Journal of Analytical Atomic Spectrometry最新文献

{"title":"Titanomagnetite, a new potential geochronometer for in situ U–Pb dating","authors":"Yanwen Tang, Na Liu, Jianfeng Gao, Junjie Han, Zhongjie Bai, Ting-guang Lan","doi":"10.1039/d4ja00254g","DOIUrl":"https://doi.org/10.1039/d4ja00254g","url":null,"abstract":"Titanomagnetite occurs commonly in igneous and metamorphic rocks, and various types of deposits, and serves as a valuable indicator. Recently, it has been identified as a new geochronometer for U–Pb dating. However, no reference material is available currently. Thus, we used a titanomagnetite sample HG79c with a known age of 259.2 ± 2.8 Ma to evaluate potential primary standards and establish an accurate calibration method for widespread application. In our in-situ U–Pb dating experiments, different ablation settings were optimized, i.e., spot sizes of 44 and 60 μm, laser frequencies of 6, 8, and 10 Hz, and energy densities of 3, 4, and 8 J cm−2. 3ml min−1 nitrogen was introduced to enhance sensitivity and reduce matrix effects. Five Concordia-intercept 206Pb/238U ages were obtained for HG79c using cassiterite AY-4 as an external standard, and four are consistent with or slightly younger than the reference age within errors. Two accurate ages were obtained when HG79c was calibrated by zircon 91500 and garnet PL-57. All these age results and Pb/U fractionation confirm that cassiterite and zircon have a normalized Pb/U ratio consistent with titanomagnetite in some optimized ablation settings. We utilized cassiterite AY-4 as the primary standard, HG79c as quality control in an optimized ablation setting, i.e., a spot size of 60 μm, energy density of 4 J cm−2, and laser frequency of 6 Hz, to date titanomagnetite LL22-137 from the Lala Fe-Cu deposit in the Kangdian IOCG metallogenic province, China. This titanomagnetite yielded a Concordia-intercept 206Pb/238U age of 853.2 ± 9.9 Ma, which agrees well with the intergrown rutile U–Pb age of 850.8 ± 8.7 Ma and the published U–Pb ages for apatite and secondary allanite, and Re-Os age for molybdenite from the same deposit. This method offers a new tool for directly dating diagenesis and ore-forming processes related to Fe and Ti metals.","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247764","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 simplified instrumental protocol for trace Nd and Hf isotope measurements (<10 ng) by MC-ICP-MS and Apex Omega de-solvating system","authors":"Ting Zhou, Liang Qi, shenghua Liu, bo Zhou","doi":"10.1039/d4ja00276h","DOIUrl":"https://doi.org/10.1039/d4ja00276h","url":null,"abstract":"We reported a simple technique allowing accurate and precise Nd and Hf isotope measurements of samples with low contents by the Neptune Plus MC-ICP-MS and Apex Omega membrane de-solvating system. By employing high sensitive Jet sample cone and X skimmer cone, our protocol achieved low oxide level (&lt;0.05 %) at high ion transmission (~880 V/ppm for Nd and 850 V/ppm for Hf) and was found to have little effect on the mass fractionation of Nd and Hf. This was accomplished by simple adjustments of the sweep gas of membrane de-solvating system and the sample gas of nebulizer. Instrumental sensitivities were enhanced by a factor exceeding tenfold, in comparison to those of the standard measurements by wet plasma. Long term measurements of 1 ng Nd solution standards yield 143Nd/144Nd ratios of 0.512117±0.000032 (2SD, n=24) and 0.512227±0.000036 (2SD, n=42) for Jndi-1 and JMC-Nd solutions respectively, while analysis of 1 ng JMC475 Hf gave 176Hf/177Hf ratios of 0.282163±0.000027 (2SD, n=21). These results are in agreements with their reference values. Potential interfering elements Ce and Sm are found to have insignificant influence on 143Nd/144Nd ratios. Lu and Yb have remarkable effect on 176Hf/177Hf ratios. Improved correction performance can be achieved by using Lu and Yb ratios obtained by analyzing pure Lu and Yb solutions. Five chemically purified rock reference materials are measured with the presented method and the results are consistent with their recommended values. Relative to other approaches, this protocol is rapid and accurate, and can be widely applied in Nd and Hf isotope analysis of samples with trace amounts of Nd and Hf (&lt;10 ng).","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247726","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":"Simultaneous determination of the oxygen isotope ratio and vola-tile composition of apatite with high lateral resolution via nano-secondary-ion mass spectrometry","authors":"Youwei Chen, Jianfeng Gao, Xianwu Bi, Shaohua Dong, Quanliang Lei, RuiZhong Hu","doi":"10.1039/d4ja00183d","DOIUrl":"https://doi.org/10.1039/d4ja00183d","url":null,"abstract":"Apatite is commonly used as a tracer in Earth and planetary sciences by leveraging its oxygen isotopes and volatile compo-sitions to elucidate the derivation and evolution of magma and geological fluids. While secondary-ion mass spectrometry has proven effective in determining these compositions in apatite, the challenge lies in its relatively large spot size (＞20μm), and obtaining O isotope and volatile data from different grains or domains. In addition, the sequential analysis of volatiles is both time-consuming and constrained by limited data, leading to increased uncertainties in subsequent elemental analysis. This hinders robust interpretations for geological events and the determination of smaller-grained apatite. In this study, we propose a high lateral resolution (~7μm）method for the simultaneous analysis of the O isotope ratio and volatile (OH, F, Cl, and S) composition of apatite. The analysis of the eight apatite standards using this method yields results that are consistent with literature values, demonstrating its reliability and robustness. This innovative approach stands out not only for its high lateral resolution but also for its enhanced data robustness, laying a solid foundation for further scientific investigation and analysis.","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247766","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":"Development and application of reference and routine analytical methods providing SI-traceable results for the determination of technology-critical elements in PCB from WEEE","authors":"Giancarlo D'Agostino, Marcus Oelze, Jochen Vogl, Jean-Philippe Ghestem, Nicolas Lafaurie, Ole Klein, Daniel Pröfrock, Marco Di Luzio, Luigi Bergamaschi, Radojko Jaćimović, Caroline Oster, Johanna Irrgeher, Shaun T. Lancaster, Anna Walch, Anita Roethke, Lena Michaliszyn, Axel Pramann, Olaf Rienitz, Timo Sara-Aho, Oktay Cankur, Derya Kutan, johanna noireaux","doi":"10.1039/d4ja00235k","DOIUrl":"https://doi.org/10.1039/d4ja00235k","url":null,"abstract":"The recovery and reprocessing of Technology-Critical Elements (TCE) present in printed circuit boards (PCB) from electrical and electronic waste is essential both for recycling valuable materials subject to supply risk and for reducing the environmental impact. Although the quantitative knowledge of TCE amounts in end of life PCB plays a key role, there are neither matrix certified reference materials nor harmonized analytical methods available to establish the traceability of the results to the International System of Units. To fill these gaps, we developed and applied reference analytical methods based on ICP-MS standard addition calibrations and INAA <em>k</em><small>₀</small>- and relative calibrations suitable to certify reference materials. In addition, we developed and tested analytical methods based on more commonly used ICP-MS external standard calibrations to provide routine methods. Sample preparation methods and measurement procedures accounting for issues due to the high heterogeneity of the PCB material and interferences arising from the matrix components are described. TCE mass fraction results obtained with reference and routine methods are compared to highlight possible discrepancies.","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247769","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":"Packing thickness dependent plasma emission induced by laser ablating thin-layer microgranular materials","authors":"Kou Zhao, Qiang Zeng, Yaju Li, Shu Hang Gong, Yifan Wu, Xiangyu Shi, Jinrui Ye, Xueqi Liu, Xinwei Wang, Dongbin Qian, Liangwen Chen, Shaofeng Zhang, Lei Yang and Xinwen Ma","doi":"10.1039/D4JA00213J","DOIUrl":"10.1039/D4JA00213J","url":null,"abstract":"<p >An experimental study on the packing thickness (PT) dependent plasma emission caused by laser ablating thin-layer microgranular samples in air was conducted using three sets of size-selected copper grains (median size <em>d</em><small>₅₀</small> = 53 μm, 72 μm, and 100 μm, respectively). For each size-selected case, the PT parameter was tuned from 0.15 to 1.00 mm through varying the amount of grains packed into a vessel with a steel bottom wall and the emission spectra of laser-induced plasma were measured at various PT. It is found that there is a striking threshold phenomenon in the measured behavior of PT-dependent plasma emission. Specifically, when PT is less than a threshold PT<small>_th</small>, the emission intensity exhibits an exponential decreasing with incremental thickness; however, when it exceeds PT<small>_th</small>, the emission intensity becomes almost constant. It is also found that the PT<small>_th</small> slightly depends on grain size but the ratio of PT<small>_th</small> to <em>d</em><small>₅₀</small> seems to be size independent. Combining the mechanical fundamentals of granular materials, we interpreted the findings by considering a PT-dependent effect of the vessel's bottom on the formation circumstance of a laser-induced plasma. This work has practical significance in assessing a threshold thickness above which laser-induced breakdown spectroscopy, as an analytical technique to quantify elements embedded in microgranular materials, is viable regardless of PT difference.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207130","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":"Bimodal data fusion of LIBS spectroscopy and plasma acoustic emission signals: improving the accuracy of machining process identification for low roughness samples","authors":"Shilei Xiong, Minchao Cui, Nan Yang, Guangyuan Shi, Yuxin Pi, Yuyang Mu, Yuntao Zhang, Yue Zhao","doi":"10.1039/d4ja00225c","DOIUrl":"https://doi.org/10.1039/d4ja00225c","url":null,"abstract":"The identification of machining processes for low roughness samples is extremely challenging, and a reasonably quick identification of machining processes for low roughness parts is critical to ensuring that the samples are employed in the appropriate conditions and improving work efficiency. In this work, a new identification method of fusion of LIBS spectra and plasma acoustic emission signals (PAES) with bimodal information is proposed, and the LIBS spectral data and PAES data of nine types of low roughness samples processed by three machining processes, namely horizontal milling, plain grinding, and vertical milling, are recorded and analyzed. The spectral intensities of the primary element Fe and trace element Mn are compared and analyzed. The spectrum intensities of the primary element Fe and trace element Mn, as well as the PAES maximum peak, are compared and examined. Using the PCA-SVM machine learning technique, the three recognition impacts of single LIBS data, single PAES data, and LIBS-PAES bimodal data fusion are examined and compared. At Ra = 0.4 μm and 0.8 μm, vertical milling produces significantly higher spectral intensities than plain grinding and horizontal milling, while horizontal milling produces significantly higher intensities than plain grinding. When the surface roughness of the samples is the same, variations in the machining process cause changes in the PAES. The recognition accuracy was 86.67% for the test set of single LIBS spectral data, 78.89% for the test set of single PAES data, 97.11% for the training set, and 91.11% for the test set of LIBS-PAES bimodal data fusion, respectively. When compared to single-modal data recognition, bimodal data fusion greatly improves recognition ability, fully reflecting the benefits of bimodal data fusion. Based on the results of this study, it can be preliminarily concluded that the fusion of spectral and acoustic information in laser-induced breakdown spectroscopy detection is very promising in recognizing the surface state of parts in the machining field.","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207147","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":"Rapid and accurate determination of chlorine isotopic ratios with ICP-MS/MS using O2 reaction gas†","authors":"Tyler D. Schlieder, Nicole D. Rocco, Maria Laura di Vacri, Isaac J. Arnquist, Danny Bottenus, Zachary Huber and Bruce McNamara","doi":"10.1039/D4JA00191E","DOIUrl":"10.1039/D4JA00191E","url":null,"abstract":"<p >Chlorine isotopic ratio measurements are useful for stable isotope tracing, isotopic abundance measurements in nuclear chemistry, and accurate determination of concentrations using isotope dilution methods. Accurate and precise determination of Cl isotopic ratios using inductively coupled plasma mass spectrometry (ICP-MS) methods is challenging due to major polyatomic interferences of <small>¹⁶</small>O<small>¹⁸</small>O<small>¹</small>H<small>⁺</small> and <small>³⁶</small>Ar<small>¹</small>H<small>⁺</small> on <small>³⁵</small>Cl<small>⁺</small> and <small>³⁷</small>Cl<small>⁺</small>, respectively. Previous work has demonstrated that using tandem mass spectrometry (ICP-MS/MS) with either H<small>₂</small> or O<small>₂</small> gas in the collision/reaction cell can significantly improve the precision, but not necessarily the accuracy, of chlorine isotopic measurements over single-quadrupole techniques. In this work, we further investigate ICP-MS/MS, using O<small>₂</small> as a reaction gas, as a technique for accurate determination of Cl isotopic ratios. Using the methodology developed herein we measure both natural and enriched chlorine isotopic ratios in diverse samples matrices, targeting <small>³⁷</small>Cl isotope enrichment efforts, without the need for complex front-end chemistry (<em>i.e.</em>, ion exchange chromatography), while maintaining a typical accuracy and precision better than ∼1%. The reduced need for time-consuming sample processing afforded by this method results in higher sample throughput (&gt;80 measurements/day) relative to other analytical techniques (<em>e.g.</em>, thermal ionization mass spectrometry, accelerator mass spectrometry, <em>etc.</em>). This work demonstrates that ICP-MS/MS with O<small>₂</small> as a reaction gas can be a useful tool for making rapid and accurate chlorine isotopic ratio measurements.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ja/d4ja00191e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-precision low-level Cd isotopic analysis using MC-ICP-MS and its application to marine samples from Terra Nova Bay (Antarctica)†","authors":"Maria Alessia Vecchio, Lana Abou-Zeid, Marco Grotti and Frank Vanhaecke","doi":"10.1039/D4JA00214H","DOIUrl":"10.1039/D4JA00214H","url":null,"abstract":"<p >This study presents the development, validation and use of an approach for precise and accurate cadmium (Cd) isotopic analysis at low concentration levels using multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS). The MC-ICP-MS unit used was equipped with a standard sample introduction system, thus using an ICP operated under wet plasma conditions, and Faraday cup amplifiers equipped with a 10<small>¹³</small> Ω resistor. One-column anion exchange chromatography allowed isolation of Cd with 80–99% recovery and absence of an effect of potential on-column fractionation on the isotope ratio results was demonstrated. Use of both an internal (using Ag) and an external (measured in a sample-standard bracketing sequence) standard was relied on for correction of the bias introduced by instrumental mass discrimination. A long-term precision of 0.09‰ (2SD) for <em>δ</em><small>^114/110</small>Cd was achieved at a Cd concentration of 10 ng mL<small>⁻¹</small>. The method developed was validated by analysing NIST SRM 2711a (Montana soil) and NRC TORT-3 (Lobster hepatopancreas) reference materials, yielding results consistent with literature values. Subsequently, the method was applied to two Antarctic marine organisms <em>Adamussium colbecki</em> and <em>Trematomus bernacchii</em>, collected during both the 1990s and 2020s, to investigate its potential for identifying changes in the biogeochemical cycle of Cd over time and reveal natural or anthropogenic sources. A preferential uptake of the lighter Cd isotopes in both species was observed, indicated by negative <em>δ</em><small>^114/110</small>Cd values ranging between −0.24 and −0.09‰. This finding is consistent with previous studies that have reported Cd fractionation during its uptake by marine organisms, with a preference for the lighter isotopes. No significant differences in <em>δ</em><small>^114/110</small>Cd values were observed between organs of the same species or between the same species collected in the different decades, suggesting minimal Cd isotope fractionation during internal transfer and consistent Cd sources over time. Comparison with literature data suggests that the Cd source in Antarctic biota may be predominantly of natural origin, with <em>δ</em><small>^114/110</small>Cd values indicating isotopically heavier Cd than that found in Cd-polluted areas. However, further Cd isotope ratio data from various Antarctic sample types are necessary to further evaluate the Cd sources in marine samples.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ja/d4ja00214h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of M6 monazite as a potential reference material for in situ microbeam analyses of U–Th–Pb geochronology and O–Nd isotopes†","authors":"Zhi Chen, Li-Guang Wu, Xiao-Xiao Ling, Jörn-Frederik Wotzlaw, Cyril Chelle-Michou, Yang Li, Zhen-Hui Hou, Wen-Lei Song, Qian Mao, Wen-Qiang Yang, Yu Liu, Guo-Qiang Tang, Jiao Li, Qiu-Li Li and Xian-Hua Li","doi":"10.1039/D4JA00246F","DOIUrl":"10.1039/D4JA00246F","url":null,"abstract":"<p > <em>In situ</em> U–Th–Pb geochronology of monazite is widely used to reveal geological histories. Well characterized matrix-matched reference materials are crucial for achieving accurate results in microbeam U–Th–Pb dating. In this paper, the internal structure, chemical composition and U–Th–Pb dates of M6 monazite are investigated using multiple analytical methods to evaluate its potential as a reference material for <em>in situ</em> monazite U–Th–Pb dating. The results show that M6 monazite has an average ThO<small>₂</small> content of 10.7 ± 1.1% (2SD; SD = standard deviation) and Th/U ratio of 28.4 ± 3.3 (2SD). <em>In situ</em> U–Th–Pb dates from laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) and secondary ion mass spectrometry (SIMS) laboratories are reproducible and homogeneous at the spatial level of 30 μm. Seven <small>²⁰⁷</small>Pb/<small>²³⁵</small>U dates from isotope dilution-thermal ionisation mass spectrometry (ID-TIMS) yield a mean date of 485.7 ± 2.3 Ma (2SD), which is our recommended date for M6 monazite. Furthermore, SIMS oxygen isotope determinations show good measurement reproducibility (7.70‰ ± 0.41‰, 2SD) and the LA-MC-ICP-MS analyses yield homogeneous Sm–Nd isotopic composition (<small>¹⁴³</small>Nd/<small>¹⁴⁴</small>Nd = 0.511829 ± 0.000045, 2SD; <small>¹⁴⁷</small>Sm/<small>¹⁴⁴</small>Nd = 0.2302 ± 0.0139, 2SD), demonstrating that M6 monazite has the potential to be a reference material for <em>in situ</em> O and Sm–Nd isotopic analyses.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207162","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":"Statistical behaviour of laser-induced plasma and its complementary characteristic signals†","authors":"Jakub Buday, Daniel Holub, Pavel Pořízka and Jozef Kaiser","doi":"10.1039/D4JA00126E","DOIUrl":"10.1039/D4JA00126E","url":null,"abstract":"<p >In this work, we present a study aimed at the statistical distribution of characteristic signals of laser-induced plasmas. This work mainly focuses on observing statistical distribution for repetitive measurement of spectra, plasma plume imaging, and sound intensity. These were captured by using various laser irradiances, spanning between 1.72 and 6.25 GW cm<small>⁻²</small> for a 266 nm laser. Their distributions were fitted by Gaussian, generalized extreme value (GEV), and Burr distributions, as typical representation models used in LIBS. These were compared using the Kolmogorov–Smirnov (KS) test by its null hypothesis on whether these models are suitable or fail to describe the statistical distribution of the data. The behavior of the data distribution has shown a certain connection to the plasma plume temperature. This was observed for all the used ablation energies. Performances of the statistical models were further compared in the outlier filtering process, where the relative standard deviation of the filtered data was observed. The results presented in this work suggest that an appropriate selection of a statistical model for the data representation can lead to an improvement in the LIBS performance.</p>","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ja/d4ja00126e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}