Spectrochimica Acta Part B: Atomic Spectroscopy最新文献

英文中文

Evaluation of analyte transfer rates and excitation conditions in the SC-GD by absorption and emission spectrometry 通过吸收和发射光谱法评估 SC-GD 中的分析物转移率和激发条件

IF 3.2 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-04-12 DOI: 10.1016/j.sab.2025.107216

Yinchenxi Zhang, Jaime Orejas, María del Mar González del Campo, Jorge Pisonero, Nerea Bordel

The solution cathode glow discharge (SCGD) is a compact atomization/excitation source sustained under ambient air using an aqueous solution as discharge cathode, offering limits of detection (LODs) for many elements in the periodic table within the mid to low ng/mL range when coupled to optical emission spectrometry (OES). Formic acid (HCOOH) is frequently included in the incoming solution as an additive for improved sensitivity; however, some reports have shown that the benefit of this additive depends on the concomitant ions present in the solution. It is widely assumed that the improvement in the analytical sensitivity comes from an enhanced sampling efficiency produced by a higher analyte transfer rate caused by HCOOH; accordingly, the coexisting ions are considered to alter the impact of this additive, probably through changing analyte transfer rates at the liquid-plasma interface. This work aims to provide a perspective of the analyte solution-to-plasma transfer in the SCGD at relevant solution content by means of atomic absorption spectrometry (AAS). For this purpose, a SCGD-AAS system was built and characterized using a pulsed Xenon lamp as radiation source. The absorption signals, together with the emission signals, corresponding to resonant transitions of Mg I (285.2 nm), Cu I (324.7 nm), Ag I (328.1 nm) and Li I (670.8 nm) were recorded at the following situations: (1) cation or anion concentrations up to 60 mM, including Na⁺, Ca²⁺, NO₃⁻ or Cl⁻; (2) HCOOH at concentrations ranging 0–7 %; (3) co-presence of the mentioned ions and HCOOH. The results provide information to discuss the influence of common coexisting cations and anions in real samples, together with the addition of a common sensitivity enhancer, HCOOH, on analyte transfer mechanisms in the SCGD, to understand the general working fundamentals of the technique and possible matrix effects when combined with OES detection.

{"title":"Evaluation of analyte transfer rates and excitation conditions in the SC-GD by absorption and emission spectrometry","authors":"Yinchenxi Zhang, Jaime Orejas, María del Mar González del Campo, Jorge Pisonero, Nerea Bordel","doi":"10.1016/j.sab.2025.107216","DOIUrl":"10.1016/j.sab.2025.107216","url":null,"abstract":"<div><div>The solution cathode glow discharge (SCGD) is a compact atomization/excitation source sustained under ambient air using an aqueous solution as discharge cathode, offering limits of detection (LODs) for many elements in the periodic table within the mid to low ng/mL range when coupled to optical emission spectrometry (OES). Formic acid (HCOOH) is frequently included in the incoming solution as an additive for improved sensitivity; however, some reports have shown that the benefit of this additive depends on the concomitant ions present in the solution. It is widely assumed that the improvement in the analytical sensitivity comes from an enhanced sampling efficiency produced by a higher analyte transfer rate caused by HCOOH; accordingly, the coexisting ions are considered to alter the impact of this additive, probably through changing analyte transfer rates at the liquid-plasma interface. This work aims to provide a perspective of the analyte solution-to-plasma transfer in the SCGD at relevant solution content by means of atomic absorption spectrometry (AAS). For this purpose, a SCGD-AAS system was built and characterized using a pulsed Xenon lamp as radiation source. The absorption signals, together with the emission signals, corresponding to resonant transitions of Mg I (285.2 nm), Cu I (324.7 nm), Ag I (328.1 nm) and Li I (670.8 nm) were recorded at the following situations: (1) cation or anion concentrations up to 60 mM, including Na<sup>+</sup>, Ca<sup>2+</sup>, NO<sub>3</sub><sup>−</sup> or Cl<sup>−</sup>; (2) HCOOH at concentrations ranging 0–7 %; (3) co-presence of the mentioned ions and HCOOH. The results provide information to discuss the influence of common coexisting cations and anions in real samples, together with the addition of a common sensitivity enhancer, HCOOH, on analyte transfer mechanisms in the SCGD, to understand the general working fundamentals of the technique and possible matrix effects when combined with OES detection.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"229 ","pages":"Article 107216"},"PeriodicalIF":3.2,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848334","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

A brief revision of the suspension-assisted direct solid analysis by TXRF spectrometry

IF 3.2 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-04-12 DOI: 10.1016/j.sab.2025.107214

Ramón Fernández-Ruiz

This brief revision compiles and reexamines the general strategy developed thus far for quantifying the elemental composition of solid materials using TXRF without employing acid chemical manipulation based on the previous suspension of the solid samples. This kind of analysis converts to the TXRF methodology in a green chemical analytical alternative with higher care for the environment and low analytical cost. The reviewed TXRF methodology is the sum of a Suspension Assisted (SA), which uses grinding, ultrasound, and surfactant addition, in conjunction with the Direct Solid Analysis (DSA), where the continuous agitation of suspension, internal standardisation and final deposition are made for the quantitative analysis by means TXRF. A general TXRF solid suspension analysis (SA/DSA-TXRF) protocol is proposed and applied to analyse a commercial sample of bentonite clay used for cosmetic applications as a typical sample example. Several critical questions related to the general process of suspension and deposition are discussed. Two crucial examples are the correct transfer of the suspended sample, which can lead to high uncertainties, and the impact of deposition morphology. Finally, a simple empirical procedure is presented using the analytical results obtained in the commercial bentonite sample to evaluate methodological, roughness, and instrumental uncertainties in the SA/DSA-TXRF proposed methodology.

{"title":"A brief revision of the suspension-assisted direct solid analysis by TXRF spectrometry","authors":"Ramón Fernández-Ruiz","doi":"10.1016/j.sab.2025.107214","DOIUrl":"10.1016/j.sab.2025.107214","url":null,"abstract":"<div><div>This brief revision compiles and reexamines the general strategy developed thus far for quantifying the elemental composition of solid materials using TXRF without employing acid chemical manipulation based on the previous suspension of the solid samples. This kind of analysis converts to the TXRF methodology in a green chemical analytical alternative with higher care for the environment and low analytical cost. The reviewed TXRF methodology is the sum of a Suspension Assisted (SA), which uses grinding, ultrasound, and surfactant addition, in conjunction with the Direct Solid Analysis (DSA), where the continuous agitation of suspension, internal standardisation and final deposition are made for the quantitative analysis by means TXRF. A general TXRF solid suspension analysis (SA/DSA-TXRF) protocol is proposed and applied to analyse a commercial sample of bentonite clay used for cosmetic applications as a typical sample example. Several critical questions related to the general process of suspension and deposition are discussed. Two crucial examples are the correct transfer of the suspended sample, which can lead to high uncertainties, and the impact of deposition morphology. Finally, a simple empirical procedure is presented using the analytical results obtained in the commercial bentonite sample to evaluate methodological, roughness, and instrumental uncertainties in the SA/DSA-TXRF proposed methodology.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"229 ","pages":"Article 107214"},"PeriodicalIF":3.2,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829364","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

Quantification of ZnSO4 in aqueous solution by liquid-solid matrix transfer and double-pulse laser-induced breakdown spectroscopy 利用液固基质转移和双脉冲激光诱导击穿光谱定量水溶液中的 ZnSO4

IF 3.2 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-04-11 DOI: 10.1016/j.sab.2025.107215

Peter Gschwandtner , Florian Rudinger , Stefan Trautner , Christoph Ramsauer , Georg Hölzl , Thomas Röder , Johannes D. Pedarnig

The concentration of zinc sulfate in aqueous solution was measured by double-pulse (DP) laser-induced breakdown spectroscopy (LIBS). ZnSO₄ is an essential chemical in the spin bath liquid used for industrial production of viscose fibers from cellulose. For DP-LIBS the ZnSO₄ analyte was transferred from the water matrix to a solid cellulose matrix (commercial filtration paper). Various emission lines of Zn in the UV/VIS range were measured at 560 different positions on the dried paper sample. The line intensities were strongly varying across the sample as observed by LIBS imaging. Signal analysis revealed broad and bimodal distributions of intensities. Normalization of analyte intensities to emission lines from the matrix reduced the apparent inhomogeneity of samples and achieved monomodal signal histograms and good analytical figures of merit. The mean error of predicted concentration of ZnSO₄ in aqueous solutions was 0.19 g/L (samples with concentration C_ZnSO4 = 0–11 g/L). Applications of DP-LIBS in viscose fiber production is envisaged.

{"title":"Quantification of ZnSO4 in aqueous solution by liquid-solid matrix transfer and double-pulse laser-induced breakdown spectroscopy","authors":"Peter Gschwandtner , Florian Rudinger , Stefan Trautner , Christoph Ramsauer , Georg Hölzl , Thomas Röder , Johannes D. Pedarnig","doi":"10.1016/j.sab.2025.107215","DOIUrl":"10.1016/j.sab.2025.107215","url":null,"abstract":"<div><div>The concentration of zinc sulfate in aqueous solution was measured by double-pulse (DP) laser-induced breakdown spectroscopy (LIBS). ZnSO<sub>4</sub> is an essential chemical in the spin bath liquid used for industrial production of viscose fibers from cellulose. For DP-LIBS the ZnSO<sub>4</sub> analyte was transferred from the water matrix to a solid cellulose matrix (commercial filtration paper). Various emission lines of Zn in the UV/VIS range were measured at 560 different positions on the dried paper sample. The line intensities were strongly varying across the sample as observed by LIBS imaging. Signal analysis revealed broad and bimodal distributions of intensities. Normalization of analyte intensities to emission lines from the matrix reduced the apparent inhomogeneity of samples and achieved monomodal signal histograms and good analytical figures of merit. The mean error of predicted concentration of ZnSO<sub>4</sub> in aqueous solutions was 0.19 g/L (samples with concentration C<sub>ZnSO4</sub> = 0–11 g/L). Applications of DP-LIBS in viscose fiber production is envisaged.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"229 ","pages":"Article 107215"},"PeriodicalIF":3.2,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829365","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

IF 3.2 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-04-08 DOI: 10.1016/S0584-8547(25)00091-6

引用次数: 0

Elsevier/Spectrochimica Acta Atomic Spectroscopy Award 2024

IF 3.2 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-04-04 DOI: 10.1016/j.sab.2025.107205

Alessandro De Giacomo

引用次数: 0

Radiative recombination as a transient spectroscopic fingerprint for sample oxidation using laser-induced XUV spectroscopy (LIXS)

IF 3.2 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-04-03 DOI: 10.1016/j.sab.2025.107203

Sharath Rameshbabu , Davide Bleiner

The deconvolution of Laser-Induced XUV Spectroscopy (LIXS) recombination signals for d-block transition and heavy metals, in hot and dense plasmas, was studied. Using a self-developed XUV spectrograph, ion stages of nickel (Ni) and gold (Au) under varying electron densities and plasma temperatures were investigated. The results revealed stabilization of specific ion species, with Ni favoring Ne-like configurations and Au exhibiting complex d-f orbital interactions. Supported by non-local thermodynamic equilibrium (NLTE) simulations, this study provides insights into plasma ionization dynamics and the robustness of closed-shell configurations as oxidation state proxies, enhancing LIXS applications in material analysis.

研究了热高密度等离子体中 d 块过渡金属和重金属的激光诱导 XUV 光谱（LIXS）重组信号的解卷积。利用自行开发的 XUV 光谱仪，研究了不同电子密度和等离子体温度下镍（Ni）和金（Au）的离子阶段。研究结果表明，特定的离子种类趋于稳定，镍倾向于类氖构型，而金则表现出复杂的 d-f 轨道相互作用。在非局部热力学平衡（NLTE）模拟的支持下，这项研究深入揭示了等离子体电离动力学以及闭壳构型作为氧化态代理的稳健性，从而提高了钼碘氙在材料分析中的应用。

引用次数: 0

LIBSFormer: Enhancing Mars in-situ LIBS data analysis with accurate and interpretable quantification of oxides

IF 3.2 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-04-03 DOI: 10.1016/j.sab.2025.107204

Sicong Liu, Zhuoxian Zhang, Jie Zhang, Kecheng Du, Xiaohua Tong, Huan Xie, Yongjiu Feng, Yanmin Jin

Accurate detection of the Martian surface composition is crucial for exploring signs of life on Mars. Since the Curiosity rover landed on Mars in 2012, Laser-Induced Breakdown Spectroscopy (LIBS) has been extensively utilized for in-situ analysis of Martian surface materials. However, multivariate methods employed for the quantitative analysis of LIBS data face challenges, including low feature extraction efficiency, insufficient interpretability, and poor generalizability. In this paper, we propose a novel Transformer-based approach for quantitative analysis of oxides in LIBS data, namely LIBSFormer. LIBSFormer employs the self-attention mechanism to automatically and holistically extract elemental features, associating information across the spectrum in a single step. Furthermore, we propose a wavelength-aware tokenization strategy for training, along with an element-driven approach for model selection, enhancing both model interpretability and reliability. The experimental results on the ChemCam LIBS RDR dataset demonstrate that LIBSFormer exhibits superior accuracy and stability in the quantitative analysis of Mars in-situ LIBS data, outperforming the state-of-the-art methods. The average Root Mean Square Error (RMSE) of LIBSFormer is 0.2199 wt%, with a Standard Deviation (SD) value of 0.0177 wt%. In comparison to the Convolutional Neural Networks (CNNs), LIBSFormer reduces the RMSE by 47.7 % and SD by 69.0 %, with similar results achieved on the ChemCam calibration dataset. With regard to interpretability, the attention weights of the feature extraction process have demonstrated that LIBSFormer is capable of effectively extracting key spectral lines with an accuracy of 90.0 %. These findings suggest that LIBSFormer has potential applications in high-accuracy quantitative analysis of Mars in-situ LIBS data.

{"title":"LIBSFormer: Enhancing Mars in-situ LIBS data analysis with accurate and interpretable quantification of oxides","authors":"Sicong Liu, Zhuoxian Zhang, Jie Zhang, Kecheng Du, Xiaohua Tong, Huan Xie, Yongjiu Feng, Yanmin Jin","doi":"10.1016/j.sab.2025.107204","DOIUrl":"10.1016/j.sab.2025.107204","url":null,"abstract":"<div><div>Accurate detection of the Martian surface composition is crucial for exploring signs of life on Mars. Since the Curiosity rover landed on Mars in 2012, Laser-Induced Breakdown Spectroscopy (LIBS) has been extensively utilized for in-situ analysis of Martian surface materials. However, multivariate methods employed for the quantitative analysis of LIBS data face challenges, including low feature extraction efficiency, insufficient interpretability, and poor generalizability. In this paper, we propose a novel Transformer-based approach for quantitative analysis of oxides in LIBS data, namely LIBSFormer. LIBSFormer employs the self-attention mechanism to automatically and holistically extract elemental features, associating information across the spectrum in a single step. Furthermore, we propose a wavelength-aware tokenization strategy for training, along with an element-driven approach for model selection, enhancing both model interpretability and reliability. The experimental results on the ChemCam LIBS RDR dataset demonstrate that LIBSFormer exhibits superior accuracy and stability in the quantitative analysis of Mars in-situ LIBS data, outperforming the state-of-the-art methods. The average Root Mean Square Error (RMSE) of LIBSFormer is 0.2199 wt%, with a Standard Deviation (SD) value of 0.0177 wt%. In comparison to the Convolutional Neural Networks (CNNs), LIBSFormer reduces the RMSE by 47.7 % and SD by 69.0 %, with similar results achieved on the ChemCam calibration dataset. With regard to interpretability, the attention weights of the feature extraction process have demonstrated that LIBSFormer is capable of effectively extracting key spectral lines with an accuracy of 90.0 %. These findings suggest that LIBSFormer has potential applications in high-accuracy quantitative analysis of Mars in-situ LIBS data.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"229 ","pages":"Article 107204"},"PeriodicalIF":3.2,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791488","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

Long-pulsed laser-induced breakdown spectroscopy for elemental imaging: An evaluation with human teeth

IF 3.2 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-04-01 DOI: 10.1016/j.sab.2025.107201

Shoujie Li , Fei Teng , Lihui Ren , Qun Yan , Wangquan Ye , Ye Tian , Ying Li , Jinjia Guo , Yoshihiro Deguchi , Ronger Zheng , Xin Zhang , Yuan Lu

Laser-induced breakdown spectroscopy (LIBS) is a practical technique for chemical imaging by analyzing elemental emissions. The utilization of long-pulsed lasers has been proven to enhance LIBS detection in water and air. However, the application of long-pulsed LIBS in imaging remains unexplored. In this study, we employed a laser with a pulse width of 100 ns for LIBS imaging to obtain elemental distribution using a human tooth as sample for performance evaluation. It is demonstrated that the tooth layer can be effectively resolved with distinct boundaries under the long-pulsed LIBS. When compared with a 10-ns pulsed laser, the LIBS emissions were generally enhanced under the long-pulse laser, resulting in improved chemical imaging capabilities. This enhancement might be attributed to higher mass consumption achieved through prolonged excitation. After examining plasma properties, it was found that the long-pulsed LIBS exhibited higher sensitivity towards changes in tooth layers. Furthermore, the molecular emission was significantly amplified under long-pulsed LIBS. The compositional distribution is also trackable using these molecular emissions, and more information could be extracted by referencing the correlation between element and molecules. Therefore, utilizing a long pulse laser can serve as an effective approach to enhance chemical imaging in LIBS analysis while providing alternative options such as molecular mapping.

激光诱导击穿光谱（LIBS）是一种通过分析元素发射进行化学成像的实用技术。事实证明，利用长脉冲激光可增强 LIBS 在水和空气中的检测能力。然而，长脉冲 LIBS 在成像中的应用仍有待探索。在本研究中，我们使用了脉宽为 100 ns 的激光进行 LIBS 成像，以人类牙齿为样本获取元素分布，并进行性能评估。结果表明，在长脉冲 LIBS 的作用下，可以有效地分辨出边界清晰的牙层。与 10-ns 脉冲激光相比，长脉冲激光下的 LIBS 发射普遍增强，从而提高了化学成像能力。这种增强可能归因于通过长时间激发实现了更高的质量消耗。在检查等离子体特性后发现，长脉冲 LIBS 对齿层的变化表现出更高的灵敏度。此外，在长脉冲 LIBS 下，分子发射被明显放大。利用这些分子发射还可以跟踪成分分布，并通过参考元素与分子之间的相关性提取更多信息。因此，利用长脉冲激光可以作为一种有效的方法，在 LIBS 分析中增强化学成像，同时提供分子绘图等其他选择。

{"title":"Long-pulsed laser-induced breakdown spectroscopy for elemental imaging: An evaluation with human teeth","authors":"Shoujie Li , Fei Teng , Lihui Ren , Qun Yan , Wangquan Ye , Ye Tian , Ying Li , Jinjia Guo , Yoshihiro Deguchi , Ronger Zheng , Xin Zhang , Yuan Lu","doi":"10.1016/j.sab.2025.107201","DOIUrl":"10.1016/j.sab.2025.107201","url":null,"abstract":"<div><div>Laser-induced breakdown spectroscopy (LIBS) is a practical technique for chemical imaging by analyzing elemental emissions. The utilization of long-pulsed lasers has been proven to enhance LIBS detection in water and air. However, the application of long-pulsed LIBS in imaging remains unexplored. In this study, we employed a laser with a pulse width of 100 ns for LIBS imaging to obtain elemental distribution using a human tooth as sample for performance evaluation. It is demonstrated that the tooth layer can be effectively resolved with distinct boundaries under the long-pulsed LIBS. When compared with a 10-ns pulsed laser, the LIBS emissions were generally enhanced under the long-pulse laser, resulting in improved chemical imaging capabilities. This enhancement might be attributed to higher mass consumption achieved through prolonged excitation. After examining plasma properties, it was found that the long-pulsed LIBS exhibited higher sensitivity towards changes in tooth layers. Furthermore, the molecular emission was significantly amplified under long-pulsed LIBS. The compositional distribution is also trackable using these molecular emissions, and more information could be extracted by referencing the correlation between element and molecules. Therefore, utilizing a long pulse laser can serve as an effective approach to enhance chemical imaging in LIBS analysis while providing alternative options such as molecular mapping.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"229 ","pages":"Article 107201"},"PeriodicalIF":3.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768928","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

Energy-dispersive X-ray fluorescence analysis of uranium-contaminated stainless-steel surfaces by eliminating the iron sum peak using a titanium filter

IF 3.2 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-04-01 DOI: 10.1016/j.sab.2025.107200

Ukyou Yanagisawa , Hui Wang , Tsugufumi Matsuyama , Yasuhiro Sakai , Hiroshi Yoshii

During energy-dispersive X-ray fluorescence (EDXRF) measurements of stainless steel, sum peaks originating from iron are frequently observed. Among these, the Fe Kα + Kβ sum peak overlaps with the U Lα peak, complicating the analysis of uranium contamination on stainless-steel surfaces. While secondary X-ray filters can mitigate such sum peaks, integrating them into commercially available portable EDXRF analyzers poses technical challenges. This study presents a straightforward method for eliminating iron sum peak interference. A titanium foil, placed over the uranium-contaminated area on a stainless-steel surface, attenuates incident X-rays while allowing significantly higher transmission of U Lα X-rays than Fe K X-rays. EDXRF measurements were conducted on uranium-contaminated stainless-steel models using a portable EDXRF spectrometer equipped with a titanium foil of optimized thickness as a filter. In the resulting EDXRF spectrum, the intensity of the U Lα peak showed a direct correlation with the uranium content, enabling accurate detection of uranium levels as low as 61 ng. The proposed method achieves a uranium detection sensitivity approximately 100 times greater than conventional α-survey meter methods.

{"title":"Energy-dispersive X-ray fluorescence analysis of uranium-contaminated stainless-steel surfaces by eliminating the iron sum peak using a titanium filter","authors":"Ukyou Yanagisawa , Hui Wang , Tsugufumi Matsuyama , Yasuhiro Sakai , Hiroshi Yoshii","doi":"10.1016/j.sab.2025.107200","DOIUrl":"10.1016/j.sab.2025.107200","url":null,"abstract":"<div><div>During energy-dispersive X-ray fluorescence (EDXRF) measurements of stainless steel, sum peaks originating from iron are frequently observed. Among these, the Fe Kα + Kβ sum peak overlaps with the U Lα peak, complicating the analysis of uranium contamination on stainless-steel surfaces. While secondary X-ray filters can mitigate such sum peaks, integrating them into commercially available portable EDXRF analyzers poses technical challenges. This study presents a straightforward method for eliminating iron sum peak interference. A titanium foil, placed over the uranium-contaminated area on a stainless-steel surface, attenuates incident X-rays while allowing significantly higher transmission of U Lα X-rays than Fe K X-rays. EDXRF measurements were conducted on uranium-contaminated stainless-steel models using a portable EDXRF spectrometer equipped with a titanium foil of optimized thickness as a filter. In the resulting EDXRF spectrum, the intensity of the U Lα peak showed a direct correlation with the uranium content, enabling accurate detection of uranium levels as low as 61 ng. The proposed method achieves a uranium detection sensitivity approximately 100 times greater than conventional α-survey meter methods.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"229 ","pages":"Article 107200"},"PeriodicalIF":3.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785917","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

Accurate determination of uranium isotope abundances by wavelength modulation spectroscopy in atomic beams

IF 3.2 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-04-01 DOI: 10.1016/j.sab.2025.107202

Wei Wei, Alonso Castro

The design and demonstration of an optical analysis system based on wavelength modulation spectroscopy in an atomic beam for uranium isotope abundance determinations is presented. This system probes the uranium 5f³6d7s² (⁵L₆) → 5f²6d²7s² (⁵K₅) transition at 861.031 nm, which is considered to be the most suitable transition for uranium isotopic analysis. A new laser characterization strategy was developed for the conditions where optimum laser wavelength modulation depth was small compared to the free spectral range (FSR) of etalons. Two capabilities enabled the higher-precision determination of isotope abundances of atomic beams: (1) reduction of low-frequency additive noise, especially the noise caused by black-body radiation and (2) suppression of non-absorption transmission losses. The performance of this system was validated with uranium samples of various isotopic compositions. By comparing the measurements using natural uranium samples between the direct absorption and the wavelength modulation approaches, a 21-fold decrease in uncertainty of the integrated absorbance and a 6.8-fold improvement in the 1-σ precision of the number density were achieved. In addition, by comparing the results using uranium oxide samples, a 6.1-fold decrease in the uncertainty of inferred isotope abundance was obtained. These results demonstrate that the 1f-normalized 2f wavelength modulation spectroscopy (WMS-2f/1f) technique enables higher-precision analysis of atomic beams.

本文介绍了基于原子束波长调制光谱的光学分析系统的设计和演示，该系统用于铀同位素丰度测定。该系统探测了波长为 861.031 nm 的铀 5f36d7s2 (5L6) → 5f26d27s2 (5K5) 转变，该转变被认为是最适合铀同位素分析的转变。在最佳激光波长调制深度小于蚀刻子自由光谱范围（FSR）的条件下，开发了一种新的激光表征策略。该系统具有两项功能，能够更精确地测定原子束的同位素丰度：（1）减少低频附加噪声，特别是黑体辐射引起的噪声；（2）抑制非吸收传输损耗。使用不同同位素组成的铀样品对该系统的性能进行了验证。通过比较直接吸收法和波长调制法对天然铀样品的测量结果，综合吸光度的不确定性降低了 21 倍，数量密度的 1-σ 精确度提高了 6.8 倍。此外，通过比较使用氧化铀样品得出的结果，推断同位素丰度的不确定性降低了 6.1 倍。这些结果表明，1f 归一化 2f 波长调制光谱（WMS-2f/1f）技术能够对原子束进行更高精度的分析。

{"title":"Accurate determination of uranium isotope abundances by wavelength modulation spectroscopy in atomic beams","authors":"Wei Wei, Alonso Castro","doi":"10.1016/j.sab.2025.107202","DOIUrl":"10.1016/j.sab.2025.107202","url":null,"abstract":"<div><div>The design and demonstration of an optical analysis system based on wavelength modulation spectroscopy in an atomic beam for uranium isotope abundance determinations is presented. This system probes the uranium 5f<sup>3</sup>6d7s<sup>2</sup> (<sup>5</sup>L<sub>6</sub>) → 5f<sup>2</sup>6d<sup>2</sup>7s<sup>2</sup> (<sup>5</sup>K<sub>5</sub>) transition at 861.031 nm, which is considered to be the most suitable transition for uranium isotopic analysis. A new laser characterization strategy was developed for the conditions where optimum laser wavelength modulation depth was small compared to the free spectral range (FSR) of etalons. Two capabilities enabled the higher-precision determination of isotope abundances of atomic beams: (1) reduction of low-frequency additive noise, especially the noise caused by black-body radiation and (2) suppression of non-absorption transmission losses. The performance of this system was validated with uranium samples of various isotopic compositions. By comparing the measurements using natural uranium samples between the direct absorption and the wavelength modulation approaches, a 21-fold decrease in uncertainty of the integrated absorbance and a 6.8-fold improvement in the 1-σ precision of the number density were achieved. In addition, by comparing the results using uranium oxide samples, a 6.1-fold decrease in the uncertainty of inferred isotope abundance was obtained. These results demonstrate that the 1f-normalized 2f wavelength modulation spectroscopy (WMS-2f/1f) technique enables higher-precision analysis of atomic beams.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"229 ","pages":"Article 107202"},"PeriodicalIF":3.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783915","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

下一页尾页

类型

全部化学•材料生命科学医学物理工程技术环境•农林材料科学地球科学法学管理学化学环境科学与生态学计算机科学教育学经济学农林科学人文科学生物学数学物理与天体物理心理学综合性期刊其他工业工程理学历史学农学文学信息工程

数据库

全部 ACS Publications Elsevier ieeexplore Springer The Royal Society of Chemistry Wiley

期刊

Spectrochimica Acta Part B: Atomic Spectroscopy

全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.

﹀