Journal of Analytical Atomic Spectrometry最新文献

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Quantification of cadmium, rhenium and thallium in low-content samples via isotope dilution ICP-MS combined with single-step anion exchange preconcentration 同位素稀释ICP-MS结合单步阴离子交换预富集法定量低含量样品中的镉、铼和铊
IF 3.1 2区 化学
Journal of Analytical Atomic Spectrometry Pub Date : 2025-07-21 DOI: 10.1039/D4JA00458B
Jia-Lu Wang, Qiao-Hui Zhong, Zhao-Yang Wang, Lu Yin, Jia-Kai Guo, Zhi-Bing Wang and Jie Li
{"title":"Quantification of cadmium, rhenium and thallium in low-content samples via isotope dilution ICP-MS combined with single-step anion exchange preconcentration","authors":"Jia-Lu Wang, Qiao-Hui Zhong, Zhao-Yang Wang, Lu Yin, Jia-Kai Guo, Zhi-Bing Wang and Jie Li","doi":"10.1039/D4JA00458B","DOIUrl":"https://doi.org/10.1039/D4JA00458B","url":null,"abstract":"<p >Cadmium (Cd), rhenium (Re) and thallium (Tl) are dispersed metals that serve as geochemical tracers for various geological and environmental processes. Both Cd and Tl exhibit high toxicity and slow metabolic clearance rates, posing risks to plants, animals, and humans. Determining their concentrations in natural samples is challenging due to their low abundance, especially in water samples where concentrations are typically in the range of ng L<small><sup>−1</sup></small> to μg L<small><sup>−1</sup></small>. In this study, we developed a simple, efficient and robust method for the simultaneous separation and quantification of Cd, Re and Tl from a single sample aliquot using an anion exchange resin. Concentrations were subsequently measured by isotope dilution (ID) inductively coupled plasma mass spectrometry (ICP-MS). The validity of this method was demonstrated through repeated analysis of reference materials BHVO-2, BIR-1a and GBW07105 (GSR-3). The results are consistent with previously published values within errors, including precision and accuracy. Additionally, the standard deviations of our concentration measurements are less than 1.49% for Cd, 3.83% for Re, and 1.63% for Tl in in-house water samples. The optimized approach was applied to river samples collected from the Pearl River tributaries. These investigations demonstrate that our sample purification and ID-ICP-MS measurement methods are effective for the quantitative determination of Cd, Re, and Tl concentrations in both rock and river samples. Our study enhances understanding of the aquatic geochemistry of Cd, Re, and Tl, thereby enhancing our ability to predict trace-element dynamics in hydrosystems.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":" 8","pages":" 2232-2242"},"PeriodicalIF":3.1,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144740076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stable carbon isotope analysis of fluorinated organic compounds using infrared spectrometer coupled to gas chromatography† 用红外光谱仪耦合气相色谱法分析含氟有机化合物的稳定碳同位素
IF 3.1 2区 化学
Journal of Analytical Atomic Spectrometry Pub Date : 2025-07-14 DOI: 10.1039/D5JA00168D
Xinyi Du, Biao Jin, Hans H. Richnow, Lingling Zhang, Shutao Gao, Zhiqiang Yu and Ping'an Peng
{"title":"Stable carbon isotope analysis of fluorinated organic compounds using infrared spectrometer coupled to gas chromatography†","authors":"Xinyi Du, Biao Jin, Hans H. Richnow, Lingling Zhang, Shutao Gao, Zhiqiang Yu and Ping'an Peng","doi":"10.1039/D5JA00168D","DOIUrl":"https://doi.org/10.1039/D5JA00168D","url":null,"abstract":"<p >Compound-specific isotope analysis (CSIA) is a powerful tool for tracing the sources and transformation processes of organic pollutants. With the rising concern on fluorinated organic compounds, there is a pressing need to develop reliable CSIA methods for determining their carbon isotopic compositions. This study developed a gas chromatography–isotope ratio infrared spectrometer (GC-IRIS) method for carbon CSIA of perfluorinated carboxylic acids and ethers. The <em>δ</em><small><sup>13</sup></small>C signatures determined by GC-IRIS were −26.1 ± 0.3‰ for heptafluorobutyric acid, −30.1 ± 0.3‰ for perfluoro-2-butyltetrahydrofuran, −30.2 ± 0.3‰ for trifluoroacetic acid, −41.0 ± 0.2‰ for perfluoropentanoic acid, −45.3 ± 0.2‰ for perfluorobutyl methyl ether, and −55.9 ± 0.4‰ for perfluoropropyl vinyl ether, respectively. Cross-validation using elemental analysis–isotope ratio mass spectrometry (EA-IRMS) confirmed consistency between the two methods, showing good agreement in the <em>δ</em><small><sup>13</sup></small>C values, supporting the reliability of the GC-IRIS method. The method was further applied to resolve carbon isotope fractionation during volatilization of perfluorobutyl methyl ether and perfluoro-2-butyltetrahydrofuran, both exhibiting inverse carbon isotope effects. This work reports a novel and robust GC-IRIS method for carbon CSIA of fluorinated compounds, highlighting the potential for characterizing isotopic signatures and environmental behaviors of different fluorinated organic compounds.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":" 8","pages":" 1940-1945"},"PeriodicalIF":3.1,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144740024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fusion of elemental and molecular fingerprints for accurate classification of kimchi by country of origin† 元素指纹和分子指纹融合用于泡菜原产国准确分类†
IF 3.1 2区 化学
Journal of Analytical Atomic Spectrometry Pub Date : 2025-07-12 DOI: 10.1039/D5JA00200A
Sandeep Kumar, Yujin Oh, Hyemin Jung, Kyung-Sik Ham, Hyun-Jin Kim, Song-Hee Han, Sang-Ho Nam and Yonghoon Lee
{"title":"Fusion of elemental and molecular fingerprints for accurate classification of kimchi by country of origin†","authors":"Sandeep Kumar, Yujin Oh, Hyemin Jung, Kyung-Sik Ham, Hyun-Jin Kim, Song-Hee Han, Sang-Ho Nam and Yonghoon Lee","doi":"10.1039/D5JA00200A","DOIUrl":"https://doi.org/10.1039/D5JA00200A","url":null,"abstract":"<p >The geographical origin of commercial kimchi products is a key indicator of their quality, authenticity, and economic value. In this study, we propose a spectroscopic classification method combining laser-induced breakdown spectroscopy (LIBS) and infrared (IR) spectroscopy to differentiate kimchi samples from South Korea and China. LIBS was used to obtain elemental profiles based on the emission intensities of K, Mg, Na, Ca, C, H, and O, while IR spectroscopy captured molecular features. Principal component analysis of IR spectra in the carbohydrate absorption region (1254–1018 cm<small><sup>−1</sup></small>) identified the third principal component (PC3) as the most discriminative. Classification models using <em>k</em>-nearest neighbors (<em>k</em>-NN) were evaluated with leave-one-out cross-validation. Two LIBS-only models—using variable sets (i) K I (766 nm), O I (777 nm), C I (248 nm), and (ii) K I, O I, Mg II (279 nm)—achieved 94.4% accuracy. The IR-only model reached 86.4%. Fusion of LIBS and IR features, with optimized weighting for the IR variable, enhanced model performance. The best result (96.8% accuracy) was achieved by combining LIBS variables K I, O I, and C I with IR PC3. We also introduce a statistical method to predict the optimal weighting factor for fusion, reducing computational complexity by minimizing the number of neighbors in <em>k</em>-NN. This LIBS-IR fusion strategy provides a robust tool for verifying kimchi origin.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":" 8","pages":" 2222-2231"},"PeriodicalIF":3.1,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144740075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Online collection of LC effluent as droplets for automatic injection into ICP-MS† LC出水作为液滴在线收集,用于自动注射到ICP-MS†中
IF 3.1 2区 化学
Journal of Analytical Atomic Spectrometry Pub Date : 2025-07-07 DOI: 10.1039/D5JA00137D
Nick H. Erfurth, Matthew M. Jones, Cortney M. Pincock and Emily M. Hoadley
{"title":"Online collection of LC effluent as droplets for automatic injection into ICP-MS†","authors":"Nick H. Erfurth, Matthew M. Jones, Cortney M. Pincock and Emily M. Hoadley","doi":"10.1039/D5JA00137D","DOIUrl":"https://doi.org/10.1039/D5JA00137D","url":null,"abstract":"<p >A sample introduction technique was developed to allow for online, dropwise injection of effluent into a mass spectrometer (MS). This allowed for the coupling of chromatography systems that were not driven by pumps without altering the set-up or separation performance. This capability combined the benefits of coupling separation and measurement while also enabling accurate chromatographic evaluation that would generally be performed offline. The incorporation of a flowing rinse into the system made dropwise resolution possible for any liquid capable of forming drops under ambient conditions. The technique was demonstrated utilizing gas pressurized extraction chromatography (GPEC) and inductively coupled plasma-time-of-flight mass spectrometry (ICP-TOFMS) to illustrate the qualitative applications for rapid separation development and procedure evaluation. This method's quantitative applications were evaluated using single and double isotope dilution mass spectrometry (IDMS) with an external mass bias correction to measure analytes across entire elutions including volumes as small as single drops. The total neodymium values afforded by both single and double IDMS were within the uncertainty of the calculated value for evaluation of full elution peaks and for most of the single drops analyzed that reached above 10k cps Nd-144.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":" 8","pages":" 2243-2250"},"PeriodicalIF":3.1,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144740077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High precision analysis of mercury isotopes at ultra-low concentrations using dry cold vapor generation-MC-ICP-MS† 使用干冷蒸汽生成- mc - icp - ms†对超低浓度汞同位素进行高精度分析
IF 3.1 2区 化学
Journal of Analytical Atomic Spectrometry Pub Date : 2025-07-07 DOI: 10.1039/D5JA00220F
Jiaxin Sun, Yaqiu Zhao, Bridget A. Bergquist, Pengfei Li, Ruoyu Sun, Yi Liu, Jiubin Chen and Wang Zheng
{"title":"High precision analysis of mercury isotopes at ultra-low concentrations using dry cold vapor generation-MC-ICP-MS†","authors":"Jiaxin Sun, Yaqiu Zhao, Bridget A. Bergquist, Pengfei Li, Ruoyu Sun, Yi Liu, Jiubin Chen and Wang Zheng","doi":"10.1039/D5JA00220F","DOIUrl":"https://doi.org/10.1039/D5JA00220F","url":null,"abstract":"<p >High-precision analysis of mercury (Hg) isotope compositions is fundamental for tracing the Hg cycle in the environment. However, accurate and precise Hg isotope analysis for samples with low Hg concentrations (sub-ppb level) remains one of the most prominent challenges in the analysis and application of Hg isotopes. In this study, we developed a new method for high-precision Hg isotope analysis using a dry cold vapor generation (dry-CVG) system coupled to MC-ICP-MS. The dry-CVG system removed water content from the Hg(0) cold vapor and thus significantly inhibited the formation of oxides and hydrides, providing better signal intensity, stability and precision for Hg isotope analysis. Under optimized conditions, the analytical uncertainties were ±0.07‰ and ±0.06‰ (2SD) for δ<small><sup>202</sup></small>Hg and Δ<small><sup>199</sup></small>Hg, respectively at a concentration of 0.1 ng mL<small><sup>−1</sup></small> (0.75 ng Hg consumption), which is comparable to the typical precision reported in the literature but obtained at 10-fold higher Hg concentrations. Moreover, our method substantially improved the precision for Hg isotope analysis at higher concentrations (≥2.0 ng mL<small><sup>−1</sup></small>), reaching ±0.02‰ and ±0.01‰ (2SD) for δ<small><sup>202</sup></small>Hg and Δ<small><sup>199</sup></small>Hg, respectively. The accuracy and precision of this method were further verified using a variety of certified reference materials with different types of natural matrices (including plant, soil and sediment). Thus, our method provides a promising approach for accurate Hg isotope analysis at low concentrations with high precision, and may expand the future application of Hg isotopes in geochemical and environmental studies.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":" 8","pages":" 2251-2260"},"PeriodicalIF":3.1,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144740078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In situ measurement of sulfur isotope ratios in sulfide samples with LA-ICP-MS/MS using N2O and He reaction gas† LA-ICP-MS/MS在N2O和He反应气†中原位测定硫化物样品中的硫同位素比值
IF 3.1 2区 化学
Journal of Analytical Atomic Spectrometry Pub Date : 2025-07-04 DOI: 10.1039/D5JA00166H
Estida Eensoo, Päärn Paiste, Kärt Paiste, David A. Fike and Jennifer L. Houghton
{"title":"In situ measurement of sulfur isotope ratios in sulfide samples with LA-ICP-MS/MS using N2O and He reaction gas†","authors":"Estida Eensoo, Päärn Paiste, Kärt Paiste, David A. Fike and Jennifer L. Houghton","doi":"10.1039/D5JA00166H","DOIUrl":"https://doi.org/10.1039/D5JA00166H","url":null,"abstract":"<p >Sulfur isotope signatures (<em>δ</em><small><sup>34</sup></small>S) in sulfide minerals such as pyrite and pyrrhotite may reflect the specific geological conditions at their genesis. Understanding the <em>δ</em><small><sup>34</sup></small>S variability can help track (bio)–geochemical processes, from ore formation to finding evidence of early life. However, as sulfide mineral growth can occur at various stages of rock history, traditional bulk S isotope analysis can incorporate mixed geochemical signals generated by unrelated processes. <em>In situ</em> analytical techniques can be used to investigate compositional changes in <em>δ</em><small><sup>34</sup></small>S caused by early environmental or secondary processes. In this study, we aim to characterize <em>δ</em><small><sup>34</sup></small>S variability in pyrite and pyrrhotite using laser ablation inductively coupled plasma tandem mass spectrometry (LA-ICP-MS/MS) while introducing a mixture of N<small><sub>2</sub></small>O and He in the reaction chamber to remove polyatomic interferences at <em>m</em>/<em>z</em> = 32 and <em>m</em>/<em>z</em> = 34. Alongside tuning the respective laser and ICP parameters, we employ a self-developed signal-smoothing device consisting of coiled thermoplastic elastomer (TPE) tubing and a cyclonic spray chamber to achieve better signal stability. In this way, we propose a new, fast, <em>in situ</em> screening approach for measuring the <em>δ</em><small><sup>34</sup></small>S of sulfides.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":" 8","pages":" 2126-2137"},"PeriodicalIF":3.1,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ja/d5ja00166h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144740063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A review of spectral broadening in laser atomic absorption spectroscopy 激光原子吸收光谱展宽研究进展
IF 3.1 2区 化学
Journal of Analytical Atomic Spectrometry Pub Date : 2025-07-02 DOI: 10.1039/D5JA00058K
Erfan Chenshen, Juntao Tan, Bin Wang, Erlong Jiang, Nan Zhao, Shaofeng Zheng, Zeren Luo, Jiaming Li and Qingmao Zhang
{"title":"A review of spectral broadening in laser atomic absorption spectroscopy","authors":"Erfan Chenshen, Juntao Tan, Bin Wang, Erlong Jiang, Nan Zhao, Shaofeng Zheng, Zeren Luo, Jiaming Li and Qingmao Zhang","doi":"10.1039/D5JA00058K","DOIUrl":"https://doi.org/10.1039/D5JA00058K","url":null,"abstract":"<p >Laser atomic absorption spectroscopy (LAAS) has played a significant role in various fields such as nuclear forensics, chemical detection, medical diagnostics, environmental monitoring, and various industrial sectors, leveraging its unique advantages. However, spectral broadening phenomena significantly impact the accuracy and precision of LAAS measurements. This critical review examines spectral broadening and its implications for LAAS, incorporating recent advances in ultrafast diagnostics, extreme plasma conditions, and data-driven modeling. The convolution of various broadening mechanisms results in the final profile of spectral lines, among which Doppler, Stark, and pressure broadening are the primary sources in LAAS. Though spectral broadenings generally introduce measurement errors, they also provide crucial information about plasma characteristics. The review concludes with future perspectives, highlighting emerging technologies including artificial intelligence and novel suppression strategies that promise to enhance LAAS capabilities beyond current limitations.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":" 8","pages":" 1902-1915"},"PeriodicalIF":3.1,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144740021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
AutoSpect: an all-in-one software solution for automated processing of LA-ICP-TOF-MS datasets† AutoSpect:用于自动处理LA-ICP-TOF-MS数据集的一体化软件解决方案。
IF 3.1 2区 化学
Journal of Analytical Atomic Spectrometry Pub Date : 2025-07-02 DOI: 10.1039/D5JA00145E
Andrew M. Crawford, David Z. Zee, Qiaoling Jin, Aaron Sue, Niharika Sinha, Soo Hyun Ahn, Thomas V. O'Halloran and Keith W. MacRenaris
{"title":"AutoSpect: an all-in-one software solution for automated processing of LA-ICP-TOF-MS datasets†","authors":"Andrew M. Crawford, David Z. Zee, Qiaoling Jin, Aaron Sue, Niharika Sinha, Soo Hyun Ahn, Thomas V. O'Halloran and Keith W. MacRenaris","doi":"10.1039/D5JA00145E","DOIUrl":"10.1039/D5JA00145E","url":null,"abstract":"<p >LA-ICP-TOF-MS provides rapid, high resolution elemental analysis of biological and non-biological samples. However, accurate real-time data analysis frequently requires the user to account for several instrumental and experimental variables that can change during data acquisition. AutoSpect is a novel software tool designed to automate the processing and fitting of LA-ICP-TOF-MS data, addressing key challenges such as time-dependent spectral drift, instrument sensitivity drift, calibration inaccuracies, and peak deconvolution, enabling researchers to rapidly and accurately process complex datasets. The tool is optimized to be robustly applicable across scientific fields (<em>e.g.</em>, geochemistry, biology, and materials science), providing a streamlined solution for end users seeking to maximize the potential of LA-ICP-TOF-MS for high-resolution elemental mapping and isotopic analysis.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":" 8","pages":" 2162-2178"},"PeriodicalIF":3.1,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12243102/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144625028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigating the sensitivity difference of gaseous and particulate carbon in two-phase sample transport in LA-ICP-MS† 研究了LA-ICP-MS两相输样中气态碳和颗粒碳的敏感性差异。
IF 3.1 2区 化学
Journal of Analytical Atomic Spectrometry Pub Date : 2025-06-30 DOI: 10.1039/D5JA00172B
Lukas Brunnbauer, David Ken Gibbs, Detlef Günther and Andreas Limbeck
{"title":"Investigating the sensitivity difference of gaseous and particulate carbon in two-phase sample transport in LA-ICP-MS†","authors":"Lukas Brunnbauer, David Ken Gibbs, Detlef Günther and Andreas Limbeck","doi":"10.1039/D5JA00172B","DOIUrl":"10.1039/D5JA00172B","url":null,"abstract":"<p >LA-ICP-MS is a widely used analytical technique for elemental analysis of different solid samples, including carbon-based samples. To compensate for matrix-effects and instrumental drifts during analysis, application of an internal standard is recommended. For carbon-based samples, the application of carbon as an internal standard seems reasonable but is typically not recommended due to the so-called two-phase sample transport where ablated carbon is transported both as particulate and gaseous species. The quantitative deviations in the sensitivity of particulate and gaseous carbon have not been accessible so far but would provide useful insights into the application of carbon as an internal standard. More precisely, if similar sensitivity for particulate and gaseous carbon species is found, application as an internal standard would not be restricted. To investigate this, we analyze the two-phase sample transport of carbon upon ablation of 5 different polymers, which all form different ratios of particulate and gaseous carbon species. Amongst the studied materials, it has been observed that 2 samples provide almost exclusive formation of a gas phase. Correlating these observed signals for selected polymers with the ablated mass of carbon allows us to calculate the sensitivity of gaseous carbon species as 13.8 cts per pg. Using a mass balance approach, we estimated the sensitivity of particulate carbon for the 3 other polymers, where we find significant differences in sensitivity ranging from 1.69 cts per pg to 14.06 cts per pg. This indicates that the sensitivity for particulate carbon species is highly dependent on the sample matrix, resulting in sensitivity differences up to a factor of 7. All in all, the findings of this study support the results of carbon being an inadequate choice for an internal standard in LA-ICP-MS.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":" 8","pages":" 2179-2186"},"PeriodicalIF":3.1,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12243101/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144625029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Precise isotope determination of sub-microgram Mg by the critical mixture double spike technique and its application to fluid inclusions in halite† 临界混合双尖峰技术精确测定亚微克Mg同位素及其在岩盐†流体包裹体中的应用
IF 3.1 2区 化学
Journal of Analytical Atomic Spectrometry Pub Date : 2025-06-28 DOI: 10.1039/D5JA00174A
Yang Wang, Weijuan Yang, Shan Ke, Yongsheng He and Qishun Fan
{"title":"Precise isotope determination of sub-microgram Mg by the critical mixture double spike technique and its application to fluid inclusions in halite†","authors":"Yang Wang, Weijuan Yang, Shan Ke, Yongsheng He and Qishun Fan","doi":"10.1039/D5JA00174A","DOIUrl":"https://doi.org/10.1039/D5JA00174A","url":null,"abstract":"<p >With only three isotopes, Mg isotopic measurements have been routinely performed using the sample-standard-bracketing (SSB) method. When using SSB to correct mass bias, δ<small><sup>26</sup></small>Mg becomes negatively biased with decreasing sample loading mass, which hinders the application of Mg isotopes to fluid inclusions in halite due to their low Mg concentration and extremely high Na/Mg ratio. In this study, we used 0.5 mol per L HNO<small><sub>3</sub></small> and AG50W-X8 resin to separate Mg from Na. Even when the initial Na/Mg ratio of samples is as high as 5000, Na can be efficiently removed with almost 100% Mg recovery. This process is accomplished within 5 hours. The residual matrix can be removed using procedures modified from Li <em>et al.</em> (2016). To ensure optimal performance of the separation protocol, reducing the sample loading size is the most straightforward approach. Critical mixture double spike (CMDS) technique enables accurate and precise Mg isotope measurements with reduced sample size, as indicated by near-zero Δ<small><sup>26</sup></small>Mg<small><sub>measured-recommended</sub></small> values for GSP-2, BHVO-2 and high-Na/Mg synthetic solutions at 0.9–5.8 μg of Mg loading. Minimum Mg mass loaded onto the column can reach 0.9 μg, which is 11–22 times lower than the amount (typically 10–20 μg) required for accurate SSB measurements. The precision and accuracy of δ<small><sup>26</sup></small>Mg are better than 0.05% for the established procedures at sub-μg Mg loading. Finally, this method is applied to halite from core ISL1A in the Qarhan Salt Lake, which shows highly variable δ<small><sup>26</sup></small>Mg ranging from −0.663% to −1.222%. Negative fluctuation of these halite δ<small><sup>26</sup></small>Mg values may reflect either water recharge during wetter climatic condition or the precipitation of Mg-bearing minerals (<em>e.g.</em>, carnallite) during the evaporation process, validating the potential of Mg isotopes in tracing the evolution of paleolake water.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":" 8","pages":" 2197-2206"},"PeriodicalIF":3.1,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144740069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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