Geostandards and Geoanalytical Research最新文献

{"title":"A Comparison of Bulk with Micro-Volume Elemental Values for NIST SRM 610 and NIST SRM 612","authors":"Nicholas Sharp,&nbsp;Maria Vega Martinez,&nbsp;Ruthmara Corzo,&nbsp;Blaza Toman,&nbsp;Rick Paul,&nbsp;Savelas Rabb,&nbsp;Jack Prothero,&nbsp;Jamie L. Weaver","doi":"10.1111/ggr.12615","DOIUrl":"https://doi.org/10.1111/ggr.12615","url":null,"abstract":"<p>NIST SRM 610 and 612 (Trace Elements in Glass) are routinely used for microanalytical measurements but were designed to be bulk-scale reference materials. This study investigates an approach to quantify the differences between values for elements obtained using the bulk techniques ICP-OES, INAA and CNPGAA, and values obtained using the predominant microanalytical technique LA-ICP-MS. The results from bulk techniques and LA-ICP-MS were also compared with currently accepted mass fractions reported in the Certificates of Analysis (CoA) and the literature. The element suite measured was based on the needs of the forensic and geological microanalysis communities, and included B, Ce, Hf, K, La, Li, Ti and Zr. These additional elements are either not included or do not have uncertainty values in the CoAs for NIST SRMs 610 and 612 but are available as community consensus values, which include uncertainties. The measurement results were processed using Monte Carlo (MC) uncertainty analysis for each technique to provide a comprehensive calculation of expanded uncertainties for use in future research. Measurements of mass fractions of the same element both within and between fragments in the LA-ICP-MS data were observed to be correlated due to the use of only one calibration material, which was Float Glass Standard (FGS) 2, as that reference material is not directly traceable to NIST SRMs 610 and 612, and is predominantly used in the forensic community. The MC treatment was expected to cause increases in the overall uncertainty values compared with traditional Guide to the Expression of Uncertainty in Measurement (GUM) treatment for all measurements, which was the case for LA-ICP-MS measurements of all elements in NIST SRM 610 and NIST SRM 612 (except for Mn in NIST SRM 610). However, for bulk measurements of Ce, Li and Rb in NIST SRM 610, and bulk measurements of Li, Mn, Ti and Zr for NIST SRM 612, the uncertainty decreased due to MC more precisely determining the uncertainty contribution compared with a more conservative approximation from GUM. All results were compared by using <i>E</i>_<i>n</i> scores to assess the relative agreement between bulk- and micro-scale measurements, CoA values and to community consensus values. The findings point out the limitations of the current forensic glass reference materials for high precision microanalytical measurements, especially due to the relatively high uncertainty values associated with Float Glass Standard (FGS) 2. This situation underscores the need for new reference materials specifically designed for homogeneity at the micro-scale for trace element measurement.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 4","pages":"781-798"},"PeriodicalIF":3.4,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145479997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Separate Determination of Strontium and Barium Mass Fractions in Calcite and Dolomite in Carbonate Rocks by a Multi-step Sequential Leaching Procedure","authors":"Kaiyu Wu,&nbsp;Yuichiro Ueno,&nbsp;Jakub Surma,&nbsp;Chiyori Nakajo","doi":"10.1111/ggr.70002","DOIUrl":"https://doi.org/10.1111/ggr.70002","url":null,"abstract":"<p>Trace element partitioning in carbonate minerals has shown potential in palaeoenvironment reconstruction, while one of its preconditions of application – the respective extraction of trace element mass fractions in diverse mineral phases in carbonate rocks – leaves room for methodological improvement. We tested a ten-step sequential leaching method to selectively dissolve and extract calcite and dolomite based on their different reactivities to dilute acetic acid, with a focus on strontium and barium release. A group of mineral samples and a group of rock samples were selected for the experiment. The constant release of Sr from both calcite and dolomite mineral samples indicates its uniform distribution in the two carbonate minerals, which is consistent with prior conclusions that Sr is incorporated in the carbonate lattice, substituting for Ca. For carbonate rocks, the Sr and Ba contents present linear correlations with the ratio of calcite and dolomite, as well as Ca/(Mg+Ca) ratio dissolved in each leaching step, suggesting that the determination of their mass fractions in the two minerals can be achieved by regression. Although the Ba abundance in mineral samples is similar to that of Sr, its pattern of release from rock sample powder shows significant non-carbonate contributions. Based on the results of the sequential leaching, we design a multi-step procedure for the separate extraction of Sr and Ba in calcite and dolomite, and a case study is conducted to demonstrate its applicability, the results of which show a significantly lower Ba content in the carbonate minerals compared with bulk Ba concentrations, emphasising the importance of being cautious when using element abundances in carbonate rocks to reconstruct geochemical properties of the palaeoenvironment.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 4","pages":"751-769"},"PeriodicalIF":3.4,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.70002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145479872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of Two Methods for Determination of Rhenium and Platinum-Group Elements in Meteorites Using On-Line and Off-Line Matrix Separation Modes","authors":"Yuling Zeng,&nbsp;Guiqin Wang,&nbsp;Thomas C. Meisel","doi":"10.1111/ggr.70001","DOIUrl":"https://doi.org/10.1111/ggr.70001","url":null,"abstract":"<p>The abundances of rhenium (Re) and platinum-group elements (PGE) and their variation patterns provide crucial insights into the evolution of planetary bodies, including the Moon. The objective of this study is to evaluate the applicability of the Carius tube and HPA-S digestion methods, as well as online and offline separation and detection techniques, for determining the mass fractions of Re and PGE in meteorites. The findings demonstrated that HPA-S is capable of completely dissolving refractory minerals and is a more effective dissolution method for meteorite samples than the Carius tube approach. The combination with cation exchange resin and online matrix separation allows for complete control over interfering elements, making it particularly promising for analysing extraterrestrial samples with high Zr/Pd ratios, such as Martian meteorites and lunar rocks. However, it was observed that PEEK tubing adsorbs Pd and Pt ions, resulting in significantly reduced recoveries of these elements during chromatographic separation. Therefore, the use of PEEK during chromatographic separation is not recommended. The optimised measurement procedure was validated using PGE reference materials OKUM, GPt-3 and UMT-1, and the resulting measurement values were found to agree with the literature values.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 4","pages":"737-750"},"PeriodicalIF":3.4,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.70001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145480158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three Spodumene Reference Materials for Oxygen Isotope Measurement by Ion Microprobe","authors":"Andreas T. Hertwig,&nbsp;Johannes Chischi,&nbsp;Axel K. Schmitt,&nbsp;Hans C. Oskierski,&nbsp;Kai Rankenburg,&nbsp;Martin Wells,&nbsp;Benita Putlitz,&nbsp;Zakaria Quadir","doi":"10.1111/ggr.70003","DOIUrl":"https://doi.org/10.1111/ggr.70003","url":null,"abstract":"<p>This study reports on the development of three spodumene reference materials referred to as Curtin University (CU) Tri-1, Kun-A-1 and MG-1 for calibrating the instrumental mass fractionation for oxygen isotope measurement by secondary ionisation mass spectrometry (SIMS). Millimetre-sized fragments were prepared from gem-quality spodumene crystals with chemical compositions close to the ideal spodumene end member (LiAlSi₂O₆). From these fragments, six subsamples were extracted for laser fluorination isotope ratio mass spectrometry (LF-IRMS) to determine the bulk oxygen isotope ratio of the three materials and confirm their homogeneity on the mg scale. The bulk δ¹⁸O (VSMOW) values are 11.29 ± 0.04‰, 9.12 ± 0.10‰ and 15.13 ± 0.08‰ (all 2SE, standard error of the mean) for materials Tri-1, Kun-A-1 and MG-1, respectively. A random selection of twenty or more fragments from each material was subjected to SIMS analysis. Repeatability of SIMS δ¹⁸O measurements was at most 0.24‰ (2<i>s</i>), indicating oxygen isotopic homogeneity on the ng scale. Crystal orientation effects potentially affecting SIMS analysis were systematically evaluated and found to be absent at levels equivalent to the repeatability of the method. Applications of the new materials lie mainly in furthering research on pegmatite formation and tracing of raw materials by providing the means for accurate, <i>in situ</i> oxygen isotope measurement in spodumene.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 4","pages":"857-869"},"PeriodicalIF":3.4,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.70003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145479849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New Sulfur Measurement Results for Geological Reference Materials Obtained via Various Pre-treatment Methods","authors":"Wataru Fujisaki,&nbsp;Teruyuki Maruoka,&nbsp;Yoshiaki Endo,&nbsp;Yusuke Sawaki,&nbsp;Yohei Matsui","doi":"10.1111/ggr.70000","DOIUrl":"https://doi.org/10.1111/ggr.70000","url":null,"abstract":"<p>Total sulfur (TS), chromium-reducible sulfur (CRS) and HCl-insoluble sulfur (HCl-insoluble S) contents (mass fractions), together with their δ³⁴S_TS, δ³⁴S_CRS and δ³⁴S_{HCl-insoluble S} values were measured in marine, stream and lacustrine geological reference materials (RMs). These were JMs-1, JMs-2, SBC-1, SCo-2, JSd-3, JSd-4 and JLk-1, which include modern surface and ancient sediments. Using these data, the mechanisms for driving sulfur isotopic distinctions between the δ³⁴S_TS, δ³⁴S_CRS and δ³⁴S_{HCl-insoluble S} values were systematically investigated. Detectable amounts of acid volatile sulfur were not found in all analysed RMs. On the other hand, sulfate in the analysed RMs was found to have the heaviest δ³⁴S values compared with other sulfur species, such as elemental sulfur, pyrite and organic sulfur, which is consistent with expectation, based on sulfur oxidation numbers. The most notable finding is that differences between δ³⁴S_CRS and δ³⁴S_{HCl-insouble S} values can be reasonably explained by the fact that the sulfur isotope ratio of organic sulfur has a wide range compared with that of other sulfur species. Consequently, this data set could contribute to a better understanding of elemental and isotopic S mass fractions of widely used geological RMs by different acid pre-treatments.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 4","pages":"715-726"},"PeriodicalIF":3.4,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145480053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved Precision and Reference Materials for Stable Carbon Isotope Measurement in Basaltic Glasses using Secondary Ion Mass Spectrometry","authors":"Joshua Shea,&nbsp;Ery Hughes,&nbsp;Robert Balzer,&nbsp;Ilya Bindeman,&nbsp;Jon Blundy,&nbsp;Richard Brooker,&nbsp;Roman Botcharnikov,&nbsp;Pierre Cartigny,&nbsp;EIMF,&nbsp;Glenn Gaetani,&nbsp;Geoff Kilgour,&nbsp;John Maclennan,&nbsp;Brian Monteleone,&nbsp;David A. Neave,&nbsp;Oliver Shorttle","doi":"10.1111/ggr.12609","DOIUrl":"https://doi.org/10.1111/ggr.12609","url":null,"abstract":"<p>We introduce three new synthetic basalt reference materials and a new high-precision set-up for stable carbon isotope measurement in basaltic glasses using a large-geometry secondary ion mass spectrometry (SIMS) instrument. The new reference materials, characterised for carbon mass fraction and isotope composition, show homogeneity for <i>in situ</i> analysis for the reported set-up. Their bulk hydrogen mass fraction and isotope ratios are reported. Our SIMS protocol uses multi-collection, cycling between concurrent measurements of ¹²C and ¹³C on electron multipliers, and either ³⁰Si or ¹⁸O, as a reference mass, on a 10¹¹ Ω resistor Faraday cup. This set-up achieves high measurement repeatability for δ¹³C down to ± 0.35‰ 1RSE at 1706 ⁺⁸⁹/_-88 μg g^-1 CO₂, with ± 1.00‰ 1RSE or better between 163 ^+5.1/_-5.2 and 267 ^+8.9/_-8.9 μg g^-1 CO₂, using a 10 nA primary beam current and a 40 μm analytical pit over a 100 cycle analysis. Carbon blanks were characterised by measuring carbon-free olivines, allowing for blank corrections on δ¹³C measurements. After blank and instrument mass fractionation corrections, we measure δ¹³C in glasses down to 26.16 ^+0.85/_-0.86 μg g^-1 CO₂ with a final measurement standard sample deviation of ± 2.97‰ 1<i>s</i>. We report <i>in situ</i> measurements on an ocean floor basaltic glass and a set of synthetic basaltic glasses to demonstrate our approach. Reference materials and the SIMS set-up improve the accuracy and precision of δ¹³C measurements in natural basaltic glasses across a wide range of geologically relevant carbon contents.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":"607-627"},"PeriodicalIF":3.4,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ggr.12609","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of Ag in Geological Materials by Isotope Dilution ICP-MS Using NH4HF2 Digestion and Interference Removal via Ammonia Coprecipitation","authors":"Tao He,&nbsp;Hui Cao,&nbsp;Wang Lang,&nbsp;Zhaochu Hu,&nbsp;Zaicong Wang,&nbsp;Zongqi Zou,&nbsp;Wen Zhang,&nbsp;Haihong Chen,&nbsp;Yongsheng Liu","doi":"10.1111/ggr.12614","DOIUrl":"https://doi.org/10.1111/ggr.12614","url":null,"abstract":"<p>Silver is a powerful geochemical tracer in various geological processes (e.g., hydrothermal deposit formation and evolution of the terrestrial and Martian mantles). The measurement of the ultra-trace Ag (&lt; 0.1 μg g^-1) in geological samples by ICP-MS is often hindered due to serious polyatomic interferences arising from Zr, Nb and Y elements presented in samples. In this study, a simple and rapid ammonia coprecipitation method was developed to remove interference elements (Zr, Nb and Y) in NH₄HF₂ digests for the determination of Ag mass fractions in geological materials by isotope dilution ICP-MS (ID-ICP-MS). The removal of interference elements (Zr, Nb and Y) in digestion solutions of geological materials was achieved using ammonia coprecipitation, effectively eliminating their polyatomic interferences. To compensate for the incomplete recovery of Ag during ammonia coprecipitation, isotope dilution calibration was chosen over internal standard calibration to achieve final accurate results. The limit of quantitation for Ag using the proposed method was 1.83 ng g^-1. The results obtained for Ag mass fractionation in nine international geological reference materials were in good agreement with the published values obtained by ID-ICP-MS and ICP-MS/MS. The proposed simple, rapid and practical analytical method for the determination of Ag mass fractions improves our understanding of the behaviour of silver in cosmochemistry and geochemistry studies.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":"555-567"},"PeriodicalIF":3.4,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potassium Isotope Ratios (δ41K) of Eighteen Chinese Rock Reference Materials","authors":"Wenjun Li,&nbsp;Bingyu Gao,&nbsp;Qiqi Pan,&nbsp;Bai Yang,&nbsp;Jing Wang,&nbsp;Benxun Su","doi":"10.1111/ggr.12613","DOIUrl":"https://doi.org/10.1111/ggr.12613","url":null,"abstract":"<p>Potassium isotope ratios (<i>δ</i>⁴¹K) were determined for eighteen Chinese geological reference materials (RMs, GSR series) encompassing igneous, metamorphic and sedimentary rocks. K₂O mass fractions (<i>w</i>) ranged between 0.15 and 7.5% in these RMs. Measurements were conducted using a collision cell MC-ICP-MS with sample-standard bracketing technique. The intermediate precision of K isotopic determination, based on measurement results collected over 2.5 years, was 0.04‰ (2<i>s</i>, <i>n</i> = 69) for in-house GSB K solution and 0.05‰ (2<i>s</i>, <i>n</i> = 63) for basaltic RM BCR-2. The accuracy of our data was assessed by comparison with previously published data and/or utilising two or three different measurement procedures. The high-precision <i>δ</i>⁴¹K values for these eighteen RMs span a wide range from -1.15‰ (GBW07122, GSR 15, amphibolite) to 0.28‰ (GBW07120, GSR 13, limestone), and data for six RM are presented for the first time, making them valuable references for quality assurance and inter-laboratory comparisons.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":"665-674"},"PeriodicalIF":3.4,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using Peak Geometry and Shifts in the X-Ray Spectrum of Carbon from Electron Probe Microanalysis to Determine Thermal Maturity of Organic Matter","authors":"Haolin Zhou,&nbsp;Gelu Costin,&nbsp;Justin E. Birdwell,&nbsp;Paul C. Hackley,&nbsp;Daniel Minisini,&nbsp;Tanguy Terlier,&nbsp;Mark A. Torres","doi":"10.1111/ggr.12611","DOIUrl":"https://doi.org/10.1111/ggr.12611","url":null,"abstract":"<p>During the burial of mudstones, the associated organic matter undergoes gradual thermal maturation, a key process that can influence the reactivity of organic matter during catagenesis, the formation of hydrocarbon deposits and the chemical weathering of mudstones. Conventional methods for assessing the thermal maturity of organic matter often fail to reflect the geochemical heterogeneity between individual organic phases in mudstone samples. Here, we report an alternative, non-destructive, surficial and micro-scale (analytical spot size of ~ 300 nm with about 4 μm diffusion depth for micrometre-size organic grains) method to evaluate the thermal maturity of organic matter in mudstones using the carbon <i>K</i>α X-ray spectrum measured by field emission-electron probe microanalyser (FE-EPMA). Using this method, we observed correlations between parameter values derived from FE-EPMA spectra, including the peak position, the peak area and the intra-sample heterogeneity of these measurements, and independently measured vitrinite/solid bitumen reflectance for a suite of mudstones, representing different age, geological context and burial depth. With the increased values in peak area and position, we identified an increase in the carbon mass fraction of organic matter and the mean nominal oxidation state of carbon approaching zero. These trends, which are consistent with aromatisation and graphitisation, provide the rationale for using FE-EPMA to estimate the thermal maturity of organic matter. To explore some of these trends in more detail, we employed time-of-flight secondary ionisation mass spectrometry, X-ray photoelectron spectroscopy and optical reflectance measurements on a subset of samples.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":"591-605"},"PeriodicalIF":3.4,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Compositional Matrix Effects on Oxygen Isotope Measurements in Silicate Minerals and Glasses Using SIMS","authors":"Elena Dubinina,&nbsp;Alexander Borisov,&nbsp;Andrey Gurenko,&nbsp;S.A. Kossova,&nbsp;A.S. Avdeenko","doi":"10.1111/ggr.12612","DOIUrl":"https://doi.org/10.1111/ggr.12612","url":null,"abstract":"<p>Instrumental mass fractionation (IMF) accompanying oxygen isotope measurement by SIMS was studied for seventeen experimental alkali-rich (0–10 mole % of both K₂O and Na₂O) glasses along with a set of reference material glasses and minerals (quartz and olivine). Analyses were undertaken in two measurement sessions using a CAMECA IMS 1270-E7 ion microprobe operated under identical instrumental conditions. All employed experimental glasses and reference materials were re-analysed by laser fluorination gas source-mass spectrometry (LF GS-MS) to estimate their IMF values. The obtained IMF values, which ranged from -2.31 to +5.14‰, were combined with the IMF data for alkaline free glasses to estimate the compositional matrix effect for all major rock-forming oxides. Using this joint data set (including forty-four experimental glasses) a number of linear multiple variable regression models describing the link between IMF and major element chemical composition were established. To generalise the established models for the matrix effect (ME) correction we also evaluated an approach of routine measurement of chemically pure quartz with a known ¹⁸O/¹⁶O ratio along with the other glass reference materials and use it as the “zero” point for multi-component regression fit. Our choice was justified by the fact that the ME in quartz has to be strictly constant. The last represents an advantage of using quartz instead of olivine or any other reference materials for normalisation. Finally, we tested our best multi-component regression model (standard error as low as 0.4‰) established for silicate glasses, being presumably crystallographic-amorphous substances, in application to different structural groups of minerals such as olivine, clinopyroxene, garnet, feldspars and quartz. The difference between the measured ME values and the model-predicted varied systematically, and the magnitude of the observed deviations increased proportionally with increasing magnitude of the measured ME, pointing towards the role of crystallographic structure in producing a compositionally related matrix effect.</p>","PeriodicalId":12631,"journal":{"name":"Geostandards and Geoanalytical Research","volume":"49 3","pages":"629-644"},"PeriodicalIF":3.4,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}