Spectrochimica Acta Part B: Atomic Spectroscopy最新文献

{"title":"Accuracy improvement of coal quality analysis across different LIBS systems by wavelength shift self-calibration and transfer learning","authors":"Shuwen Tan ,&nbsp;Huaiqing Qin ,&nbsp;Chengjun Li ,&nbsp;Weizhe Ma ,&nbsp;Xianmao Yang ,&nbsp;Shunchun Yao","doi":"10.1016/j.sab.2025.107394","DOIUrl":"10.1016/j.sab.2025.107394","url":null,"abstract":"<div><div>Laser Induced Breakdown Spectroscopy (LIBS) has great potential in rapid analysis of coal quality due to the unique advantages of no complex sample pretreatment, simultaneous analysis of multiple elements and fast detection. However, due to the deviation in the precision of instrumentation, there are signal intensity difference and wavelength shift in spectra collected from different instruments. As a result, the effective quantitative analysis model based on the master instrument cannot be applied to the slave instrument, which hinders the application of LIBS. Therefore, this paper proposed a method combining wavelength shift self-calibration with feature transfer learning to improve the applicability of quantitative analysis model of coal quality. The wavelength shift between master and slave instruments was corrected by the wavelength shift self-calibration method based on the standard deviation value of characteristic peak intensity. Then, the transfer learning method based on Kernel Principal Component Analysis (KPCA) and Piecewise Direct Standardization (PDS) was used to fit the spectral features between slave instrument and master instrument. Finally, the quantitative analysis model of coal quality was established by the random forest (RF). Furthermore, the Competitive Adaptive Reweighted Sampling (CARS) feature selection method was used to select the input of model. As a result, the proposed CARS-KPCA-PDS method was able to improve the adaptability of quantitative models across different LIBS Systems. Compared with the RF model without transfer learning, the mean absolute error (MAE_P) of CARS-KPCA-PDS model in predicting calorific value, carbon content and ash content were reduced by 58.32 %, 71.67 % and 77.48 %. The results demonstrated that the proposed method could improve the applicability of quantitative analysis model to different instruments and reduce the modeling cost.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"235 ","pages":"Article 107394"},"PeriodicalIF":3.8,"publicationDate":"2025-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145569215","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":"Femto- and picosecond laser induced breakdown spectrometry signals statistics","authors":"V.N. Lednev ,&nbsp;P.A. Sdvizhenskii ,&nbsp;A.V. Rogachevskaya ,&nbsp;P.A. Chizhov ,&nbsp;A.A. Ushakov ,&nbsp;V.V. Bulgakova ,&nbsp;V.A. Zavozin ,&nbsp;S.M. Pershin ,&nbsp;A.F. Bunkin","doi":"10.1016/j.sab.2025.107393","DOIUrl":"10.1016/j.sab.2025.107393","url":null,"abstract":"<div><div>The femto- and picosecond laser induced breakdown spectroscopy (LIBS) signals statistics have been studied in detail. The picosecond laser pulse energies distribution function followed to the Gaussian profile while that for the femtosecond pulse energy slightly deviated from the normality. The same laser system generated both femto- (200 fs) and picosecond (120 ps) pulses which ablated aluminum alloy in the air. Spatially, spectrally, and temporally resolved atomic, molecular and background plasma emission signals have been quantified to reveal the LIBS signals statistics. Unlike for nanosecond ablation, femtosecond and picosecond LIBS signals were distributed normally. Plasma electron temperature was determined for each single shot plasma to estimate temperature fluctuations on observed LIBS emission signals distribution functions. It was demonstrated that plasma temperature fluctuations had little influence on femtosecond LIBS signals statistics but had a moderate impact on picosecond plasma case. The greater influence of temperature fluctuations on LIBS signals distribution function for picosecond ablation were attributed to laser-plasma interaction.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"235 ","pages":"Article 107393"},"PeriodicalIF":3.8,"publicationDate":"2025-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145569211","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":"Investigation of signal enhancement of aluminum emission in LIBS using gold nanoparticles in air and vacuum","authors":"Swetapuspa Soumyashree,&nbsp;Prashant Kumar","doi":"10.1016/j.sab.2025.107395","DOIUrl":"10.1016/j.sab.2025.107395","url":null,"abstract":"<div><div>The present study aims to understand the temporal changes in emission line intensity observed in nanoparticle enhanced LIBS for experiments conducted under different ambient conditions. Although nanoparticles have been extensively used for signal enhancement in LIBS, only a handful of literature exists which discusses their behavior in low-pressure ambient. We have carried out a systematic study of signal enhancement in LIBS in presence of nanoparticles for both neutral and ionic lines in vacuum and air ambient. We have observed 2–3 times signal enhancement in the emission line intensities of neutral species in nanoparticle enhanced LIBS in both ambient. While ionic species show a similar enhancement in air for LIBS with nanoparticles, the trend is opposite in case of vacuum. The observed signal enhancements in LIBS in presence of nanoparticles for both neutral and ionic species were explained through the study of plasma parameters, temperature and electron number density. Temporal evolution of signal enhancements was compared for air and vacuum ambient for both neutral and ionic lines emphasizing the role of acquisition delay and proper selection of emission lines in case of nanoparticle enhanced LIBS.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"235 ","pages":"Article 107395"},"PeriodicalIF":3.8,"publicationDate":"2025-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145569213","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":"A compact, low-power total reflection X-ray fluorescence (TXRF) spectrometer designed for surface metal contamination analysis of silicon wafers","authors":"Xingyu Wang,&nbsp;Siyu Liao,&nbsp;Lu Chen,&nbsp;Jiatong Li,&nbsp;Lian Chen,&nbsp;Daqian Hei","doi":"10.1016/j.sab.2025.107388","DOIUrl":"10.1016/j.sab.2025.107388","url":null,"abstract":"<div><div>Total reflection X-ray fluorescence (TXRF) is a key analytical technique for detecting surface metal contamination on silicon wafers. While mature commercial instruments provide excellent detection performance, they are typically large, heavy, and equipped with high-power X-ray tubes, the use of high-power X-ray tubes (The X-ray tube typically operates at a power of approximately 1500 W.) leads to increased power consumption. In this study, a compact, low-power TXRF-based spectrometer was developed specifically for wafer metal contamination detection. A new quantitative analysis method was employed to mitigate the effects associated with the use of a low-power X-ray tube. The instrument's performance was evaluated using silicon wafers deliberately contaminated with Fe, Ni, and Cu. Elemental mapping and quantitative analysis were conducted using custom Python-based software. The results demonstrate that the spectrometer offers reliable sensitivity and accuracy for detecting surface contaminants on silicon wafers.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"235 ","pages":"Article 107388"},"PeriodicalIF":3.8,"publicationDate":"2025-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145517471","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":"Energy transfer mechanism of Kr atoms influenced by He atoms during laser-induced ionization for metastable state generation","authors":"Shu Hu ,&nbsp;Jia Wu ,&nbsp;Shangmin Wang ,&nbsp;Tao Li ,&nbsp;Zihao Liu ,&nbsp;Xianglong Cai ,&nbsp;Baodong Gai ,&nbsp;Ming Xu ,&nbsp;Yannan Tan ,&nbsp;Jialiang Zhang ,&nbsp;Jingwei Guo","doi":"10.1016/j.sab.2025.107391","DOIUrl":"10.1016/j.sab.2025.107391","url":null,"abstract":"<div><div>The laser-induced ionization of Kr<img>He mixture was used to prepare metastable 5s[3/2]₂ level Kr atoms. By analyzing the temporal evolution of the Kr 760.15 nm (5p[3/2]₂ → 5s[3/2]₂) spectral line intensity, three stages of metastable production were confirmed: the “photon excitation + radiation” process, the “electron-impact excitation + radiation” process, and the “ion-electron recombination” process. In the “electron-impact excitation + radiation” stage, the total collisional decay rate constant for Kr^⁎ atoms at the 5p[3/2]₂ level associated with the buffer gas He atoms was (0.0179 ± 0.0012) × 10⁻¹¹ cm³ s⁻¹, which confirmed that under laser-induced ionization, the collision contributions from other levels to the 5p[3/2]₂ level Kr atoms were significant. This revealed that He atoms inhibit the reionization of Kr atoms due to their interference and slowing effect on the energy pooling process of Kr atomic levels. In the “ion-electron recombination” stage, the total collisional decay rate constant for Kr^⁎ atoms at the 5p[3/2]₂ level associated with He atoms was (0.0008 ± 0.0001) × 10⁻¹¹ cm³ s⁻¹, which was essentially the same as the total collisional decay rate constant for pure Kr gas in this stage. This again indicated that in the continuous recombination process of ions and electrons, the collisional replenishment rate from the Rydberg states to the 5p[3/2]₂ level dominates, masking the difference in collisional decay rates between the Kr<img>He mixture and pure Kr gas.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"235 ","pages":"Article 107391"},"PeriodicalIF":3.8,"publicationDate":"2025-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145517470","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":"Quantitative LIBS imaging of cadmium in plant tissues with matrix-based calibration supported by micro-X-ray fluorescence spectroscopy","authors":"Ludmila Čechová ,&nbsp;Daniel Holub ,&nbsp;Michal Kurka ,&nbsp;Miloslav Pouzar ,&nbsp;Pavel Pořízka ,&nbsp;Jozef Kaiser","doi":"10.1016/j.sab.2025.107389","DOIUrl":"10.1016/j.sab.2025.107389","url":null,"abstract":"<div><div>Laser-induced Breakdown Spectroscopy (LIBS) is an increasingly popular method for elemental bioimaging, primarily due to its fast and multi-elemental analysis. However, achieving quantitative accuracy is highly challenging, mainly due to the strong matrix effect present in biological matrices and the lack of spatially adaptive calibration strategies. When using the conventional pixel-to-pixel calibration approach, it typically assumes a uniform sample matrix, which leads to high quantification errors when applied to biological and plant tissues. Therefore, there is a need for novel calibration methods based on a delocalized approach that take matrix variability into consideration when dealing with biological samples. This study introduces a novel delocalized approach for quantitative bioimaging of elements, particularly cadmium (Cd) and calcium (Ca), in plant tissue. A controlled sample set of <em>Cannabis sativa</em> plants contaminated with three different Cd concentrations was analysed at matching spatial resolution using micro-X-ray fluorescence (micro-XRF) and LIBS. A conventional pixel-to-pixel calibration was initially employed as a baseline strategy but yielded high mean absolute percentage errors (MAPE) exceeding 40 % for Cd. Therefore, a delocalised approach was developed to overcome these limitations, leveraging clustering algorithms to construct a matrix-based calibration model. This method significantly improved quantification accuracy, reducing MAPE for Cd to as low as 8.7 %, while Ca quantification achieved a score of 1.1 % MAPE. The model also exhibited minimal bias, with errors in the parts-per-million range. These results demonstrate that advanced feature selection and clustering-based calibration enable accurate quantification in highly heterogeneous plant matrices. The proposed delocalized approach demonstrates a significant advance in LIBS imaging methodology by addressing a key limitation in pixel-to-pixel calibration and may be applicable to a broader range of elements in other biological and heterogeneous systems.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"235 ","pages":"Article 107389"},"PeriodicalIF":3.8,"publicationDate":"2025-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145517469","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":"Improving limit of detection for Cr in total reflection X-ray fluorescence analysis via freeze concentration with double-internal-reference method","authors":"Tsugufumi Matsuyama ,&nbsp;Airi Tsuji ,&nbsp;Arinori Inagawa ,&nbsp;Lee Wah Lim","doi":"10.1016/j.sab.2025.107390","DOIUrl":"10.1016/j.sab.2025.107390","url":null,"abstract":"<div><div>We developed a sample preparation method for total reflection X-ray fluorescence (TXRF) analysis based on a freeze concentration technique to enhance sensitivity. To stabilize the frozen concentration, glycerol, which contains three hydroxyl groups, was added to the sample solution. We also developed a double-internal-reference method for simultaneously determining the concentration rate and the target element concentration before freezing. A Cr-containing sample solution was prepared as the target element, mixed with glycerol and Mn (first internal reference element), and then frozen. The exuded solution was collected and mixed with In (second internal reference element). The concentration rate was determined by comparing the X-ray fluorescence signals of the internal references, whereas the target element concentration was derived from the relationship between the fluorescent X-rays of the target and internal reference elements. Without freeze concentration, the limit of detection (LOD) for Cr using a portable TXRF instrument was 257 ng/mL. With freeze concentration and the addition of glycerol (0.05 mL), the average concentration rate was increased by 29.4-time, improving the LOD to 42.7 ng/mL, and a recovery rate of 100 % was achieved. The freeze concentration combined with a double-internal-reference was proven to be highly effective for sensitive TXRF analysis.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"235 ","pages":"Article 107390"},"PeriodicalIF":3.8,"publicationDate":"2025-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145569214","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":"Interference-free nitrogen detection under the atmospheric condition with LIBS in cements using a commercially available fiber laser","authors":"Tianyang Sun,&nbsp;Yunfei Rao,&nbsp;Li Wang,&nbsp;Ding Li,&nbsp;Haoyu Yang,&nbsp;Chen Sun,&nbsp;Jin Yu","doi":"10.1016/j.sab.2025.107383","DOIUrl":"10.1016/j.sab.2025.107383","url":null,"abstract":"<div><div>Determination of nitrogen in solid-state materials using laser-induced breakdown spectroscopy (LIBS) under the atmospheric pressure faces the challenge of interference from nitrogen present in the ambient gas. Previous studies have proposed various strategies to address this issue, such as employing a vacuum chamber or purging the laser interaction zone with an inert gas, with the cost of increasing the complexity of a LIBS instrument. Fiber lasers with their recent industrial development present a promising opportunity for LIBS applications due to their inherent advantages, such as compactness, stability, and cost-effectiveness. Determination of a nonmetal element such as nitrogen in solid-state materials using a fiber laser remains to be demonstrated. Performing a such demonstration, with a particular focus on investigating an interference-free regime in LIBS operation, is precisely the purpose of this work. A series of nitrogen-bearing samples was prepared using cement as the matrix material and silicon nitride as the nitrogen-containing dopant. The experiments were conducted using a commercially available Q-switched Nd:YAG fiber laser operating at 1064 nm, with a pulse duration of 100 ns, a repetition rate of 5 kHz, and a pulse energy of 640 μJ. The N I 744.2 nm emission line was clearly observed, and our investigation confirmed that it originated from the sample rather than the ambient gas. This enabled a univariate regression of the spectral intensity against the nitrogen concentration. To further improve the analytical performance, feature selection was combined with multivariate regression using the partial least squares (PLS) algorithm. The resulting model achieved a limit of detection (LOD) of 0.46 wt%, a relative error of prediction (REP) of 2.22 %, and a root mean square error of prediction (RMSEP) of 0.12 wt%. Such results represent a significant improvement with respect to the state-of-art performance for nitrogen determination in solid-state materials with LIBS, with for example a reported LOD of 0.8 wt% for a determination of nitrogen in sands (Harris et al., 2004 [1]), demonstrating thus the capability of fiber laser LIBS for accurate nitrogen determination in solid-state materials under the atmospheric conditions, without the need of additional equipment such as vacuum or gas purging systems.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"235 ","pages":"Article 107383"},"PeriodicalIF":3.8,"publicationDate":"2025-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145517472","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":"Casting-solidification preparation combined with substitution-dilution algorithm for accurate EDXRF analysis of silicate rocks","authors":"Bo Wang ,&nbsp;Wenbao Jia ,&nbsp;Xiaoran Chen ,&nbsp;Kai Zeng ,&nbsp;Zhichao Zhang ,&nbsp;Qing Shan ,&nbsp;Yongsheng Ling","doi":"10.1016/j.sab.2025.107385","DOIUrl":"10.1016/j.sab.2025.107385","url":null,"abstract":"<div><div>The accurate energy-dispersive X-ray fluorescence (EDXRF) analysis of high-silica silicate rocks is notoriously challenging due to their poor cohesiveness, which prevents the formation of stable pressed pellets, and the scarcity of matrix-matched reference materials. To address these limitations, this study introduces a novel integrated methodology that synergistically combines an innovative <!--> <!-->casting-solidification preparation technique with a robust substitution-dilution quantification algorithm. The preparation method employs metallographic resin to embed powdered samples, effectively overcoming cohesion issues and producing highly homogeneous (RSD &lt; 4 %) and reproducible (RSD &lt; 5.19 %) pellets. The mathematical algorithm leverages a fundamental hyperbolic relationship between the X-ray intensity and the substitution factor, enabling highly accurate quantification of major oxides (SiO₂, Al₂O₃, K₂O, CaO) using only a single standard reference material—thereby eliminating the critical dependency on multiple matrix-matched standards. Validation against a range of certified reference materials demonstrated excellent accuracy, with relative errors for major oxides ranging from 1.53 % to 6.72 %<!--> <!-->. A comprehensive uncertainty evaluation confirmed expanded uncertainties below <!--> <!-->7.4 % at a 95 % confidence level. This integrated approach establishes a new, cost-effective, and reliable paradigm for EDXRF analysis of complex silicate materials.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"235 ","pages":"Article 107385"},"PeriodicalIF":3.8,"publicationDate":"2025-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145517467","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":"Ag NP-coated filter paper as a nanoparticle-enhanced laser-induced breakdown spectroscopy substrate for quantitative detection of potassium","authors":"Xinxin Zhang ,&nbsp;Yumeng Yuan ,&nbsp;Zihao Guo ,&nbsp;Xue Chen ,&nbsp;Xiaohui Li","doi":"10.1016/j.sab.2025.107386","DOIUrl":"10.1016/j.sab.2025.107386","url":null,"abstract":"<div><div>Accurate monitoring of serum potassium (K) levels is essential for clinical diagnostics due to their vital roles in maintaining physiological functions. Although laser-induced breakdown spectroscopy (LIBS) enables rapid elemental analysis, its limited sensitivity and precision restrict its effectiveness in quantifying K in complex biological samples. This study explores the application of silver nanoparticle-coated filter paper (Ag NPs paper) as a substrate for nanoparticle-enhanced LIBS (NELIBS) to improve the quantitative detection of K. First, the preparation process of the Ag NPs paper substrate was systematically optimized. The optimal K detection signal was obtained with the Ag NPs paper substrate treated with 1.5 mol/L NaCl and colloidal Ag NPs at neutral pH. Then, the optimized Ag NPs paper was employed for quantitative determination of K in potassium-chloride (KCl) aqueous solution and fetal bovine serum (FBS), including hypokalemia, hyperkalemia, and normal potassium levels. Under these conditions, the limit of detection (LoD) of NELIBS for K was lower than that of normal LIBS, decreasing from 2.29 mmol/L (89.3 mg/L) to 0.81 mmol/L (31.6 mg/L) in KCl aqueous solution and from 0.96 mmol/L (37.4 mg/L) to 0.32 mmol/L (12.5 mg/L) in FBS, respectively. It also enabled reliable discrimination of concentration changes as small as 0.5 mmol/L. These findings highlight the feasibility of NELIBS for sensitive and accurate detection of electrolyte elements in complex biological samples, offering promising prospects for clinical diagnostics.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"235 ","pages":"Article 107386"},"PeriodicalIF":3.8,"publicationDate":"2025-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145466866","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}