Spectrochimica Acta Part B: Atomic Spectroscopy最新文献_第3页

Transferable calibration coefficients for semi-quantitative analysis by Laser Induced Breakdown Spectroscopy (LIBS) in samples containing calcium 含钙样品中激光诱导击穿光谱（LIBS）半定量分析的可转移校准系数

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2026-03-01 Epub Date: 2026-01-13 DOI: 10.1016/j.sab.2026.107454

V. Lazic , M. Markovic , B.D. Stankov , F. Andreoli , C. Ulrich , M. Kuzmanovic

This work establishes a framework for testing and developing calibration coefficients for multi-elemental analysis by LIBS, that are transferrable to various instruments under specific experimental conditions: measurements in air, full optical collection of the plasma plume, apparent plasma temperature and electron density within 6500–7500 K and 1–2 × 10¹⁷ cm⁻³, respectively. Here, the plasma was produced by ns laser pulses at 1064 nm, with energy of 30 mJ while for its detection we used high resolution compact spectrometers. Calibration coefficients for 14 elements were derived respect to one Ca I line (443.50 nm) considering that Ca is a common element in natural samples. The calibration coefficients were obtained from: (i) extrapolated linear peak growths, produced by changing the sample mass on a solid support (Si wafer or Al); (ii) peaks normalized on the Ca line. Their validity interval is specified while the inherent variations with the element abundance and plasma parameters are explained. The initial calibration involved nine different samples, including a multi-element standard, rock, soils ash, coal, and carbonate's mixture, while the validation was applied on two soil samples, both in form of particles on wafer and pressed into pellets. Calibration coefficients based on the linear slope produced quantification of 13 elements within accuracy of ±30% while the use of the line ratios increased the error for some considered elements. To facilitate transfer of the coefficients to other experiments, we provide practical instructions and limits of applicability. The transition from relative to absolute element concentration measurements is also explained in the text.

本工作建立了一个测试和开发LIBS多元素分析校准系数的框架，该框架可在特定实验条件下转移到各种仪器上：空气测量，等离子体羽流的全光学采集，等离子体表观温度和电子密度分别在6500-7500 K和1-2 × 1017 cm−3范围内。在这里，等离子体是在1064 nm的激光脉冲中产生的，能量为30 mJ，我们使用高分辨率紧凑光谱仪进行检测。考虑到Ca是天然样品中常见的元素，推导了14种元素的校准系数，相对于一条Ca I线（443.50 nm）。校准系数来自：(i)外推线性峰值生长，通过改变固体载体（硅片或铝）上的样品质量产生；（ii）在Ca线上归一化的峰。指出了它们的有效区间，并解释了它们随元素丰度和等离子体参数的固有变化。最初的校准涉及9个不同的样品，包括多元素标准，岩石，土壤灰，煤和碳酸盐混合物，而验证应用于两种土壤样品，既以颗粒的形式在薄片上，也以压成颗粒的形式。基于线性斜率的校正系数对13个元素的定量精度在±30%以内，而线比的使用增加了某些考虑元素的误差。为了便于将系数转移到其他实验中，我们提供了实用的说明和适用性限制。本文还解释了从相对元素浓度测量到绝对元素浓度测量的转变。

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引用次数: 0

Evaluating analytical methods for ancient glass: Validation of micro-XRF quantitative data through comparison with LA-ICP-MS 评价古玻璃的分析方法：通过与LA-ICP-MS的比较验证微xrf定量数据

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2026-03-01 Epub Date: 2026-01-06 DOI: 10.1016/j.sab.2025.107449

Sabrina Molinaro , Roberta Zanini , Kalliopi Tsampa , Elti Cattaruzza , Andreas G. Karydas , Arianna Traviglia

This study aims to assess the reliability of micro-X-ray fluorescence spectroscopy (μ-XRF) as a quantitative, non-invasive tool for the in-situ compositional analysis of ancient glass. μ-XRF is widely employed in archaeological and materials science contexts due to its ability to rapidly detect major, minor, and trace elements without the need for sampling. However, it is often assumed that its limited sensitivity to light elements (Z < 13) in field applications poses challenges for a comprehensive characterisation of glass-making technologies and raw materials. In this study, we evaluate the analytical performance of μ-XRF for glass analysis, going beyond compositional characterisation by systematically comparing it with Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). LA-ICP-MS offers superior detection limits and a broader elemental range, but its use is constrained by the need for sample preparation and its non-portable nature. The precision of μ-XRF was assessed through repeated daily measurements, while accuracy was evaluated using the certified reference glasses Corning A and B. Correction trends were developed by comparing μ-XRF results with both the nominal concentrations of these standards and with corresponding LA-ICP-MS data, in order to mitigate inherent limitations and enhance the method's reliability. The validated protocol was then applied to a set of Roman glass samples of unknown composition. The results confirm that, despite its limitations, μ-XRF can deliver accurate and reproducible data, supporting its use as a rapid and versatile method for in-situ compositional analysis of ancient glass.

本研究旨在评估微x射线荧光光谱（μ-XRF）作为一种定量、无创的古玻璃原位成分分析工具的可靠性。μ-XRF广泛应用于考古和材料科学领域，因为它能够快速检测主要、次要和痕量元素，而无需采样。然而，人们通常认为，在现场应用中，它对轻元素（Z < 13）的灵敏度有限，这对玻璃制造技术和原材料的全面表征构成了挑战。在这项研究中，我们评估μ-XRF在玻璃分析中的分析性能，通过系统地将其与激光烧蚀电感耦合等离子体质谱（LA-ICP-MS）进行比较，从而超越了成分表征。LA-ICP-MS提供了更好的检测限和更广泛的元素范围，但其使用受到样品制备的需要和其不可携带性的限制。μ-XRF通过每日重复测量来评估精密度，而准确度则使用经认证的标准玻璃康宁A和b来评估。通过将μ-XRF结果与这些标准品的标称浓度和相应的LA-ICP-MS数据进行比较，得出修正趋势，以减轻固有的局限性，提高方法的可靠性。然后将验证的协议应用于一组未知成分的罗马玻璃样品。结果证实，尽管有其局限性，μ-XRF可以提供准确和可重复的数据，支持其作为一种快速和通用的方法用于古代玻璃的原位成分分析。

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引用次数: 0

Laser-induced breakdown spectroscopy for the characterization of certified reference materials containing rare earth elements 激光诱导击穿光谱法表征含有稀土元素的标准物质

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2026-03-01 Epub Date: 2025-12-03 DOI: 10.1016/j.sab.2025.107420

Daniel Diaz , Amir Fayyaz , Muhammad Aslam Baig , Tyler Wilson , David W. Hahn

Laser-induced breakdown spectroscopy (LIBS) was used to characterize non-matrix matched certified reference materials containing the rare earth elements La, Nd, Pr, and the actinide metal Th. LIBS characterization included the creation of calibration curves, calculation of limits of detection and quantification, sample classification by matrix type, and evaluation of the sample homogeneity using LIBS chemical maps. Eleven commercial certified reference materials from four different matrices were prepared as pressed pellets and analyzed with LIBS. A single univariate calibration curve for each analyte that included samples from all four matrices was obtained, demonstrating the possibility of non-matrix matched chemical analysis and the strong dependence of LIBS performance with the pellet quality. The limits of detection and quantification were below the nominal earth's crustal abundance of the analytes. Sample clustering and classification by matrix type was possible by applying principal component analysis to the combined spectral data from six 26-nm-width spectral windows. Finally, 2D LIBS chemical mapping was carried out to assess the spatial surface distribution of the analytes on the pellets.

采用激光诱导击穿光谱（LIBS）对含有稀土元素La、Nd、Pr和锕系金属Th的非基体匹配标准物质进行了表征。LIBS表征包括校准曲线的建立、检出限和定量限的计算、根据矩阵类型对样品进行分类以及使用LIBS化学图对样品进行均匀性评价。从四种不同的基质中制备了11种经商业认证的标准物质作为压球，并用LIBS进行分析。获得了包含所有四种基质样品的每种分析物的单一单变量校准曲线，证明了非基质匹配化学分析的可能性以及LIBS性能与颗粒质量的强烈依赖性。检测和定量限低于被分析物的名义地壳丰度。利用主成分分析方法对6个26 nm宽光谱窗的组合光谱数据进行聚类和矩阵分类。最后，进行了二维LIBS化学作图，以评估分析物在球团上的空间表面分布。

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引用次数: 0

Fast-sequential determination of As, Bi, Cd, Ge, Hg, Sb and Sn by CVG-MIP OES using a multimode sample introduction system 多模样品导入系统CVG-MIP OES快速序列测定As、Bi、Cd、Ge、Hg、Sb和Sn

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2026-03-01 Epub Date: 2025-12-24 DOI: 10.1016/j.sab.2025.107446

Letícia C. Brudi, Eliana T.F. Larruscain, Andressa D.W.V. Martinez, Gustavo R. Bitencourt, Paola A. Mello, Fabio A. Duarte

The purpose of this study was to develop a method coupling chemical vapor generation (CVG) and microwave-induced plasma optical emission spectrometry (MIP OES) for the determination of As, Bi, Cd, Ge, Hg, Sb and Sn in environmental matrices, such as coal, marine, and lake sediment. The main parameters for the development of CVG-MIP OES method were the concentration of NaBH₄ (0.1 to 2 % m/v) and HCl (1 to 7 mol L⁻¹) solutions, the type (thiourea, L-cysteine, potassium iodide and hydroxylamine hydrochloride) and concentration (0.1 to 2 % m/v) of pre-reducing agents solutions, the operational conditions for MIP OES instrument, the interferences caused by transition metals (in the range of 25 to 1000 μg L⁻¹), and the concentration of HNO₃ (5 to 40 %) in the samples. The proposed method allows for achieving limit of detection (LOD) values of 199, 45.4, 112, 75.8, 89.7, 61.9, and 79.4 ng g⁻¹ for As, Bi, Cd, Ge, Hg, Sb, and Sn, respectively. The accuracy was evaluated by the analysis of three certified reference materials: coal (NIST 1632c), marine sediment (PACS-2) and lake sediment (SUD-1), with agreement ranging from 92 to 111 %. Thus, the CVG-MIP OES method proved to be effective for As, Bi, Cd, Ge, Hg, Sb, and Sn determination in samples with different compositions, being robust regarding HNO₃ concentration and interfering metals concentration. A significant reduction in the LOD of the MIP OES technique was obtained. Finally, the proposed method is a cost-effective alternative to the traditional plasma-based techniques, due to its low long-term cost and good robustness.

本研究的目的是建立一种耦合化学蒸汽产生（CVG）和微波诱导等离子体光学发射光谱（MIP OES）的方法，用于测定煤、海洋和湖泊沉积物等环境基质中的As、Bi、Cd、Ge、Hg、Sb和Sn。CVG-MIP OES的发展方法的主要参数是NaBH4的浓度(m / v 0.1 - 2%)和盐酸(1 - 7摩尔L−1)解决方案,类型(硫脲,半胱氨酸,碘化钾和盐酸羟胺)和浓度(0.1米/ v) 2%的pre-reducing代理解决方案,MIP海洋能仪器,操作条件造成的干扰过渡金属(在25到1000μg L−1),和硝酸的浓度(5 - 40%)的样品。该方法对As、Bi、Cd、Ge、Hg、Sb和Sn的检测限（LOD）分别为199、45.4、112、75.8、89.7、61.9和79.4 ng g−1。准确度通过分析三种认证标准物质进行评估：煤（NIST 1632c），海洋沉积物（PACS-2）和湖泊沉积物（SUD-1），一致性范围为92%至111%。因此，CVG-MIP OES法对不同成分样品的As、Bi、Cd、Ge、Hg、Sb、Sn的测定是有效的，对HNO3浓度和干扰金属浓度的测定是稳健的。MIP OES技术的LOD显著降低。最后，该方法长期成本低，鲁棒性好，是传统等离子体技术的一种经济有效的替代方法。

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引用次数: 0

Quantitative optical emission spectroscopy monitoring of Erosion product in hall thruster channels based on composite line Actinometry 基于复合线光谱学的霍尔推力器通道侵蚀产物定量发射光谱监测

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2026-03-01 Epub Date: 2026-01-15 DOI: 10.1016/j.sab.2026.107456

Bo-Wen Zheng , Xi-Ming Zhu , Wei Xi , Lu Wang , Da-Ren Yu

Optical emission spectroscopy (OES) method has been widely employed for monitoring ceramic channel erosion products in Hall thrusters. Analysis of OES results relies on actinometry, which requires spectral lines with similar excitation energies. However, the absence of Xe I lines matching the excitation energy of the B I lines of erosion products in Hall thrusters imposes significant limitations on traditional actinometry. To address this, this work proposes a composite line actinometry method. By constructing ratios from multiple spectral lines, the method effectively decouples the relative density of boron erosion product from the electron temperature, which is a major source of uncertainty. By investigating a 100 W Hall thruster, the composite line ratio is constructed using Xe I lines at 881.94 nm and 992.32 nm, along with B I line at 249.77 nm. Results demonstrate that when the electron temperature ranges between 5 and 15 eV, the boron atoms' relative density derived from the measurements remains unaffected by electron temperature and is exclusively determined by the composite line ratio. Compared to traditional actinometry, the composite line actinometry reduces quantification deviations in erosion characteristics by 10–38% under varying acceleration voltages and by 4–25% under varying mass flow rates. This work establishes a robust OES-based framework for the relative measurement of erosion rate at different operation conditions, building a direct correlation between spectral signals and erosion characteristics, enhancing the capability of OES for real-time assessment in Hall thrusters, providing stronger support for lifetime and reliability evaluation.

光学发射光谱法（OES）被广泛应用于霍尔推进器陶瓷沟道侵蚀产物的监测。OES结果的分析依赖于光度测定法，这需要具有相似激发能的谱线。然而，由于缺乏与霍尔推进器中侵蚀产物的b1线激发能相匹配的Xe - I线，这对传统的光光度测定法造成了很大的限制。为了解决这个问题，本工作提出了一种复合线光光度法。通过从多个谱线构建比值，该方法有效地将硼侵蚀产物的相对密度与电子温度分离开来，这是不确定性的主要来源。通过对100 W霍尔推力器的研究，利用881.94 nm和992.32 nm的Xe - I线和249.77 nm的b1线构建了复合线比。结果表明，当电子温度在5 ~ 15 eV之间时，硼原子的相对密度不受电子温度的影响，完全由复合线比决定。与传统的光光度法相比，复合线光光度法在不同加速电压下将侵蚀特性的量化偏差降低了10-38%，在不同质量流量下将侵蚀特性的量化偏差降低了4-25%。本工作建立了基于OES的不同运行条件下侵蚀速率相对测量框架，建立了光谱信号与侵蚀特性之间的直接关联，增强了OES在霍尔推进器中实时评估的能力，为寿命和可靠性评估提供了更有力的支持。

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引用次数: 0

Microwave-enhanced laser-induced breakdown spectroscopy for trace tungsten analysis 微波增强激光诱导击穿光谱法分析痕量钨

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2026-03-01 Epub Date: 2025-11-26 DOI: 10.1016/j.sab.2025.107403

Yuji Ikeda, Joey Kim Soriano

A microwave-enhanced laser-induced breakdown spectrometer (MWE-LIBS) was developed to overcome signal attenuation in conventional LIBS and achieve higher emission intensity and signal-to-noise ratio (SNR) for spectrochemical applications. Tungsten (W) was chosen as the target material due to its high melting point and technological importance. Broadband spectra confirmed strong enhancement of both neutral (W I) and ionic (W II) emissions, with SNR values increased by nearly an order of magnitude compared to standard LIBS. Temporal measurements revealed that microwave coupling sustained plasma emission well beyond the 100 μs microwave pulse duration, supporting extended excitation and recombination cycles that favored ionic transitions. The intensity enhancement factor exceeded 400 under optimum conditions, while calibration with AlW alloys demonstrated detection limits as low as 0.036 wt% (W I) and 0.062 wt% (W II). These results establish MWE-LIBS as a robust technique for trace tungsten detection with potential applications in environmental monitoring, alloy quality control, and advanced materials analysis.

为了克服传统激光诱导击穿光谱仪的信号衰减，实现更高的发射强度和信噪比，研制了微波增强激光诱导击穿光谱仪（MWE-LIBS）。钨(W)由于其高熔点和技术重要性而被选择作为目标材料。宽带光谱证实了中性（W I）和离子（W II）发射的强烈增强，信噪比值比标准LIBS提高了近一个数量级。时间测量表明，微波耦合使等离子体发射持续时间远远超过100 μs，支持有利于离子跃迁的延长激发和复合周期。在最佳条件下，强度增强因子超过400，而用AlW合金校准的检出限低至0.036 wt% （W I）和0.062 wt% （W II）。这些结果表明MWE-LIBS是一种强大的痕量钨检测技术，在环境监测、合金质量控制和先进材料分析方面具有潜在的应用前景。

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引用次数: 0

Tungsten collision-radiation model development and density measurement in argon plasma arc 氩等离子弧中钨碰撞辐射模型的建立及密度测量

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2026-03-01 Epub Date: 2025-12-02 DOI: 10.1016/j.sab.2025.107419

Xing Han , Zhenxiao Li , Haibin Tang

The spectroscopic measurement method for determination of tungsten density is presented by plasma diagnostics and theoretical modeling of spectra. The collision-radiation model applicable to small amounts of tungsten in a high-density plasma is constructed to calculate the densities of neutral tungsten, singly ionized tungsten, and doubly ionized tungsten. The processes taken into account are radiative decay, electron impact excitation, electron impact deexcitation, electron impact ionization, and three-body recombination processes. The densities of different ionization states of tungsten for an applied-field magnetoplasmadynamic thruster cathode at different working currents and magnetic field intensities are diagnosed for verifying the method’s applicability. The experimental results and metallographic analysis of the material show that the lattice structure of the tungsten cathode surface has recrystallized after long-term plasma interaction, resulting in enlarged grain sizes and consequently enhanced erosion resistance.

通过等离子体诊断和光谱理论建模，提出了一种测定钨密度的光谱测量方法。建立了适用于高密度等离子体中少量钨的碰撞辐射模型，计算了中性钨、单电离钨和双电离钨的密度。所考虑的过程有辐射衰变、电子冲击激发、电子冲击去激发、电子冲击电离和三体复合过程。对外加磁场磁等离子体动力推力器阴极在不同工作电流和磁场强度下钨的不同电离态密度进行了诊断，验证了该方法的适用性。实验结果和金相分析表明，经长期等离子体相互作用，钨阴极表面晶格结构发生再结晶，晶粒尺寸增大，抗冲蚀能力增强。

引用次数: 0

Concentration effects of gold nanoparticles on spectral enhancement and plasma parameters in femtosecond LIBS 金纳米粒子浓度对飞秒LIBS光谱增强和等离子体参数的影响

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2026-03-01 Epub Date: 2025-12-06 DOI: 10.1016/j.sab.2025.107421

Yuqi Hu , Dan Yu , Yuanfei Jiang , Anmin Chen , Mingxing Jin

Nanoparticle-enhanced laser-induced breakdown spectroscopy (NELIBS) has attracted significant attention due to its ability to enhance spectral signals and detection sensitivity. However, previous studies have mainly employed nanosecond lasers as excitation sources, and systematic investigations into the enhancement mechanism and concentration optimization under femtosecond laser conditions remain limited. This experiment employed a femtosecond laser with a wavelength of 800 nm and a pulse width of 35 fs. Gold nanoparticle dispersions with varying concentrations (0–125 μg/mL) were dropped onto the surfaces of brass and aluminum substrates, followed by LIBS analysis after drying. The results showed that the spectral intensity and signal-to-noise ratio (SNR) of Cu(I) at 510.5 nm and Al(I) at 396.1 nm increased initially and then decreased as the gold nanoparticle concentration increased. Within the optimal concentration range (3.9–31.25 μg/mL), the intensities of the Cu(I) and Al(I) lines increased by up to approximately 2.3-fold and 1.6-fold, respectively, while the SNR improved by about 2-fold, compared to those without gold nanoparticles (Au NPs). Within this range, the relative standard deviation (RSD) of the spectral intensity was below approximately 20 %; beyond this range, the RSD increased significantly, indicating reduced signal stability. The variation trend of the apparent plasma temperature with concentration was consistent with that of spectral intensity, while the apparent electron density showed a decreasing trend. This study provides an experimental basis for the optimization of NELIBS under femtosecond laser excitation.

纳米粒子增强激光诱导击穿光谱（NELIBS）因其增强光谱信号和检测灵敏度的能力而受到广泛关注。然而，以往的研究主要采用纳秒激光作为激发源，对飞秒激光条件下的增强机理和浓度优化的系统研究仍然有限。本实验采用了波长为800 nm、脉宽为35 fs的飞秒激光器。将不同浓度（0-125 μg/mL）的金纳米颗粒分散体滴至黄铜和铝基底表面，干燥后进行LIBS分析。结果表明：随着金纳米颗粒浓度的增加，510.5 nm处Cu(I)和396.1 nm处Al(I)的光谱强度和信噪比均呈先上升后下降的趋势；在最佳浓度范围（3.9 ~ 31.25 μg/mL）内，与未添加金纳米粒子（Au NPs）相比，Cu(I)和Al(I)谱线的强度分别提高了2.3倍和1.6倍，信噪比提高了约2倍。在此范围内，光谱强度的相对标准偏差（RSD）在20%左右；超过此范围，RSD显著增加，表明信号稳定性降低。等离子体表观温度随浓度的变化趋势与光谱强度的变化趋势一致，而表观电子密度呈下降趋势。该研究为飞秒激光激励下的NELIBS优化提供了实验依据。

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引用次数: 0

WDXRF technique for the assessment of copper valence state and mineral form using L-series lines 用l系列线评价铜价态和矿物形态的WDXRF技术

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2026-03-01 Epub Date: 2025-12-11 DOI: 10.1016/j.sab.2025.107425

Victor M. Chubarov , Alexandr L. Finkelshtein , Galina V. Pashkova , Tatyana A. Radomskaya

An approach utilizing the intensity ratio of copper L-series X-ray emission lines was developed to determine copper mineral forms. Minerals containing predominantly monovalent copper as sulfides (chalcocite, bornite) and oxides (cuprite), as well as divalent copper as sulfides (chalcopyrite) and sulfates (antlerite, brochantite) were studied. A conventional wavelength-dispersive X-ray fluorescence spectrometer with moderate energy resolution (around 15–20 eV at the CuLα line energy (930 eV)) was used for measurements. This resolution is not sufficient to completely resolve the CuLβ and CuLα lines. However, the ratio of the CuLβ and CuLα line intensities differed significantly among various copper minerals: from 0.23 to 0.24 for cuprite and chalcocite to 0.43–0.44 for malachite, antlerite, and brochantite. Investigation of copper‑nickel ores enabled the identification of chalcopyrite as the main copper-containing mineral, which corresponds to X-ray powder diffraction data.

提出了一种利用铜l系列x射线发射谱线强度比测定铜矿物形态的方法。研究了主要含一价铜的硫化物（辉铜矿、斑铜矿）和氧化物（铜矿），以及二价铜的硫化物（黄铜矿）和硫酸盐（角闪石、钙辉石）。使用常规波长色散x射线荧光光谱仪进行测量，该光谱仪具有中等能量分辨率（CuLα线能量（930 eV）约为15-20 eV）。这种分辨率不足以完全分辨CuLβ和CuLα谱线。不同铜矿物中CuLβ和CuLα线强度之比差异显著：铜矿和辉铜矿的CuLβ和CuLα线强度之比为0.23 ~ 0.24，孔雀石、角闪石和枝辉石的CuLβ和CuLα线强度之比为0.43 ~ 0.44。通过对铜镍矿石的调查，鉴定出黄铜矿是主要的含铜矿物，这与x射线粉末衍射数据相一致。

引用次数: 0

Application of the integrated entropy weight and Technique for Order of Preference by Similarity to Ideal Solution model in optimizing the sample pretreatment process for gold analysis in gold ore by Flame Atomic Absorption Spectrometry 综合熵权法和理想溶液模型相似性优先排序技术在火焰原子吸收法分析金矿样品前处理工艺优化中的应用

IF 3.8 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy

Pub Date : 2026-03-01 Epub Date: 2025-12-02 DOI: 10.1016/j.sab.2025.107418

Peng Wang , Tao He , Jianyu Wang , Jiufen Liu , Feirong Meng , Qianni Men , Liming Gan , Xiaowen Jin , Boxin Feng

Activated carbon enrichment combined with flame atomic absorption spectrometry (FAAS) offers a robust approach for gold analysis in geological samples, featuring a wide determination range (e.g., 0.32–92 g t⁻¹ in this study), good reproducibility, and high accuracy. However, its performance is influenced by multiple factors—activated carbon consumption, ash content, adsorption column layers, and washing temperature—requiring systematic optimization. This study addresses this challenge by applying an integrated model that combines the EW theory and technique for order preference by similarity to ideal solution (TOPSIS). Single-factor experiments were first conducted to determine the operational ranges for these four key parameters. A mixed orthogonal design was then implemented, using the absolute relative error (RE) at three gold concentrations (51.8, 18.3, 1.1 μg g⁻¹) as the evaluation index. The EW method objectively assigned weights (0.3120, 0.3219, 0.3661) to these levels, and TOPSIS calculated relative closeness coefficients to rank all experiments. Range analysis identified the optimal parameter combination. Validation under optimized conditions using certified reference materials (GBW(E)070012a, GBW07808b, GBW07809a, GBW07810) confirmed high reliability, with RE and RSD values of 0.11 %–4.69 % and 0.43 %–8.35 %, respectively, complying with industry standard DZ/T 0130.3–2006. The principal novelty of this work lies in the first objective, data-driven application of the integrated EW-TOPSIS model to multi-parameter optimization in FAAS-based geochemical analysis, establishing a transferable paradigm that enhances methodological robustness and operational efficiency in analytical laboratories.

活性炭富集结合火焰原子吸收光谱法（FAAS）为地质样品中的金分析提供了一种可靠的方法，具有测定范围宽（例如，本研究的测定范围为0.32-92 g t - 1），重复性好，准确性高的特点。但其性能受活性炭用量、灰分、吸附柱层数、洗涤温度等因素的影响，需要系统优化。本研究通过应用集成模型解决了这一挑战，该模型结合了电子战理论和理想解相似性排序偏好技术（TOPSIS）。首先进行单因素实验，确定这四个关键参数的作用范围。以3种金浓度（51.8、18.3、1.1 μg−1）下的绝对相对误差（RE）为评价指标，进行混合正交设计。EW方法客观地为这些水平分配权重（0.3120,0.3219,0.3661），TOPSIS计算相对接近系数对所有实验进行排序。极差分析确定了最佳的参数组合。采用标准物质（GBW(E)070012a、GBW07808b、GBW07809a、GBW07810）在优化条件下进行验证，可靠性高，RE和RSD值分别为0.11% ~ 4.69%和0.43% ~ 8.35%，符合行业标准DZ/T 0130.3-2006。这项工作的主要新颖之处在于第一个客观的、数据驱动的综合EW-TOPSIS模型应用于基于faas的地球化学分析的多参数优化，建立了一个可转移的范例，提高了分析实验室的方法稳健性和操作效率。

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引用次数: 0