Spectrochimica Acta Part B: Atomic Spectroscopy最新文献

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Assessment of acupuncture's effectiveness in treating gulf war illness using laser induced breakdown spectroscopy and inductively coupled plasma mass spectrometry 利用激光诱导击穿光谱法和电感耦合等离子体质谱法评估针灸治疗海湾战争疾病的效果
IF 3.2 2区 化学
Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2024-11-15 DOI: 10.1016/j.sab.2024.107076
Kemal E. Eseller , Ali Safi , Helmar G. Adler , Lisa Conboy , Richard M. Gaschnig , Noureddine Melikechi
{"title":"Assessment of acupuncture's effectiveness in treating gulf war illness using laser induced breakdown spectroscopy and inductively coupled plasma mass spectrometry","authors":"Kemal E. Eseller ,&nbsp;Ali Safi ,&nbsp;Helmar G. Adler ,&nbsp;Lisa Conboy ,&nbsp;Richard M. Gaschnig ,&nbsp;Noureddine Melikechi","doi":"10.1016/j.sab.2024.107076","DOIUrl":"10.1016/j.sab.2024.107076","url":null,"abstract":"<div><div>In an effort to contribute to define whether Gulf War Illness (GWI) has physiological aspects, we evaluated the effectiveness of acupuncture treatment by measuring blood plasma metal levels and comparing them to the McGill pain scores of 22 patients. We analyzed the blood plasma samples of 22 GWI patients who underwent 2 acupuncture treatments per week. We analyzed the blood metal levels of these patients at baseline and after 2 and 4 months of treatment with acupuncture using laser-induced breakdown spectroscopy (LIBS). Principal component analysis (PCA) loadings of the LIBS data revealed that emission lines of sodium, potassium, magnesium, and calcium were key features differentiating the two types of blood plasma samples. We also conducted inductively coupled plasma mass spectrometry (ICP-MS) measurements on the same samples and compared the findings to the McGill pain scores of the patients. Levels of sodium, potassium, magnesium, phosphorus, iron, copper, and zinc for all 22 patients were measured using ICP-MS. We observed after 2 and 4 months of acupuncture treatment, the Pearson correlation coefficient of the McGill pain score and the concentrations of phosphorus (P), and zinc (Zn), exhibit a moderate positive correlation with changes in the McGill pain score, with Pearson correlation coefficients of 47 % (<em>p</em> = 0.026) for the 0–2-month period, 45 % (<em>p</em> = 0.038) for the 0–4-month period, and 42 % (<em>p</em> = 0.05) for the 0–2-month period, respectively. Sodium (Na) exhibits a nearly moderate correlation, with a Pearson coefficient of 39 % and a <em>p</em>-value of 0.07. Our result suggests a potential link between element concentrations, acupuncture treatment and pain response.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"222 ","pages":"Article 107076"},"PeriodicalIF":3.2,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657592","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
Characterization of the distribution of mineral elements in chromium-stressed rice (Oryza sativa L.) leaves based on laser-induced breakdown spectroscopy and data augmentation 基于激光诱导击穿光谱和数据增强的铬胁迫水稻(Oryza sativa L.)叶片中矿物质元素的分布表征
IF 3.2 2区 化学
Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2024-11-07 DOI: 10.1016/j.sab.2024.107072
Jiyu Peng , Longfei Ye , Yifan Liu , Fei Zhou , Linjie Xu , Fengle Zhu , Jing Huang , Fei Liu
{"title":"Characterization of the distribution of mineral elements in chromium-stressed rice (Oryza sativa L.) leaves based on laser-induced breakdown spectroscopy and data augmentation","authors":"Jiyu Peng ,&nbsp;Longfei Ye ,&nbsp;Yifan Liu ,&nbsp;Fei Zhou ,&nbsp;Linjie Xu ,&nbsp;Fengle Zhu ,&nbsp;Jing Huang ,&nbsp;Fei Liu","doi":"10.1016/j.sab.2024.107072","DOIUrl":"10.1016/j.sab.2024.107072","url":null,"abstract":"<div><div>The fast and precise visualization of mineral elements in contaminated plants is crucial for understanding nutrient dynamics, plant health, and environmental monitoring. In this study, a Wasserstein generative adversarial network (WGAN) is proposed to expand the data scale and combines laser-induced breakdown spectroscopy (LIBS) with three machine learning methods for mineral elements analysis in Cr-stressed rice (<em>Oryza sativa</em> L.) leaves. In the quantitative analysis of mineral elements, the proposed method improved the prediction performance for Cu, K, Mg, Mn, and Na, except for Ca and Fe, demonstrating the effectiveness of data augmentation in enhancing the quantitative models. Mapping the distribution of Ca, Fe, Mg, K, Mn, and Na in rice leaves shows higher concentrations towards the apical regions and approximately symmetrical distribution along the leaf vein. Additionally, Fe, K, and Mn concentrations are significantly lower in Cr-polluted leaves compared to uncontaminated leaves. These preliminary findings offer insights into the macro distribution of mineral elements in plants.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"222 ","pages":"Article 107072"},"PeriodicalIF":3.2,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657591","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
Rapid determination of 90Sr in seawater using a novel porous crown-based resin and tandem quadrupole ICP-MS/MS in cool plasma and O2-He mode 利用新型多孔冠基树脂和冷等离子体及 O2-He 模式串联四极杆 ICP-MS/MS 快速测定海水中的 90Sr
IF 3.2 2区 化学
Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2024-11-05 DOI: 10.1016/j.sab.2024.107071
Xingchen Liu , Yin Su , Feng Zhang , Jie Chen , Chenyang Peng , Kesheng Hu , Yiman Lu , Jing Lin , Shan Xing , Keliang Shi , Xiaolin Hou
{"title":"Rapid determination of 90Sr in seawater using a novel porous crown-based resin and tandem quadrupole ICP-MS/MS in cool plasma and O2-He mode","authors":"Xingchen Liu ,&nbsp;Yin Su ,&nbsp;Feng Zhang ,&nbsp;Jie Chen ,&nbsp;Chenyang Peng ,&nbsp;Kesheng Hu ,&nbsp;Yiman Lu ,&nbsp;Jing Lin ,&nbsp;Shan Xing ,&nbsp;Keliang Shi ,&nbsp;Xiaolin Hou","doi":"10.1016/j.sab.2024.107071","DOIUrl":"10.1016/j.sab.2024.107071","url":null,"abstract":"<div><div>There has been an increasing need for the rapid and automated analysis of <sup>90</sup>Sr in seawater for the purpose of radiological assessment and emergency response after the FDNPP accident. In this work, a rapid method for the determination of <sup>90</sup>Sr in seawater was established using ICP-MS/MS with cool plasma and collision-reaction gases combined with a new porous crown-based resin separation. A nanofiltration membrane was applied to rapidly pre-treat seawater samples within 3 min and remove most of the matrix components from 500 mL to 250 mL for the first time. A comprehensive investigation was performed to study the extraction behaviors of Sr, Zr, Ge, Y and matrix elements on the new resin, showing an excellent separation efficiency (&gt; 10<sup>3</sup>) using a U-shaped resin column. Based on their different first ionization potentials, the <sup>90</sup>Zr<sup>+</sup> and <sup>89</sup>Y<sup>+</sup> interferences were completely eliminated under cool plasma conditions. The interferences of <sup>74</sup>Ge<sup>16</sup>O<sup>+</sup> and <sup>88</sup>Sr were effectively suppressed by using 2 mL/min He-0.3 mL/min O<sub>2</sub> as the collision and reaction gases in the dynamic collision/reaction cell. Combined with chemical separation, the overall decontamination factors of Zr, GeO and Y were 1.9 × 10<sup>10</sup>, 6.9 × 10<sup>7</sup> and 6.9 × 10<sup>7</sup> respectively, and <sup>88</sup>Sr<sup>1</sup>H<sub>2</sub><sup>+</sup> tailing was reduced by more than 200 times compared to a conventional ICP-MS. A detection limit of 4.6 pg/L (24.0 Bq/L) for <sup>90</sup>Sr was achieved with a sample analysis turn-around time of 6 h for a set of 12 samples. The method was validated by analyzing spiked seawater samples.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"222 ","pages":"Article 107071"},"PeriodicalIF":3.2,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657590","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
Consideration of spectral interference in total reflection X-ray fluorescence analysis using a limited number of calibration samples: Case study of ocean polymetallic nodules 利用数量有限的校准样品考虑全反射 X 射线荧光分析中的光谱干扰:海洋多金属结核案例研究
IF 3.2 2区 化学
Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2024-11-05 DOI: 10.1016/j.sab.2024.107070
Alena N. Zhilicheva , Galina V. Pashkova , Victor M. Chubarov , Artem S. Maltsev , Dmitry Kirsanov , Vitaly Panchuk
{"title":"Consideration of spectral interference in total reflection X-ray fluorescence analysis using a limited number of calibration samples: Case study of ocean polymetallic nodules","authors":"Alena N. Zhilicheva ,&nbsp;Galina V. Pashkova ,&nbsp;Victor M. Chubarov ,&nbsp;Artem S. Maltsev ,&nbsp;Dmitry Kirsanov ,&nbsp;Vitaly Panchuk","doi":"10.1016/j.sab.2024.107070","DOIUrl":"10.1016/j.sab.2024.107070","url":null,"abstract":"<div><div>A novel approach for quantitative analysis in total-reflection X-ray fluorescence (TXRF) which can be employed for the samples with complex matrices inducing overlapping spectral signals in the scenario of limited availability of standard samples is proposed. The approach is based on the least squares (LS) decomposition of real spectra into the weighted sum of simulated individual element subspectra and requires only a single sample of matrix-matched reference material. Oceanic polymetallic nodules and crusts, having complex mineral matrix and containing high concentrations of overlapping elements, were chosen to demonstrate the feasibility of the approach in quantification of 11 elements. The comparison of the results obtained with LS decomposition, internal standard and linear calibration with three standard samples was performed. It was demonstrated that the performance of the proposed approach and of the linear calibration was better than that of internal standard for most of the elements; however, the proposed method requires only a single standard sample.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"222 ","pages":"Article 107070"},"PeriodicalIF":3.2,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657593","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
Signal enhancement with double-pulse LIBS on biological samples and better discrimination of tissues through machine learning algorithms 在生物样品上使用双脉冲 LIBS 增强信号,并通过机器学习算法更好地分辨组织
IF 3.2 2区 化学
Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2024-11-02 DOI: 10.1016/j.sab.2024.107063
Elena Ramela Ciobotea , Cristian Sarpe , Bastian Zielinski , Hendrike Braun , Arne Senftleben , Soumi Dutta , Georg Mayer , Camilo Florian , Thomas Baumert
{"title":"Signal enhancement with double-pulse LIBS on biological samples and better discrimination of tissues through machine learning algorithms","authors":"Elena Ramela Ciobotea ,&nbsp;Cristian Sarpe ,&nbsp;Bastian Zielinski ,&nbsp;Hendrike Braun ,&nbsp;Arne Senftleben ,&nbsp;Soumi Dutta ,&nbsp;Georg Mayer ,&nbsp;Camilo Florian ,&nbsp;Thomas Baumert","doi":"10.1016/j.sab.2024.107063","DOIUrl":"10.1016/j.sab.2024.107063","url":null,"abstract":"<div><div>Laser-induced breakdown spectroscopy (LIBS) is a widely used technique in the field of spectroscopy, enabling the determination of the chemical composition of a variety of samples using typically single laser pulses. This paper presents the successful integration of femtosecond LIBS using double pulses that combined with machine learning algorithms enhanced the discrimination between two animal tissue types (liver and muscle) through the detection of atomic and molecular emissions. The double-pulse configuration was optimized on liver tissue, and the results demonstrated that at 1100 ps pulse delay, the signal was the highest overall for all identified lines, with a fivefold increase compared to single-pulse configuration at comparable energies. By employing femtosecond double-pulse LIBS, it is possible to achieve enhanced signal quality with a better signal-to-noise ratio. Both algorithms used here (Artificial Neural Network and Random Forest) consequently demonstrate superior performance in tissue type prediction when double pulses are employed, as compared to single pulses. The combination of femtosecond double-pulse LIBS with machine learning algorithms has the potential to be an effective technique for thin biological samples (for example biopsy sections), with minimal ablation.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"222 ","pages":"Article 107063"},"PeriodicalIF":3.2,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657594","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
LIBS plasma diagnostics with SuperCam on Mars: Implications for quantification of elemental abundances 利用超级相机对火星上的 LIBS 等离子体进行诊断:对元素丰度量化的影响
IF 3.2 2区 化学
Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2024-11-01 DOI: 10.1016/j.sab.2024.107061
H.T. Manelski , R.C. Wiens , B. Bousquet , P.B. Hansen , S. Schröder , S. Clegg , N.D. Martin , A.E. Nelson , R.K. Martinez , A.M. Ollila , A. Cousin
{"title":"LIBS plasma diagnostics with SuperCam on Mars: Implications for quantification of elemental abundances","authors":"H.T. Manelski ,&nbsp;R.C. Wiens ,&nbsp;B. Bousquet ,&nbsp;P.B. Hansen ,&nbsp;S. Schröder ,&nbsp;S. Clegg ,&nbsp;N.D. Martin ,&nbsp;A.E. Nelson ,&nbsp;R.K. Martinez ,&nbsp;A.M. Ollila ,&nbsp;A. Cousin","doi":"10.1016/j.sab.2024.107061","DOIUrl":"10.1016/j.sab.2024.107061","url":null,"abstract":"<div><div>The Perseverance rover landed in Jezero Crater, Mars, in 2021 to explore an ancient delta for signs of past life and collect samples for a future Mars Sample Return Mission. SuperCam, onboard Perseverance, uses Laser Induced Breakdown Spectroscopy (LIBS) to quantify the elements in the rocks/soils encountered along the rover's traverse. LIBS is desirable for planetary science missions because of its effectiveness at a distance and with different target types (rock, soil, etc). However, decreased laser irradiance with distance and changing coupling efficiency in different targets could cause the physical conditions of the plasma plume to vary, with important implications for SuperCam's elemental calibration. This study examines the characteristics of laser-induced plasmas on Mars by estimating apparent temperature via the multiline Boltzmann plot method and electron density using Stark broadening of the H-α line. We find that apparent plasma temperatures do not decrease with distance or vary systematically with target type (rock vs soil). The variability in plasma temperatures seen on Mars is fully represented in the laboratory dataset used for SuperCam's elemental calibration, which suggests that our elemental calibration is likely robust against observed changes in apparent plasma temperature. These results imply that SuperCam can make reliable LIBS observations to at least 8 m. Estimated electron density is 1.4× higher in soils than rock targets, which is likely related to the dependence of the H-α line on topographic relief, a poorly understood mechanism which contributes to the difficulty of quantifying hydrogen abundance in Mars spectra.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"222 ","pages":"Article 107061"},"PeriodicalIF":3.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586630","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
Outside Front Cover - Journal name, Cover image, Volume issue details, ISSN, Cover Date, Elsevier Logo and Society Logo if required 封面外侧 - 期刊名称、封面图片、卷期详情、ISSN、封面日期、爱思唯尔徽标和学会徽标(如需要
IF 3.2 2区 化学
Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2024-11-01 DOI: 10.1016/S0584-8547(24)00209-X
{"title":"Outside Front Cover - Journal name, Cover image, Volume issue details, ISSN, Cover Date, Elsevier Logo and Society Logo if required","authors":"","doi":"10.1016/S0584-8547(24)00209-X","DOIUrl":"10.1016/S0584-8547(24)00209-X","url":null,"abstract":"","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"221 ","pages":"Article 107064"},"PeriodicalIF":3.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658645","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
Diffraction peak identification and correction in EDXRF spectroscopy 电离辐射 X 射线荧光光谱中的衍射峰识别和校正
IF 3.2 2区 化学
Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2024-11-01 DOI: 10.1016/j.sab.2024.107060
Said Sadeg , Jean Cauzid , Cécile Fabre , El-Hadi Djermoune
{"title":"Diffraction peak identification and correction in EDXRF spectroscopy","authors":"Said Sadeg ,&nbsp;Jean Cauzid ,&nbsp;Cécile Fabre ,&nbsp;El-Hadi Djermoune","doi":"10.1016/j.sab.2024.107060","DOIUrl":"10.1016/j.sab.2024.107060","url":null,"abstract":"<div><div>Energy dispersive X-ray fluorescence (EDXRF) spectroscopy is an analytical technique often used to create maps of the elemental chemical composition. The fluorescence signal can be influenced by X-ray diffraction peaks, a phenomenon that can lead to difficulties or errors in interpreting spectral peaks. However, diffraction can also be useful if we successfully separate it from the fluorescence signal. In this paper, we propose different methods to deal with the diffraction peaks by using the signals obtained from a spectrometer equipped with two detectors. These methods were tested on a thin section of a rock sample to show their effectiveness in processing diffraction peaks. Each method showed its ability to deal with the diffraction peaks in a more or less effective way and each has its own limitations. The latter have to be taken into account when analyzing the EDXRF signal, whether in a geological context or in any other context.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"221 ","pages":"Article 107060"},"PeriodicalIF":3.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554201","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
Multi-dimensional analysis of NiCr alloy nanofilms based on Ps-LIBS technology 基于 Ps-LIBS 技术的镍铬合金纳米薄膜多维分析
IF 3.2 2区 化学
Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2024-10-31 DOI: 10.1016/j.sab.2024.107062
Yingying Liu , Chuanqi Wu , Lili Dong , Junshan Xiu
{"title":"Multi-dimensional analysis of NiCr alloy nanofilms based on Ps-LIBS technology","authors":"Yingying Liu ,&nbsp;Chuanqi Wu ,&nbsp;Lili Dong ,&nbsp;Junshan Xiu","doi":"10.1016/j.sab.2024.107062","DOIUrl":"10.1016/j.sab.2024.107062","url":null,"abstract":"<div><div>With the rapid development of thin film materials, Ni<img>Cr alloy nanofilms have a very wide range of applications in many fields due to their excellent properties. In this paper, Ni<img>Cr alloy nanofilms with different Ni<img>Cr content ratios were prepared using electron beam evaporation technology. The calibration curves of the Ni / Cr content ratio and the corresponding spectral line intensity ratio of the thin film samples were plotted. The linear fitting coefficient (RZhou and Tian (2005) [<span><span>2</span></span>]) of this calibration curve reached 0.99, which had a good linear fitting degree. The quantitative analysis of Ni<img>Cr alloy thin film samples was carried out by Picosecond Laser Induced Breakdown Spectroscopy (Ps-LIBS). Calculated using the Boltzmann method and the Stark broadening method, the plasma electron temperature (T) was about 7048 K and the electron density (Ne) was about 6.08 × 10<sup>16</sup> cm<sup>−3</sup>, and then the plasma characteristics of Ps-LIBS technology were preliminarily studied. In order to further realize the analysis of thin film samples, the depth profile of thin film samples was preliminary analyzed using the Ps-LIIBS technology and the thickness of a single laser pulse ablation was about 75 nm, which could be used to evaluate the thickness of the thin films. All the results show that Ps-LIBS technology can be used to realize the quantitative and quantitative analyses of Ni<img>Cr alloy nanofilms prepared using the electron beam evaporation technology, which provides technical support for exploring the application potential of Ni<img>Cr alloy nanofilms in practice.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"222 ","pages":"Article 107062"},"PeriodicalIF":3.2,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586471","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
Semi-quantitative μLIBS mapping of germanium diffusion between metal and silicate during planetary core–mantle segregation 行星核幔分离过程中锗在金属和硅酸盐之间扩散的半定量μLIBS绘图
IF 3.2 2区 化学
Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2024-10-24 DOI: 10.1016/j.sab.2024.107059
Baptiste Le Bellego , Vincent Motto-Ros , Béatrice Luais , Cécile Fabre , Célia Dalou , Pierre Condamine , Laurent Tissandier
{"title":"Semi-quantitative μLIBS mapping of germanium diffusion between metal and silicate during planetary core–mantle segregation","authors":"Baptiste Le Bellego ,&nbsp;Vincent Motto-Ros ,&nbsp;Béatrice Luais ,&nbsp;Cécile Fabre ,&nbsp;Célia Dalou ,&nbsp;Pierre Condamine ,&nbsp;Laurent Tissandier","doi":"10.1016/j.sab.2024.107059","DOIUrl":"10.1016/j.sab.2024.107059","url":null,"abstract":"<div><div>Understanding the distribution of elements between the cores and mantles of planetary bodies is essential for elucidating the geological and geochemical processes operating during their formation. Because the semi-metallic element Ge shows complex siderophile, chalcophile, and lithophile properties, it is particularly significant for investigating core–mantle segregation and ore deposit formation. Recent advancements in <em>in situ</em> microanalysis techniques, such as μLIBS, have enabled high-resolution elemental mapping of Ge and other trace elements.</div><div>This study explores the application of μLIBS imaging to investigate the high-temperature/high-pressure distribution of Ge between metallic and silicate matrices analogous to planetary cores and mantles. By cross-calibrating the μLIBS intensities with electron microprobe profile analyses carried out on piston cylinder experimental samples, we produced semi-quantitative Ge maps from which we extracted Ge concentration profiles to assess Ge diffusion from the silicate to the metal. We determined, for the first time, the diffusion coefficient of Ge between metal and silicate to be <em>D</em>(<em>Ge</em>)<sub>metal</sub> = 4.03E−13 ± 3.6E−14 m<sup>2</sup>/s at 1 GPa and 1350 °C. Our results demonstrate the capability and efficiency of μLIBS for providing detailed, high-resolution (15 μm) trace element concentration data at few ppm levels, offering a time- and cost-effective alternative to conventional techniques.</div><div>These findings bring insights on planetesimal differentiation and on chemical exchanges between metal and silicate phases in a magma ocean and between two different metal phases occurring at the bottom of the magma ocean during planetesimal formation.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"222 ","pages":"Article 107059"},"PeriodicalIF":3.2,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657596","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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