Spectrochimica Acta Part B: Atomic Spectroscopy最新文献

{"title":"Tantalum-modified graphite furnace as a novel approach for total fluorine determination and indirect PFAS analysis by HR-CS-MAS","authors":"Andrii Tupys ,&nbsp;Jakub Nożykowski ,&nbsp;Barbara Wagner ,&nbsp;Marcin Strawski ,&nbsp;Andrzej Gawor ,&nbsp;Myroslava Petrovska ,&nbsp;Ewa Bulska","doi":"10.1016/j.sab.2025.107347","DOIUrl":"10.1016/j.sab.2025.107347","url":null,"abstract":"<div><div>Fluorine is vital to the environment and biological systems. However, given the limited analytical capabilities of the instrumental techniques currently available, there is a need for the development of novel methodological approaches for its determination. It has recently been demonstrated that there is significant potential in applying high resolution continuum source molecular absorption spectrometry (HR-CS-MAS). In this approach, optimal analytical parameters for fluorine determination can be achieved by monitoring molecular absorption of monofluorides formed in the presence of a mixture of modifiers, in which monofluoride forming elements and stabilizing substances are essential. One potential alternative to the “modifier cocktail” is the use of tantalum foil inserted into the atomizer to cover the graphite surface. However, given the limited thermomechanical strength of the tantalum foil, this study examined the possibility of applying tantalum(V) ethoxide solution to direct the modification of the graphite surface. The objective of this study was to develop a simplified protocol with enhanced analytical parameters for fluorine determination. The morphology and chemical composition of the graphite surface were investigated using surface techniques (TOF-SIMS and LA-ICP-MS). The analytical performance of the proposed approach for fluorine determination was evaluated and compared with previously reported methods. The optimized time-temperature programme was used to determine the fluorine content in groundwater, and the protocol, which had been elaborated, was applied to analyze fluorine in PFAS.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"234 ","pages":"Article 107347"},"PeriodicalIF":3.8,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227393","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":"Determination of ten major and trace elements in coastal placer deposits using composite flux alkali fusion-ICP-MS and analysis of their elemental associations","authors":"Yijun Zhang ,&nbsp;Yiwei Chen ,&nbsp;Yuhang Zhang ,&nbsp;Yan Deng ,&nbsp;Jiahan Wang","doi":"10.1016/j.sab.2025.107345","DOIUrl":"10.1016/j.sab.2025.107345","url":null,"abstract":"<div><div>To address the critical national demand for securing titanium, zirconium, and hafnium resources, an enhanced alkali fusion–ICP-MS analytical method was developed using a lithium metaborate–lithium tetraborate composite flux. This method effectively overcomes the technical challenges posed by the high-salt matrix and refractory minerals commonly found in marine placer deposits from the Hainan coastal region. It enables high-throughput quantification of ten major and trace elements, including Ti, Zr, and Hf, in coastal placer deposits. Validation using certified reference materials across five concentration levels demonstrated excellent accuracy and precision, with relative errors (RE) ≤ 5.5 % and relative standard deviations (RSD) ≤ 5.1 %. The method provides a reliable solution for multi-element batch analysis of complex matrices and offers significant practical value in the assessment and development of marine mineral resources. When applied to the analysis of placer samples from the eastern coastal waters of Hainan Island, the results revealed strong positive correlations among Ti, Zr, and Hf (correlation coefficient <em>r</em> ≥ 0.94), as well as co-enrichment of Mn and V with the major ore-forming elements (<em>r</em> = 0.77–0.85). These findings offer preliminary insights into the metallogenic mechanisms of the region.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"234 ","pages":"Article 107345"},"PeriodicalIF":3.8,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227392","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":"Determination of boron isotopic composition in boron carbide using Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES)","authors":"Manisankar Palai ,&nbsp;S. Maji ,&nbsp;S. Sriram ,&nbsp;Suranjan Bera ,&nbsp;K. Sundararajan","doi":"10.1016/j.sab.2025.107346","DOIUrl":"10.1016/j.sab.2025.107346","url":null,"abstract":"<div><div>In the present work, a simple and novel method has been developed to determine the isotopic composition of boron (¹⁰B/¹¹B) in boron carbide (B₄C) by using Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). Peak intensities of BI atomic line and BII ionic line at 208.96 nm and 345.13 nm, respectively, are used to obtain calibration curves. The intensities of peak maxima of both lines are found to execute excellent linearity (R² &gt; 0.995) with isotopic composition over the range 20–95 % of ¹⁰B. Further, it has been shown that calibration curves obtained from the first derivative of peak maxima are more sensitive compared to the one obtained using peak maxima. Peak shift at 345.13 nm is nearly four times more sensitive than that of 208.96 nm and so calibration plot obtained at 345.13 nm is used for analytical purpose. This method is successfully applied for estimation of isotopic composition in four synthetic mixtures and one boric acid sample. The results are compared with the values obtained by Thermal Ionization Mass Spectrometer (TIMS) and found to have a good agreement between the two techniques. The present ICP-OES method for the determination of boron isotopic composition employed here is proved to be indigenous, economical, rapid and precise.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"234 ","pages":"Article 107346"},"PeriodicalIF":3.8,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227388","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":"Variably weathered ultramafic rocks: Investigation of their mineralogy with SuperCam-like techniques","authors":"C. Collet ,&nbsp;A. Cousin ,&nbsp;O. Beyssac ,&nbsp;P. Beck ,&nbsp;O. Forni ,&nbsp;S. Clegg ,&nbsp;J. Comellas ,&nbsp;E. Clavé ,&nbsp;A. Fau ,&nbsp;S. Pont ,&nbsp;F. Poulet ,&nbsp;R.K. Martinez ,&nbsp;H. Austrheim ,&nbsp;S. Maurice ,&nbsp;R.C. Wiens","doi":"10.1016/j.sab.2025.107338","DOIUrl":"10.1016/j.sab.2025.107338","url":null,"abstract":"<div><div>The NASA Perseverance rover is exploring Jezero crater on Mars since February 2021. Orbital data from Nili Fossae and Jezero crater show a wide diversity of mineralogical signatures including primary mineral like olivine as well as diverse secondary minerals like clays and serpentines and one of the strongest spectral signatures of carbonate on Mars from orbit. This olivine and carbonate-bearing unit is regionally extensive. Most of the studies interpreted the relationship between olivine and carbonate-bearing units as a result of weathering processes involving fluid–rock interactions such as serpentinization and carbonation. Since February 2021, Perseverance has confirmed this large diversity of primary and secondary minerals. The detection of serpentine is of particular interest in order to better constrain the past environment at Jezero crater. Among the science payload, SuperCam is combining three spectral techniques (Laser-Induced Breakdown Spectroscopy - LIBS, Raman, and Visible and near InfraRed - VISIR) that give access to the elemental composition of the targets but also to their mineral and molecular structure. Here, we use terrestrial ultramafic rocks with various degrees of alteration that were well characterized from previous studies, and we analyze them with SuperCam replicate laboratory setups to investigate the sensitivity of SuperCam to detect olivine and secondary phases, in particular serpentines. Distinguishing serpentine from olivine by LIBS is challenging since they have similar chemistry. On the other hand, Raman spectroscopy is able to detect all the phases present in the analyzed samples, when their content is high enough. Finally, the VISIR technique detected the secondary phases while it did not observe easily the olivine. We found that the synergy between these three techniques is of particular importance to differentiate such specific phases, which occur as intricate mixtures down to the sub-micrometer scale in natural targets.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"234 ","pages":"Article 107338"},"PeriodicalIF":3.8,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227389","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":"Assessment of metals and sulfur content in lignocellulosic biomass: developing a simple method for characterizing ash composition by optical emission spectrometry","authors":"Thalyta Fonseca Silva Oliveira ,&nbsp;Lisiane O. Diehl ,&nbsp;Eliana T.F. Larruscain ,&nbsp;Cezar A. Bizzi ,&nbsp;Fabio A. Duarte ,&nbsp;Paola A. Mello","doi":"10.1016/j.sab.2025.107344","DOIUrl":"10.1016/j.sab.2025.107344","url":null,"abstract":"<div><div>Lignocellulosic biomass presents a high potential for biofuel production. Knowledge of its chemical composition is essential to understand the contamination in the final products, and to select appropriate conversion technology. Hence, this study aimed to optimize an alternative analytical protocol for elemental determination in sugarcane straw (SS), sugarcane bagasse (SB), pine wood residue (PWR) and eucalyptus wood residue (EWR). Metals and sulfur were determined by inductively coupled plasma optical emission spectrometry and microwave-induced plasma optical emission spectrometry and optimization of a powerful and greener sample preparation protocol was investigated. The combination of nitric acid (0.5 mL), hydrogen peroxide (0.20 mL), hydrofluoric acid (0.06 mL) and boric acid (0.6 mL) for sample digestion resulted in accurate results (79 to 116%). The developed protocol reduced the reagent volume by up to sixteen times compared to the EN ISO 16967 standard method while maintaining accuracy within the confidence limit (ANOVA, <em>p</em> &lt; 0.05). A certified reference material of sugarcane leaves (CRM Agro C1005a) was analyzed under optimized conditions to evaluate the accuracy of the proposed method. Limits of quantification ranged from 1.00 μg g⁻¹ (Cu) to 1096 μg g⁻¹ (Si) by MIP-OES. Regarding the elemental content, Ba, Cu, and Sr were typically found at lower levels in all samples, at &lt;1 μg g⁻¹ (Cu) whereas Al, Ca, K, and Si reached 0.1 to 0.4% in SS and SB; Ca and K were the main contaminants in PWR and EWR (0.09 to 0.1%).</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"234 ","pages":"Article 107344"},"PeriodicalIF":3.8,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227390","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":"Gold nanoparticle-based colorimetric assay for inorganic selenium speciation analysis in drinking water by solid-phase microextraction mediated dielectric barrier discharge vapor generation","authors":"Shanshan Chen ,&nbsp;Runyan Wang ,&nbsp;Zenghui Zhu ,&nbsp;Xiangyu Kong ,&nbsp;Qian He","doi":"10.1016/j.sab.2025.107343","DOIUrl":"10.1016/j.sab.2025.107343","url":null,"abstract":"<div><div>A sensitive colorimetric assay for the speciation analysis of inorganic Se(IV) and Se(VI) in drinking water samples was proposed in this work. In this assay, solid-phase microextraction with nano-TiO₂ as adsorbent was employed for the selective enrichment of Se(IV) in water with solution pH values ranging from 4 to 7. Then, dielectric barrier discharge induced vapor generation was used to generate volatile H₂Se vapor from Se(IV) adsorbed on nano-TiO₂. Finally, gold nanoparticles (AuNPs) were utilized to induce a color change upon the introduction of H₂Se vapor for Se(IV) determination. The Se(VI) concentration was determined by pre-reduction and subtraction. With this assay, the enrichment and speciation analysis of Se(IV) and Se(VI) in water samples could be realized simultaneously. The experimental parameters that influence the adsorption, vapor generation, and color change were evaluated in greater detail. Under optimal conditions, the relative standard deviation for Se(IV) was 1.1 % at a concentration of 50 μg L⁻¹ and the detection limit for Se(IV) was 0.31 μg L⁻¹ with 50 mL sample volume and 0.16 μg L⁻¹ with 100 mL sample volume by UV–Vis detection. Compared with the AuNPs colorimetric assays with hydride generation and photochemical vapor generation, this assay exhibits a lower detection limit of Se and a greater resistance to interference. With these advantages, this method was proved to be applicable for accurate determination of Se(IV) and Se(VI) in drinking water samples such as purified water samples and Se-enriched natural mineral water samples.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"234 ","pages":"Article 107343"},"PeriodicalIF":3.8,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227391","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":"Numerical simulation of spatial and temporal evolution of laser-induced boron plasma using annular-point double pulse configuration","authors":"Xiaoxi Chen ,&nbsp;Ran Hai ,&nbsp;Yaoxing Wu ,&nbsp;Hongbin Ding","doi":"10.1016/j.sab.2025.107341","DOIUrl":"10.1016/j.sab.2025.107341","url":null,"abstract":"<div><div>The annular–point double pulse laser-induced breakdown spectroscopy (DP-LIBS) is an effective way of significantly enhancing plasma parameters to amplify the spectral emission intensity for analysis of co-deposition layers in fusion devices. A two-dimensional numerical model, describing laser–material interaction, vapor plume expansion, plasma formation and laser–plasma interaction at a pressure of 10⁻⁴ mbar, was applied to investigate spatial and temporal evolutions of laser-induced boron plasma using annular–point double pulse configuration, which is crucial for analytical capabilities of LIBS techniques. The annular-point double pulse configuration demonstrated significant enhancement in plasma temperature compared to conventional single pulse configuration, under the same laser energy and laser fluence. At a laser fluence of 18 J/cm², we examined a series of inter-pulse delay times and found that the 20 ns delay time exhibited optimal performance, maintaining electron temperatures exceeding 2.5 eV for extended periods after the second pulse. Quantitatively, this optimal configuration achieved electron temperatures approximately 1.7–2.2 times as high as those in single-pulse configuration and maintained electron densities in the 10¹⁶–10¹⁷ cm⁻³ range. The temperature enhancement resulted from the collision between the annular pre-pulse plasma and the subsequent point pulse plasma, forming a well-defined stagnation layer.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"234 ","pages":"Article 107341"},"PeriodicalIF":3.8,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227387","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":"3D microanalysis of iron segregation based on picosecond laser-induced breakdown spectroscopy imaging","authors":"Shoujie Li ,&nbsp;Zixiong Qin ,&nbsp;Jingjun Lin ,&nbsp;Lihui Ren ,&nbsp;Yuan Lu ,&nbsp;Zhenzhen Wang ,&nbsp;Ronger Zheng ,&nbsp;Yoshihiro Deguchi","doi":"10.1016/j.sab.2025.107340","DOIUrl":"10.1016/j.sab.2025.107340","url":null,"abstract":"<div><div>The elemental microanalysis plays a crucial role in gray cast iron quality control, and segregation monitoring is an essential step in this analysis. In this study, we developed a three-dimensional laser-induced breakdown spectroscopy (3D LIBS) system for examining gray cast iron using a 9 ps-pulsed laser operating at 355 nm. 2 μm high spatial-resolved measurements were successfully achieved to determine the 3D segregation of Copper (Cu), and Manganese (Mn). In terms of experimental methodology, this study has overcome the limitations of traditional three-dimensional imaging techniques by abandoning conventional approaches that rely on physical sectioning to acquire depth information. Instead, it adopts a more efficient and non-destructive strategy: performing mapping ablation cleaning under laser defocusing conditions to eliminate interference from surface impurities or previously analyzed regions, followed by 3D LIBS imaging implementation with precisely focused laser beams. Through the ablation theory formulas, the axial ablation depth under laser irradiation was precisely calculated as 2 μm, thereby obtaining a total of 12 layers of depth-resolved data while maintaining stable and reliable signal-to-noise ratios (SNR) for each layer. The microscale 3D LIBS analytical technique provides a powerful tool for understanding the distribution patterns of various segregated elements in gray cast iron materials. Therefore, 3D LIBS has been demonstrated as an effective technology for addressing elemental segregation and can serve as an alternative methodology for gray cast iron quality inspection.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"234 ","pages":"Article 107340"},"PeriodicalIF":3.8,"publicationDate":"2025-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145158212","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":"Experimental Stark widths and shifts of Nb II spectral lines","authors":"J. Manrique ,&nbsp;D.M. Díaz Pace ,&nbsp;J.A. Aguilera ,&nbsp;C. Aragón","doi":"10.1016/j.sab.2025.107337","DOIUrl":"10.1016/j.sab.2025.107337","url":null,"abstract":"<div><div>Stark widths and shifts of Nb II spectral lines have been measured by laser-induced breakdown spectroscopy (LIBS). The experimental line profiles are obtained from spectra of the emission of laser-induced plasmas generated with samples prepared by borate fusion with small niobium concentrations, selected to minimize self-absorption. Using different time delays in the detection of the emission, electron densities ranging from 0.81 × 10¹⁷ cm⁻³ to 6.7 × 10¹⁷ cm⁻³ and temperatures in the interval 10,100–16,700 K are employed in each measurement. The 26 Stark widths and 22 Stark shifts determined include spectral lines from transitions between 10 multiplets and 3 configurations. To our knowledge, only two experimental data for Nb II Stark widths were available previously in the literature.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"234 ","pages":"Article 107337"},"PeriodicalIF":3.8,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145061131","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 detection of total chromium in water bodies using AuAgPd trimetallic nanoparticles-modified filter paper combined with laser-induced breakdown spectroscopy","authors":"Guangchun Luo ,&nbsp;Chunjiang Zhao ,&nbsp;Shixiang Ma ,&nbsp;Hongwu Tian ,&nbsp;Fengjing Cao ,&nbsp;Daming Dong","doi":"10.1016/j.sab.2025.107336","DOIUrl":"10.1016/j.sab.2025.107336","url":null,"abstract":"<div><div>Heavy metal contamination in water bodies poses a severe threat to ecosystems and human health, thereby necessitating the development of rapid and highly sensitive detection methods. Traditional laboratory detection techniques are limited in their widespread application due to expensive equipment and complex operational procedures. To address this issue, we developed a rapid detection technique based on AuAgPd trimetallic nanoparticles(TNPs)-modified filter paper combined with laser-induced breakdown spectroscopy (LIBS) for the determination of total chromium (Cr) in water. AuAgPdTNPs-modified filter paper efficiently enriches Cr of different valence states, while LIBS quantifies total Cr from its characteristic emission lines. Experimental results demonstrate that the limit of detection (LOD) of total Cr is 0.21 μg/L (4 nM), showing good linearity in the ranges of 0–50 μg/L and 50–1000 μg/L. In tests with actual water samples, the method showed high reliability, with recovery rates ranging from 95.24 % to 106.15 %. This technology provides a novel solution for the rapid detection of heavy metal pollution in water bodies and holds broad application prospects.</div></div>","PeriodicalId":21890,"journal":{"name":"Spectrochimica Acta Part B: Atomic Spectroscopy","volume":"234 ","pages":"Article 107336"},"PeriodicalIF":3.8,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106464","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}