Spectrochimica Acta Part B: Atomic Spectroscopy最新文献

{"title":"Real-time monitoring of trace noble gases using laser-induced breakdown spectroscopy—An investigation of the impact of bulk gas on plasma properties and sensitivity","authors":"Hunter B. Andrews ,&nbsp;Zechariah B. Kitzhaber ,&nbsp;Joanna McFarlane","doi":"10.1016/j.sab.2025.107237","DOIUrl":"10.1016/j.sab.2025.107237","url":null,"abstract":"<div><div>The impact of Ar and He bulk gases on laser-induced breakdown spectroscopy (LIBS) real-time monitoring of trace Xe and Kr was assessed. LIBS is being developed as a monitoring tool for measuring noble gas transport in molten salt systems, in which traditional sensors may face challenges associated with radiation, corrosive materials, and/or mixed phases. The plasma temperature and electron densities of LIBS plasmas were measured in both static and various flowing Ar and He streams (0–5 L min⁻¹). The use of an Ar bulk gas resulted in higher plasma temperature, greater electron densities by an order of magnitude, and extended plasma lifetime compared with when He bulk gas was used. Gas flow rate was found to have little impact on plasma temperature; however, its effect on electron density was significant, indicating the need to consider flow rate–specific models. Matrix effects on emission peaks were reported for both bulk gases. Due to these matrix effects, multivariate models were developed for Xe and Kr ranging from 0 to 700 ppm in both bulk gases. Although the predictive behavior was similar (root mean square error of prediction ranging from 11.1 to 20.6 ppm), the limits of detection were superior in He (Xe: 22.9 ppm, Kr: 30.4 ppm). These models were employed in demonstrative real-time tests (&gt;1 h), which showed strong predictive precision (relative standard deviation &lt;5 %) regardless of the bulk gas. Ultimately, this study provides a guide for the considerations required when developing gaseous LIBS models for real-time monitoring.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"230 ","pages":"Article 107237"},"PeriodicalIF":3.2,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144106933","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":"An underwater microimage long-pulse LIBS system: Development and preliminary testing","authors":"Mingda Sui ,&nbsp;Bin Zhao ,&nbsp;Ziwen Jia ,&nbsp;Yuanyuan Xue ,&nbsp;Qingsheng Liu ,&nbsp;Meng Li ,&nbsp;Ye Tian ,&nbsp;Yuan Lu ,&nbsp;Xilin Zhang ,&nbsp;Jinjia Guo","doi":"10.1016/j.sab.2025.107234","DOIUrl":"10.1016/j.sab.2025.107234","url":null,"abstract":"<div><div>In recent years, underwater systems based on Laser-Induced Breakdown Spectroscopy (LIBS) technology have successfully performed elemental analysis of seawater and seabed minerals. Long-pulse LIBS has demonstrated its advantages for deep-sea mineral in-situ detection. However, current reports on deep-sea long-pulse LIBS systems face challenges such as large system size, the requirement for commercial long-pulse laser, and the lack of synchronized imaging capabilities. These issues have somewhat hindered the further application of long-pulse LIBS in deep-sea exploration. This paper presents, for the first time, a miniaturized deep-sea long-pulse LIBS in-situ detection system with integrated microscopic imaging capabilities (iLIBSea). The system uses a custom-designed, commercially available compact long-pulse laser, and incorporates a synchronized microscopic imaging module with a 1.46*1.46 mm field of view and a lateral resolution of 7.8 μm. The system has a maximum operational depth of 5000 m and a total weight of 60 kg. Through special design, the ultraviolet spectral signal is preserved to the maximum extent. High-quality spectral detection was achieved with a low energy of 4 mJ, and the detection limits for Cu and Mn were determined to be 97.1 ppm and 21.7 ppm, respectively. And the long-pulse LIBS was able to acquire high-quality spectra even under simulated 50 MPa pressure conditions. With the further system miniaturization, the long-pulse LIBS system would be widely used in deep-sea mineral exploration.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"230 ","pages":"Article 107234"},"PeriodicalIF":3.2,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115303","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":"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}