Spectrochimica Acta Part B: Atomic Spectroscopy最新文献

{"title":"LIBS for soil analysis: Effects of sample heating and high-voltage re-excitation on plasma characteristics","authors":"A. Ramírez-Buenrostro ,&nbsp;H. Sobral ,&nbsp;M. Amador-Mejía ,&nbsp;A. Robledo-Martinez","doi":"10.1016/j.sab.2025.107235","DOIUrl":"10.1016/j.sab.2025.107235","url":null,"abstract":"<div><div>While LIBS is a proven technique for monitoring elemental traces in soils, its signal-to-noise ratio is lower than comparable methods. Enhancement techniques such as sample heating and applying a high-voltage (HV) discharge have shown potential to increase emission and improve LIBS sensitivity. This study investigates the combined effect of these techniques on plasma morphology, physical parameters, and the validity of local thermodynamic equilibrium (LTE). Plasma was produced by a nanosecond Nd:YAG laser beam focused on loam soil samples at 22 and 400 °C. A high-voltage discharge lasting about 10 μs was applied 1.5 μs after the laser irradiation. Plasma morphology was studied using fast photography; electron density was obtained through Stark broadening and temperature from Saha-Boltzmann plots, both with spatial and temporal resolution. LTE was tested by McWhirter criterion and two criteria for nonhomogeneous and transient plasmas. Results showed that sample heating doubled plasma lifetime and increased emission, while the HV discharge enhanced emission but induced turbulence, accelerating plasma disruption. Plasma temperature increased by 16 % when the discharge was applied while an increment of 10 % was obtained with sample heating alone; electron density rose by 80 % in both cases. Combining both techniques, the temperature increased by approximately 20 % and electron density by 130 %. Along the axial direction, increases were almost uniform. Radially, higher increases occurred near the cathode. The differential displacement of the ion and neutral clouds suggests that the HV discharge induced species polarization. LTE criteria were satisfied for all studied scenarios, in the range from 500 nm to 10 μs, after the laser onset. Our findings suggest that increased electron density and temperature result in the enhanced spectral emission observed. Finally, a laser-induced plasma may sustain LTE even under re-excitation or external perturbations.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"230 ","pages":"Article 107235"},"PeriodicalIF":3.2,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083782","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}

{"title":"Corrigendum to “Total-reflection X-ray fluorescence analysis (TXRF) of plant's guttation fluids as a new, fast, and non-invasive strategy for the assessment of the bioavailability of Zn, Cd and Pb in contaminated soils” [Spectrochimica Acta Part B: Atomic Spectroscopy 230 (2025) 107217]","authors":"Carlo Porfido ,&nbsp;Ignazio Allegretta ,&nbsp;Eva Marguí ,&nbsp;Matteo Garau ,&nbsp;Maria Vittoria Pinna ,&nbsp;Concetta Eliana Gattullo ,&nbsp;Roberto Terzano ,&nbsp;Matteo Spagnuolo","doi":"10.1016/j.sab.2025.107226","DOIUrl":"10.1016/j.sab.2025.107226","url":null,"abstract":"","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"230 ","pages":"Article 107226"},"PeriodicalIF":3.2,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931894","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}

{"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(25)00112-0","DOIUrl":"10.1016/S0584-8547(25)00112-0","url":null,"abstract":"","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"229 ","pages":"Article 107227"},"PeriodicalIF":3.2,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928968","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}

{"title":"Effect of oxide pellet density on laser sampling for LIBS and LA-ICPMS","authors":"U.K. Maity ,&nbsp;J. Namitha ,&nbsp;D. Maji ,&nbsp;P. Manoravi","doi":"10.1016/j.sab.2025.107225","DOIUrl":"10.1016/j.sab.2025.107225","url":null,"abstract":"<div><div>Laser-induced breakdown spectroscopy (LIBS) and laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) are employed in this article to evaluate the effect of sintering and sample density on the measurements. Two sets of U-Zr oxide pellets of different mass densities are prepared by calcination at two different temperatures. The novelty of the present study is to determine the effect of U-Zr oxide pellet density on laser sampling for two independent techniques (LIBS and LA-ICPMS). The impact of sample density on figure-of-merits is discussed in detail. Sintering at higher temperatures in a reducing atmosphere (Ar/H₂) increases pellet density and improves signal intensity, correlation coefficient (<em>R</em>²), detection limit, precision, and accuracy for LIBS. A similar effect of pellet density is observed for LA-ICPMS result with 1064 nm Nd:YAG laser, whereas there is a negligible effect with 193 nm ArF excimer laser.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"230 ","pages":"Article 107225"},"PeriodicalIF":3.2,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928250","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}

{"title":"Depth profiling the elemental composition with negative muons: Monte Carlo based tools for improved data analysis","authors":"M. Cataldo ,&nbsp;A.D. Hillier ,&nbsp;O. Cremonesi ,&nbsp;F. Grazzi ,&nbsp;S. Porcinai ,&nbsp;M. Clemenza","doi":"10.1016/j.sab.2025.107224","DOIUrl":"10.1016/j.sab.2025.107224","url":null,"abstract":"<div><div>Gildings, patinas and alteration crusts are common features of many heritage artefacts, especially for metals. Their size depends on many factors, like the manufacturing method for gildings or the conservation state for alteration crusts: in some cases, it can be in the scale of the tens of microns. Such thickness would be difficult to investigate with classical non-destructive methods and would prevent getting information from the bulk of the sample. This work proposes an innovative approach for the study of multi-layered materials with the Muonic atom X-ray Emission Spectroscopy technique (μ-XES). Based on the detection of the high-energy X-rays emitted after the muon capture by the atom, this method is characterised by a remarkable penetration depth (from microns to cm). From the surface to the bulk, this technique can evaluate the variation of the elemental composition as a function of depth. The paper focuses on providing an improved interpretation of μ-XES data by coupling the analysis with the use of two Monte Carlo simulation software, GEANT4/ARBY and SRIM/TRIM. With these two software, it is possible to replicate the negative muon experiments and compare the experimental and simulated outputs to address the size of a given layer. To validate this approach, a set of standard gilded bronze and brass foils were measured at the ISIS Neutron and Muon source. From simulations, it was possible to evaluate the thickness of the superficial gold layer, with results in agreement with the preliminary SEM characterisation of the samples.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"230 ","pages":"Article 107224"},"PeriodicalIF":3.2,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928249","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}

{"title":"In-depth Stark broadening study of neutral oxygen 777 nm triplet","authors":"L. Gosse ,&nbsp;A. Favre ,&nbsp;A. Bultel ,&nbsp;V. Morel ,&nbsp;S. Djurović ,&nbsp;N. Simić ,&nbsp;L. Gavanski","doi":"10.1016/j.sab.2025.107222","DOIUrl":"10.1016/j.sab.2025.107222","url":null,"abstract":"<div><div>In this study, the Stark broadening of the visible triplet of neutral oxygen was caracterised. To cover a wide range of electron densities, the study relies on two joint experimental campaigns: one on laser-induced plasma and the other on wall-stabilized arc. Measuring the Stark impact factor associated with the triplet requires, in addition to an accurate measurement of electron density and temperature, isolating the Lorentzian Stark contribution by deconvoluting the experimental spectral profile. This measurement will allow, for any observation where the triplet is unresolved and/or suffers from line overlapping, to estimate the electron density or perform elemental quantification from the total broadening of the O <span><math><mn>777</mn></math></span> nm triplet.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"230 ","pages":"Article 107222"},"PeriodicalIF":3.2,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931326","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}

{"title":"Influence of laser energy on spectral properties of annular laser-induced plasma","authors":"Mianyun Ye,&nbsp;Jingge Wang,&nbsp;Bo Dai,&nbsp;Yonghao Han,&nbsp;Hehe Li","doi":"10.1016/j.sab.2025.107223","DOIUrl":"10.1016/j.sab.2025.107223","url":null,"abstract":"<div><div>Laser energy is a key experimental parameter affecting the analytical performance of LIBS. In order to investigate the characteristics of the plasma formed by an annular beam, an axicon was used to convert the Gaussian laser beam emitted from a Q-switched Nd:YAG laser into an annular laser beam. The annular beam was used to ablate the alloy steel sample to produce plasma. The influence of laser energy on the spectral emission and spatial evolution characteristics of the annular plasma was investigated. The results show that the melting of the material in the region where the annular beam interacts with the sample is more homogeneous than the melting material ablated by the Gaussian beam. The spectral line intensity, plasma temperature and electron density increase with the increase of the laser energy. The Signal-to-Background Ratio (SBR) increasing rapidly first, and then slowing down when the energy exceeds 145 mJ. The two-dimensional spatial distribution of the spectral intensity shows a flat shape, with two peaks along the transverse direction of the plasma, and the distance between the peaks corresponds to the size of the annular ablation crater. The increase in laser energy causes the faster expansion and the smaller gradient of the spectral line intensity change in the central region of the annular plasma. The positions of the two peaks along the transverse direction of the annular plasma are shifted away from the center with the increase of the laser energy. The two-dimensional spatial distribution of the plasma temperature and electron density also illustrates the coupling between the various regions of the annular plasma resulting in a more homogeneous region inside the plasma.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"230 ","pages":"Article 107223"},"PeriodicalIF":3.2,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903795","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}

{"title":"Discrimination of single acrylic fibers focusing on zinc for forensic investigation using nanobeam synchrotron radiation X-ray fluorescence imaging and X-ray absorption fine structure analysis","authors":"Keita Miyazaki ,&nbsp;Masanobu Mori ,&nbsp;Yasuo Seto ,&nbsp;Yoshinori Nishiwaki","doi":"10.1016/j.sab.2025.107219","DOIUrl":"10.1016/j.sab.2025.107219","url":null,"abstract":"<div><div>The identification of single acrylic fibers is critical in forensic science. Spinning solvents and dyes containing zinc are used to produce acrylic fibers. However, the information has not been used to identify acrylic single fibers for forensic purposes. This study aimed to discriminate between single acrylic fibers by focusing on zinc. A single type of red acrylic fiber from the Forensic Science Fiber Collection (Microtrace LLC, USA) was used as the standard sample. In contrast, nine commercially available colored acrylic fibers were used as samples. Owing to the limited beam time of synchrotron radiation X-ray analysis, total reflection X-ray fluorescence (TXRF) was used as a trace element screening method. Nanobeam synchrotron radiation X-ray fluorescence (SR-XRF) imaging of thinned acrylic single-fiber cross-sections was conducted to visualize the distribution of trace elements within a single fiber. X-ray absorption fine structure (XAFS) analysis was conducted to investigate the chemical states of zinc in the single acrylic fibers. The nanobeam SR-XRF imaging enabled the visualization of zinc derived from dyes and spinning solvents in single-fiber cross-sections. The images were classified into three distinct patterns. Two types of X-ray absorption near edge structure (XANES) spectra of the zinc absorption edge, reflecting the difference in the chemical state of zinc, were obtained from the acrylic single-fiber sample. In conclusion, the distribution and chemical state of zinc were found to be powerful indicators for distinguishing single acrylic fibers.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"230 ","pages":"Article 107219"},"PeriodicalIF":3.2,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891623","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}

{"title":"Determination of the calorific value and ash content of coal using the analysis of primary X-ray radiation scattering spectra","authors":"Ivan Sverchkov","doi":"10.1016/j.sab.2025.107221","DOIUrl":"10.1016/j.sab.2025.107221","url":null,"abstract":"<div><div>The study presents a new approach to the determination of the main fuel characteristics of coals, such as calorific value and ash content, using wavelength dispersive X-ray fluorescence analysis (WDXRF) in combination with partial least squares (PLS) regression. The Compton and Rayleigh scattering spectra of the primary radiation of the X-ray tube served as the basis for the quantitative assessment of these indicators.</div><div>The effect that spectral resolution has on the quality of the prediction was also assessed in the study. It was found that increasing the spectral resolution increases the accuracy of predicting the calorific value and ash content of coals. The use of a LiF (220) crystal analyzer in combination with a high-resolution collimator provided a root-mean-square error of 0.52 MJ/kg for an average calorific value of 29.06 MJ/kg, and 1.70 wt% for an average ash content of 9.20 wt% in validating the training set data. Although the current results of coal quality analysis obtained on the basis of primary X-ray scattering spectra cannot replace the already accepted methods, the presented approach can provide useful information for rapid assessment of coal quality and can be used in automated systems for quality control of incoming fuel.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"230 ","pages":"Article 107221"},"PeriodicalIF":3.2,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887654","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}

{"title":"Antimony isotope-delta values of pure mono-elemental solutions measured by Instrumental Neutron Activation Analysis","authors":"Giancarlo D'Agostino,&nbsp;Luigi Bergamaschi,&nbsp;Marco Di Luzio","doi":"10.1016/j.sab.2025.107220","DOIUrl":"10.1016/j.sab.2025.107220","url":null,"abstract":"<div><div>A method based on Instrumental Neutron Activation Analysis was established for the determination of isotope-delta values of pure Sb mono-elemental solutions. The measurement equation was developed to model all quantities related to the physical principles of nuclear neutron activation and instrumental effects of <span><math><mi>γ</mi></math></span>-spectrometry. The method was applied and tested in case the isotope-delta value is known to be zero to highlight systematic errors and evaluate the achievable uncertainty. A negligible 0.01 ‰ deviation was observed from the expected zero value with a 0.24 ‰ combined uncertainty due to counting statistics and pointed out to be the main contributor by the budget compiled using the developed measurement equation. The achieved uncertainty, close to the ultimate limit of INAA in isotopic abundance determinations, makes the method competitive for linking secondary to primary Sb isotopic reference solutions.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"230 ","pages":"Article 107220"},"PeriodicalIF":3.2,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879194","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}