Spectrochimica Acta Part B: Atomic Spectroscopy最新文献_第2页

In situ hydride generation for multielement analysis in complex matrices through ICP-MS with a high-temperature sample introduction system 高温进样系统ICP-MS原位氢化物生成技术用于复杂基质中多元素分析

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-12-24 DOI: 10.1016/j.sab.2025.107351

Rebeca Pérez-Ramírez, Raquel Sánchez-Romero, José Luis Todolí-Torró

Hydride generation (HG) remains a powerful sample introduction strategy for the determination of some elements by inductively coupled plasma mass spectrometry (ICP-MS). In this study, two HG-based configurations were systematically evaluated, including a conventional HG system with external gas-liquid separation and a structurally modified high-temperature torch-integrated sample introduction system (hTISIS). The hTISIS was equipped with an auxiliary inlet, i.e., drain tube, for the introduction of NaBH₄ and HCl, allowing gas-liquid reaction and phase separation to occur directly within the thermostated spray chamber. This latter setup, HG-hTISIS, was employed under three different modes: sample introduction through both the nebulizer and the drain tube (mode 1); sample introduction only through nebulization (mode 2); and sample introduction only through the drain tube (mode 3). In all three instances, hydride-forming reagents were continuously delivered by means of the drain tube.

The operability of all configurations was assessed for five hydride-forming elements (As, Se, Sb, Sn, Bi), while quantitative performance was ultimately established using the optimized in situ HG-hTISIS configuration operated at 200 °C. Non-hydride-forming elements including Li, Al, Mn, Ti, Co, V, Cr, Ni, Cu, Zn, Rb, Sr, Ag, Ba, Cd, Tl, and Pb were also determined under this configuration, with an efficient aerosol transport enabled by the thermal chamber. A Box-Behnken design was employed to optimize the concentrations of NaOH, NaBH₄, and HCl, ensuring robust hydride formation and minimal matrix effects across a wide range of conditions.

Analytical performance was evaluated in terms of sensitivity, precision, and limits of detection (LODs). Signal enhancement factors ranging from 13 to 150 were achieved for hydride-forming elements, with sub-μg L⁻¹ detection limits and a sample uptake of only 30 μL min⁻¹, in contrast to 0.5 mL min⁻¹ in the conventional HG system. Moreover, foam formation was significantly mitigated in biological matrices, allowing direct analysis after sample dilution. Accuracy was confirmed through the analysis of certified reference materials of environmental and clinical origin, showing good agreement with the certified values. These results highlighted the analytical potential of the hydride generation HG-hTISIS configuration as a sensitive, low-consumption, and multielement-compatible alternative for the analysis of complex matrices by ICP-MS.

在电感耦合等离子体质谱（ICP-MS）测定某些元素时，氢化物生成（HG）仍然是一种强有力的进样策略。在这项研究中，系统地评估了两种基于HG的配置，包括具有外部气液分离的传统HG系统和结构改进的高温火炬集成样品导入系统（hTISIS）。hTISIS配有辅助入口，即放水管，用于引入NaBH4和HCl，使气液反应和相分离直接在恒温喷雾室内进行。后一种装置HG-hTISIS在三种不同的模式下使用：通过雾化器和引流管引入样品（模式1）；样品只通过雾化引入（模式2）；而样品导入只能通过引流管（模式3）。在所有三种情况下，氢化物形成试剂都是通过引流管连续输送的。对5种氢化物形成元素（As, Se, Sb, Sn, Bi）进行了所有构型的可操作性评估，并最终使用优化的原位HG-hTISIS构型在200°C下建立了定量性能。非氢化物形成元素包括Li， Al, Mn, Ti, Co， V, Cr, Ni, Cu, Zn, Rb, Sr, Ag, Ba, Cd， Tl和Pb也在这种配置下进行了测定，通过热室实现了有效的气溶胶输送。采用Box-Behnken设计来优化NaOH、NaBH4和HCl的浓度，确保在广泛的条件下氢化物形成和最小的基质效应。根据灵敏度、精密度和检出限（lod）对分析性能进行评价。形成氢化物的信号增强因子为13 ~ 150，检测限为亚μL - 1，样品吸收量仅为30 μL min - 1，而传统HG系统的吸收量为0.5 mL min - 1。此外，泡沫形成在生物基质显著减轻，允许样品稀释后直接分析。通过对环境和临床来源的认证标准物质进行分析，证实了准确性，与认证值吻合良好。这些结果突出了氢化物生成HG-hTISIS配置的分析潜力，作为ICP-MS分析复杂基质的敏感，低消耗和多元素兼容的替代方案。

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引用次数: 0

Comparison of atomized mass and crater volume in laser ablation 激光烧蚀中雾化质量与弹坑体积的比较

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-12-24 DOI: 10.1016/j.sab.2025.107396

Jonathan Merten , Mary Foster , Shealyn Chestnut , Kyle C. Hartig

The extent and dynamics of laser ablation are typically studied using crater imaging or by invoking the relationship between atomic emission and the mass removed. The former is a static view of a dynamic process and requires the accumulation of multiple shots in one location. The latter is complex and not absolute without calibration of the optical system with a standard of spectral radiance. We measure the mass of the atomized plume by laser atomic-absorption spectroscopy at 2 μs without external mass calibration; mass uncertainty in laser-ablation atomic absorption spectroscopy (LA-AAS) results from uncertainties in line-area fitting, tabulated oscillator strengths, and partition functions as well as a < 10 % underrepresentation of the mass due to treating the plasma as a single thermodynamic equilibrium. The LA-AAS-measured mass reflects the atoms in the probed charge states and does not include condensed matter or molecular species. The ablation efficiency under 300 mbar of helium varies significantly between the two focusing conditions used. A comparison of crater-derived masses and LA-AAS masses suggests that more defocused ablation may result in significant redeposition of material in the crater, distorting the conclusions from drilling studies and crater imaging. More focused ablation conditions result in crater-derived masses that exceed those measured with LA-AAS and suggest melt expulsion or phase explosion.

激光烧蚀的范围和动力学通常是通过火山口成像或通过调用原子发射与被去除的质量之间的关系来研究的。前者是动态过程的静态视图，需要在一个位置积累多个镜头。后者是复杂的，不绝对的校准光学系统与光谱辐射的标准。在没有外部质量定标的情况下，用激光原子吸收光谱法在2 μs下测量了雾化羽流的质量；激光烧蚀原子吸收光谱（LA-AAS）的质量不确定性来自线面积拟合、表列振荡器强度和配分函数的不确定性，以及由于将等离子体视为单一热力学平衡而导致的10%的质量代表性不足。la - aas测量的质量反映了原子在探测电荷状态，不包括凝聚态物质或分子种类。在300毫巴氦气下，两种聚焦条件下的烧蚀效率差异显著。对陨石坑产生的质量和LA-AAS质量的比较表明，更多的散焦烧蚀可能导致陨石坑中物质的显著再沉积，从而扭曲了钻探研究和陨石坑成像的结论。更集中的烧蚀条件导致陨石坑产生的质量超过LA-AAS测量的质量，表明熔体排出或相爆炸。

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引用次数: 0

Comparison of scandium-based post-plasma chemical ionization approaches for elemental fluorine detection by nitrogen microwave-sustained inductively-coupled atmospheric-pressure plasma 氮微波持续电感耦合大气压等离子体检测元素氟的钪基等离子体后化学电离方法比较

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-12-24 DOI: 10.1016/j.sab.2025.107311

Jordan L. Tanen, Kaveh Jorabchi

Fluorine detection has been a challenge in elemental mass spectrometry because of inefficient ion generation. Polyatomic analytical ion formation has emerged as a promising strategy to address this limitation. Here, we compare several post-plasma ion-neutral reactions that leverage affinity between scandium and F atoms to form analytical ions. A nitrogen microwave-sustained inductively-coupled atmospheric-pressure plasma (MICAP) is utilized to decompose fluorochemicals. The plasma products are sampled into an interface designed to minimize their adsorption to the surfaces, and are ionized in two main ways: 1) by scandium-containing ions generated using nano-electrospray ionization (nESI); 2) by addition of scandium to the plasma coupled with a post-MICAP corona discharge. Both avenues are also evaluated in positive- and negative-ion modes, producing ions such as ScFNO₃(H₂O)_n⁺ and ScF(NO₃)₃⁻. In positive-ion mode, both approaches show similar fundamental characteristics, suggesting HF ionization as the main signal generation pathway. However, in negative-ion mode, nESI shows significantly lower ionization efficiency compared to that of the post-plasma corona discharge approach. The better ionization efficiency by negative-mode corona discharge ionization is attributed to production of more effective reagent ions for HF ionization, and possibility of ionizing Sc- and F-containing neutral plasma products. Importantly, the isobaric interferences are significantly decreased in negative-ion mode, improving analytical performance. Further, negative-mode ionization offers better tolerance to sodium matrix compared to that of positive-mode ionization, attributed to decreased clustering tendencies of negative ions with plasma-produced NaNO₃ upon sodium introduction. These studies provide critical insights to further improve post-plasma chemical ionization for F detection.

由于离子产生效率低，氟检测在元素质谱法中一直是一个挑战。多原子分析离子形成已成为解决这一限制的一种有前途的策略。在这里，我们比较了几种后等离子体离子中性反应，利用钪和F原子之间的亲和力形成分析离子。利用氮微波持续电感耦合大气压等离子体（MICAP）分解含氟化学品。等离子体产品被采样到一个界面中，以尽量减少其对表面的吸附，并通过两种主要方式电离：1)由纳米电喷雾电离（nESI）产生的含钪离子；2)在等离子体中加入钪，再加上micap后的电晕放电。这两种途径也在正离子和负离子模式下进行了评估，产生的离子如ScFNO3(H2O)n+和ScF(NO3)3−。在正离子模式下，这两种方法显示出相似的基本特征，表明HF电离是主要的信号产生途径。然而，在负离子模式下，nESI的电离效率明显低于等离子体后电晕放电方法。负模式电晕放电电离效率高的原因是产生了更有效的HF电离试剂离子，并且有可能电离含Sc和f的中性等离子体产物。重要的是，在负离子模式下等压干扰显著减少，提高了分析性能。此外，与正模式电离相比，负模式电离对钠基质的耐受性更好，这是由于钠引入后等离子体产生的NaNO3的负离子聚集倾向降低。这些研究为进一步改进F检测的等离子体后化学电离提供了重要的见解。

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引用次数: 0

From pitfalls to progress in quantitative single-cell elemental analysis by time-of-flight ICP-mass spectrometry 从飞行时间icp -质谱定量单细胞元素分析的缺陷到进展

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-12-24 DOI: 10.1016/j.sab.2025.107384

Rinus Dejonghe , Ana Lores-Padin , Eduardo Bolea-Fernandez , Thibaut Van Acker , Olivier De Wever , Frank Vanhaecke

The aim of this study was to evaluate the capabilities and limitations of single-cell elemental analysis of tandem and time-of-flight ICP-mass spectrometry (SC-ICP-MS/MS and SC-ICP-ToF-MS). As partial detection of elemental distributions remains underexplored in the context of single-cell analysis, event detection, data completeness, and the reliability of derived quantitative results were investigated. The effects of detection thresholds, instrumentation type, and transient signal characteristics on the integrity of single-cell datasets and their interpretation were addressed. Red blood cells (RBCs) and peripheral blood mononuclear cells (PBMCs) were isolated, fixed with glutaraldehyde, and analyzed using both ICP-MS/MS and ICP-ToF-MS, while average contents (fg per cell) were additionally determined by bulk analysis. One key finding was that although ICP-MS/MS offers higher sensitivity, it is incompatible with multi-elemental profiling, while the sequential data acquisition for different target elements leads to inconsistent cell counts (observed cell events) during consecutive runs. In contrast, ICP-ToF-MS provides (quasi-)simultaneous detection, allowing comprehensive and consistent characterization when using an endogenous (e.g., Fe in RBCs) or exogenous (e.g., Ir from a DNA intercalator in PBMCs) cell marker. The use of such a cell marker reveals how many cells remain undetected for each element under real experimental conditions. Second, by varying signal thresholds during data processing, the influence on (partially) detected mass distributions and the impact on mean signal intensities were evaluated. This confirmed that when detection thresholds exclude low-intensity events, the resulting distributions are biased. This study underscores the need for improved instrumental sensitivity for biologically relevant low-mass elements, especially for ToF-based ICP-mass spectrometers, as well as for careful interpretation of (partially) detected datasets to avoid misleading conclusions.

本研究的目的是评估串联和飞行时间icp -质谱（SC-ICP-MS/MS和SC-ICP-ToF-MS）单细胞元素分析的能力和局限性。由于在单细胞分析的背景下，元素分布的部分检测仍未得到充分的探索，因此对事件检测、数据完整性和衍生定量结果的可靠性进行了研究。讨论了检测阈值、仪器类型和瞬态信号特征对单细胞数据集完整性及其解释的影响。分离红细胞（rbc）和外周血单个核细胞（PBMCs），用戊二醛固定，采用ICP-MS/MS和ICP-ToF-MS进行分析，同时采用批量分析法测定平均含量（每个细胞fg）。一个关键的发现是，尽管ICP-MS/MS提供了更高的灵敏度，但它与多元素分析不兼容，而对不同目标元素的顺序数据采集导致连续运行期间细胞计数（观察到的细胞事件）不一致。相比之下，ICP-ToF-MS提供（准）同步检测，允许在使用内源性（例如红细胞中的铁）或外源性（例如PBMCs中DNA插入物中的Ir）细胞标记物时进行全面和一致的表征。这种细胞标记的使用揭示了在实际实验条件下，每种元素有多少细胞未被检测到。其次，通过在数据处理过程中改变信号阈值，对（部分）检测到的质量分布的影响和对平均信号强度的影响进行了评估。这证实，当检测阈值排除低强度事件时，结果分布是有偏差的。这项研究强调需要提高仪器对生物相关的低质量元素的灵敏度，特别是对基于tof的icp -质谱仪，以及对（部分）检测到的数据集进行仔细解释，以避免误导性结论。

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引用次数: 0

A tribute to John Olesik 这是对John Olesik的致敬

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-12-24 DOI: 10.1016/j.sab.2025.107424

Paul B. Farnsworth

引用次数: 0

Utilization of the LS-APGD microplasma/orbitrap-FTMS booster system for detection and isotopic analysis of neodymium nanoparticles LS-APGD微等离子体/轨道阱- ftms助推器系统在钕纳米粒子检测和同位素分析中的应用

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-12-24 DOI: 10.1016/j.sab.2025.107398

Suraj Shrestha , Joseph V. Goodwin , Hunter B. Andrews , Benjamin T. Manard , R. Kenneth Marcus

Detection and isotopic analysis of particle populations has seen rapid growth across several application areas, including environmental analysis, nuclear forensics, and food safety. The ability to characterize the particles' unique elemental and isotopic fingerprints could provide information related to formation, processing history, and transport. Regarding nuclear forensics, isotopic analysis of particles derived from diverse materials is often used as a tool to trace the origin and processing history. Mass spectrometric-based techniques currently used for particle population analysis often suffer from limited mass resolution, particularly when dealing with real-world samples that are affected by isobaric and polyatomic interferences from the matrix. To address these analytical challenges, we propose a novel method utilizing the liquid sampling-atmospheric pressure glow discharge (LS-APGD) microplasma ionization source coupled to an ultrahigh resolution Orbitrap mass spectrometer, further enhanced with the FTMS X2T Booster data acquisition and processing unit. The FTMS Booster enables acquisition of extended transient times of up to 3 s, significantly improving mass resolution, thereby reducing or even eliminating the need for prior separation of isobaric or polyatomic interferences. Additionally, the detection of low-abundance isotopes was improved by increasing the signal-to-noise (S/N) ratio. As proof of concept, this study demonstrates the feasibility of the LS-APGD/Orbitrap-FTMS X2T Booster platform for direct analysis using a suspension of well-characterized ∼120 nm neodymium particles. The quality of the isotope ratios values obtained from a few hundred particles were in good agreement with those obtained from homogeneous ionic solutions. These results highlight the potential of the LS-APGD/Orbitrap platform for rapid, accurate, and interference-resilient isotope ratio analysis of particle populations without the need for dissolution and subsequent chemical separations, offering significant advantages for nuclear forensics, safeguards, and environmental applications. The effort here also points to further paths forward, hopefully towards single particle (SP) analysis using microplasma ionization and the ultrahigh resolving power of the Orbitrap mass analyzer.

粒子群的检测和同位素分析在环境分析、核取证和食品安全等多个应用领域得到了快速发展。表征颗粒独特的元素和同位素指纹的能力可以提供与形成、加工历史和运输有关的信息。在核取证方面，对来自不同材料的颗粒进行同位素分析经常被用作追踪起源和加工历史的工具。目前用于粒子居数分析的基于质谱的技术经常受到有限的质量分辨率的影响，特别是在处理受等压和多原子干扰的真实样品时。为了解决这些分析挑战，我们提出了一种新的方法，利用液体采样-大气压辉光放电（LS-APGD）微等离子体电离源耦合到超高分辨率Orbitrap质谱仪，并进一步增强FTMS X2T Booster数据采集和处理单元。FTMS助推器可以获得长达3秒的瞬态时间，显著提高质量分辨率，从而减少甚至消除了事先分离等压或多原子干扰的需要。此外，通过提高信噪比（S/N），提高了对低丰度同位素的检测。作为概念验证，本研究证明了LS-APGD/Orbitrap-FTMS X2T Booster平台使用表征良好的~ 120 nm钕颗粒悬浮液进行直接分析的可行性。从几百个粒子中得到的同位素比值值与从均匀离子溶液中得到的同位素比值值的质量很好地一致。这些结果突出了LS-APGD/Orbitrap平台在不需要溶解和随后的化学分离的情况下对颗粒种群进行快速，准确和抗干扰的同位素比分析的潜力，为核取证，保障和环境应用提供了显着优势。这里的努力也指出了进一步的发展方向，希望能够利用微等离子体电离和Orbitrap质量分析仪的超高分辨率进行单粒子（SP）分析。

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引用次数: 0

Tribute to John W. Olesik 向John W. Olesik致敬

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-12-24 DOI: 10.1016/j.sab.2025.107422

Gary M. Hieftje

引用次数: 0

Improved Thomson scattering plasma diagnostics via rotational Raman scattering field corrections 通过旋转拉曼散射场校正改进汤姆逊散射等离子体诊断

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-12-24 DOI: 10.1016/j.sab.2025.107313

Kevin Finch, Ezekiel Branch, Jennifer Agu, Aryanna Monroe, Harsshit Agrawaal, Gerardo Gamez

Laser scattering spectroscopy plasma diagnostics are the methods of choice, when available, to guide improvements in plasma analytical atomic spectrometry performance through rational design. Nevertheless, Thomson scattering diagnostics of low-density plasmas have strict experimental conditions frequently met with in-house built imaging spectrographs that require flat-field correction to account for instrument imperfections; however, traditional flat-fielding techniques are limited in several aspects, particularly with respect to Thomson scattering experimental conditions. Here, we describe a new field-correction method based on diatomic molecule rotational Raman scattering measurements and simulations, thus taking advantage of the similar spectral characteristics and instrumentation requirements shared by both scattering techniques. A rotational Raman spectra simulation algorithm was developed and implemented for N₂, O₂, and their mixtures at different temperatures. The field correction is achieved by comparing simulated rotational Raman scattering spectra to those measured from N₂ at room temperature and atmospheric pressure. Finally, the field correction is applied to Thomson scattering spectral images measured from a glow discharge under typical analytical atomic optical emission spectrometry operating conditions. A significant improvement is gained in the accuracy and precision of the electron temperature and electron number density derived from the Thomson scattering spectra after rotational Raman scattering field correction, as shown by the enhanced goodness-of-fit and standard deviation in the respective function fitting protocols implemented to extract the electron fundamental parameters of interest.

激光散射光谱等离子体诊断是选择的方法，当可用时，指导改进等离子体分析原子光谱性能通过合理的设计。然而，低密度等离子体的汤姆逊散射诊断有严格的实验条件，经常需要内部建造的成像光谱仪，需要平场校正来解释仪器的缺陷；然而，传统的平场技术在几个方面受到限制，特别是在汤姆逊散射实验条件方面。在这里，我们描述了一种新的基于双原子分子旋转拉曼散射测量和模拟的场校正方法，从而利用了两种散射技术相似的光谱特性和仪器要求。提出并实现了不同温度下N2、O2及其混合物的旋转拉曼光谱模拟算法。通过将模拟的旋转拉曼散射光谱与室温和常压下N2测量的拉曼散射光谱进行比较，实现了场校正。最后，在典型的原子发射光谱分析操作条件下，对辉光放电的汤姆逊散射光谱图像进行了场校正。旋转拉曼散射场校正后，从汤姆逊散射光谱得到的电子温度和电子数密度的准确度和精密度得到了显著提高，这可以从用于提取感兴趣的电子基本参数的函数拟合方案的拟合优度和标准偏差得到增强。

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引用次数: 0

A machine learning-based strategy to determine inductively coupled plasma robustness from non-analyte signals 基于机器学习的从非分析物信号中确定电感耦合等离子体鲁棒性的策略

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-12-24 DOI: 10.1016/j.sab.2025.107310

Jake A. Carter , Charles A. Barber , Todor I. Todorov , Patrick J. Gray

The inductively coupled plasma (ICP) is a key energy source for efficient atomization, excitation, and ionization in atomic spectrometry. Plasma robustness, often represented as the Mg II/I line intensity ratio, is a well-known and commonly used diagnostic probe of energy transfer in the ICP. Typical ICP parameters are set to maximize plasma robustness with relatively large injection tube diameters, decreased nebulizer (i.e., carrier gas) flow rates, and increased radiofrequency powers. ICP optical emission spectrometry is more resistant to matrix effects at higher values of Mg II/I.

We describe a strategy featuring machine learning to determine plasma robustness from non-analyte, plasma-based species of Ar, H, and O. We collected a representative dataset (n = 4450) of plasma robustness and non-analyte signals at varying instrumental conditions and plasma environments. Tuned tree-based ensemble and neural network models yielded accurate predictions of Mg II/I robustness with root mean squared errors as low as 0.36 across the training and testing data. The trained models may be used to predict plasma robustness, given model imperfections for predictions in relatively extreme matrices. Once trained, the models do not require any physical modification to commercial instrumentation nor the addition of diagnostic elements to the plasma. This machine learning strategy with plasma-based species can be adapted to train predictive models for additional plasma characteristics.

电感耦合等离子体（ICP）是原子光谱中实现高效原子化、激发和电离的关键能量源。血浆鲁棒性，通常表示为Mg II/I线强度比，是ICP中众所周知且常用的能量转移诊断探头。典型的ICP参数设置，以最大限度地提高等离子体鲁棒性，相对较大的注射管直径，减少雾化器（即载气）流速，并增加射频功率。在较高的Mg /I值下，ICP光学发射光谱法对基体效应的抵抗能力更强。我们描述了一种以机器学习为特征的策略，以确定非分析物、基于等离子体的Ar、H和o物质的等离子体鲁棒性。我们收集了不同仪器条件和等离子体环境下等离子体鲁棒性和非分析物信号的代表性数据集（n = 4450）。经过调整的基于树的集成和神经网络模型对训练和测试数据的Mg II/I稳健性进行了准确的预测，均方根误差低至0.36。经过训练的模型可用于预测等离子体的鲁棒性，因为在相对极端的矩阵中预测模型存在缺陷。一旦经过训练，这些模型不需要对商业仪器进行任何物理修改，也不需要向等离子体添加诊断元素。这种基于等离子体的机器学习策略可以用于训练预测模型，以获得更多的等离子体特征。

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引用次数: 0

Absorptive influence on interpretation of spatially resolved emission from apparently cylindrically symmetrical plasmas: A modeling approach 吸收对明显圆柱对称等离子体空间分辨发射解释的影响：一种建模方法

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2025-12-24 DOI: 10.1016/j.sab.2025.107392

Alexander Scheeline

Spatial dissection of cylindrically symmetrical emitting plasmas using the Abel inversion is revisited. Effects of absorption, line shape, and continuum using classical formulations and formulae explicitly accounting for optical density are illustrated. Even with compensation for absorption, wavelength resolution must be narrower than spectral linewidth to obtain accurate profiles. The demands of adequate signal-to-noise ratio make such measurements on single discharges impossible, while signal averaging requires that all averaged discharges be positioned within a few micrometers spatially and stable within a few parts per thousand in intensity throughout the line profile. Even with understanding of the role of optical thickness, some spatial patterns well-known in the literature remain challenging to model.

利用阿贝尔反演重新研究了圆柱对称发射等离子体的空间解剖。利用经典公式和公式明确说明光密度的吸收，线形和连续体的影响。即使对吸收进行了补偿，波长分辨率也必须小于谱线宽度，才能获得准确的轮廓。对足够的信噪比的要求使得单次放电的测量不可能实现，而信号平均要求所有平均放电在空间上定位在几微米内，并且在整个线路剖面上的强度稳定在千分之几。即使理解了光学厚度的作用，文献中已知的一些空间模式仍然具有挑战性。

引用次数: 0