = 10.37 ± 0.45‰, 2SD), Mud Tank (δ18O = 6.35 ± 0.46‰, 2SD), Otter Lake (δ18O = 9.71 ± 0.47‰, 2SD), Qinghu (δ18O = 5.44 ± 0.49‰, 2SD), and Slyudyanka (δ18O = 17.49 ± 0.43‰, 2SD) are less homogenous. This indicates that the former group represents better reference materials for in‐situ oxygen isotopic analyses, whilst the latter group can be used as secondary reference material for analytical quality control.

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Section: Discussionmentioning

confidence: 99%

Oxygen isotope homogeneity assessment for apatite U‐Th‐Pb geochronology reference materials

Yang

Xia

et al. 2019

Surface & Interface Analysis

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“…[2][3][4][5][6][7][8][9][10][11][12] The advantages of this technique are speed, high spatial resolution, little sample size requirements, few sample preparation procedures, reduced water-related spectral interference and avoidance of the risk of introducing contaminants by conventional chemical digestion. [1][2][3] However, quantication using non-matrix matched calibration standards is limited by the occurrence of elemental fractionation, which represents the sum of all nonstoichiometric effects that occur during the ablation process, transport and ionization in the ICP source.…”

Section: Introductionmentioning

confidence: 99%

Further investigation into ICP-induced elemental fractionation in LA-ICP-MS using a local aerosol extraction strategy

Luo

Wang

et al. 2015

J. Anal. At. Spectrom.

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The source and degree of elemental fractionation is one of the remaining challenges in LA-ICP-MS. In this study, the ICP-induced fractionation behavior of 63 elements was studied using a local aerosol extraction strategy while using a 193 nm excimer laser ablation system for sampling. We found that the sampling distance between the ablation site and the gas outlet nozzle tip positively correlated with the size of the laser ablation produced aerosol particles or agglomerates in the local aerosol extraction strategy.Therefore, the local aerosol extraction strategy allowed detailed studies of the ICP-induced fractionation behaviors for different elements. At a low makeup gas flow rate of 0.6 L min À1 (hot plasma conditions), the increase in the size of aerosol agglomerates or particles because of the increased sampling distance from 1 mm to 10 mm does not affect the ionization efficiency of the sample aerosol in ICP. In contrast, at a high makeup gas flow rate of 0.9 L min À1 , the normalized signal intensities of the elements significantly differ when the sampling distance increases from 1 mm to 10 mm. These experimental results suggest that the changes in the size of aerosol particles or agglomerates under our given conditions do not affect the transport efficiency of aerosol particles but affect the vaporization of aerosol particles in ICP. The mass load effect is more significant in the presence of large amounts of large aerosol particles and agglomerates, which deteriorates the vaporization of aerosol particles. Our experimental results also show that the sample position in the normal ablation cell affects the size of laser ablation produced aerosol particles or agglomerates. The high velocity of the carrier gas flow rate on the ablation site facilitates the production of small aerosol agglomerates or particles. To reduce the ICP-induced fractionation behaviors in LA-ICP-MS, hot plasma conditions and high velocity of the carrier gas flow rate on the ablation site are required.

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“…Cook et al (2016) [13] provide an overview of current applications of LA-ICP-MS to the trace element analysis of minerals in hydrothermal ore deposits, also noting research gaps, some of the outstanding issues, and future opportunities. The rapidly expanding capabilities of current LA-ICP-MS instrumentation, including both quadrupole and multi-collector systems, include in-situ determination of stable isotopes, and grain-scale mapping of isotopic signatures [14][15][16][17][18]. Outstanding challenges include inadequately constrained issues of down-hole fractionation, the impact of matrix effects, and concerns about how the behaviour of certain minerals during ablation may induce fractionation (e.g., [19]).…”

Section: Laser-ablation Inductively-coupled Plasma Mass Spectrometry mentioning

confidence: 99%

Advances and Opportunities in Ore Mineralogy

et al. 2017

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Abstract:The study of ore minerals is rapidly transforming due to an explosion of new microand nano-analytical technologies. These advanced microbeam techniques can expose the physical and chemical character of ore minerals at ever-better spatial resolution and analytical precision. The insights that can be obtained from ten of today's most important, or emerging, techniques and methodologies are reviewed: laser-ablation inductively-coupled plasma mass spectrometry; focussed ion beam-scanning electron microscopy; high-angle annular dark field scanning transmission electron microscopy; electron back-scatter diffraction; synchrotron X-ray fluorescence mapping; automated mineral analysis (Quantitative Evaluation of Mineralogy via Scanning Electron Microscopy and Mineral Liberation Analysis); nanoscale secondary ion mass spectrometry; atom probe tomography; radioisotope geochronology using ore minerals; and, non-traditional stable isotopes. Many of these technical advances cut across conceptual boundaries between mineralogy and geochemistry and require an in-depth knowledge of the material that is being analysed. These technological advances are accompanied by changing approaches to ore mineralogy: the increased focus on trace element distributions; the challenges offered by nanoscale characterisation; and the recognition of the critical petrogenetic information in gangue minerals, and, thus the need to for a holistic approach to the characterization of mineral assemblages. Using original examples, with an emphasis on iron oxide-copper-gold deposits, we show how increased analytical capabilities, particularly imaging and chemical mapping at the nanoscale, offer the potential to resolve outstanding questions in ore mineralogy. Broad regional or deposit-scale genetic models can be validated or refuted by careful analysis at the smallest scales of observation. As the volume of information at different scales of observation expands, the level of complexity that is revealed will increase, in turn generating additional research questions. Topics that are likely to be a focus of breakthrough research over the coming decades include, understanding atomic-scale distributions of metals and the role of nanoparticles, as well how minerals adapt, at the lattice-scale, to changing physicochemical conditions. Most importantly, the complementary use of advanced microbeam techniques allows for information of different types and levels of quantification on the same materials to be correlated.

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Optimisation of laser parameters for the analysis of sulphur isotopes in sulphide minerals by laser ablation ICP-MS

Cited by 106 publications

References 52 publications

Oxygen isotope homogeneity assessment for apatite U‐Th‐Pb geochronology reference materials

Oxygen isotope homogeneity assessment for apatite U‐Th‐Pb geochronology reference materials

Further investigation into ICP-induced elemental fractionation in LA-ICP-MS using a local aerosol extraction strategy

Advances and Opportunities in Ore Mineralogy

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