Journal of Analytical Atomic Spectrometry最新文献

{"title":"Standardization of microwave-assisted extraction procedures for characterizing non-labile metallic nanoparticles in environmental solid samples by means of single particle ICP-MS","authors":"Carlos Gómez-Pertusa, M. Carmen García-Poyo, Guillermo Grindlay, Ricardo Pedraza, M. Adela Yañez, Luis Gras","doi":"10.1039/d4ja00123k","DOIUrl":"https://doi.org/10.1039/d4ja00123k","url":null,"abstract":"Microwave-assisted extraction (MAE) treatments seem to be a promising sample preparation strategy to isolate nanomaterials (NMs) from environmental samples prior to single particle inductively coupled plasma mass (spICP-MS) determination. Nevertheless, because previous studies make use of domestic microwave ovens (DMOs), several shortcomings arise that compromise the analysis such as lack of control of experimental variables, limited operating conditions, and uncontrolled sample heating leading to irreproducibility issues. The goal of this work is to adapt previously developed MAE treatments for soil and air filters with the DMO apparatus to state-of-the-art scientific microwave ovens (SMOs) in order to standardize current analytical protocols for NM characterization. Results show that, by working with an SMO, non-labile metallic NMs (Pt-AuNPs) are quantitively extracted from soil and air filter samples unaltered in 10 min and 6 min, respectively, at 1200 W by using 10 mL of NaOH 0.1 M solution. The use of a SMO system allows improving accuracy (above 10% of the particle recovery), precision (above 5% of the RSD) and sample throughput (above 4-fold) when compared to the DMO ones. According to these findings, MAE seems to be a powerful strategy for routine analysis of non-labile NMs in environmental samples.","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141255957","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":"Correction: Development of a multi-isotopic (Pb, Fe, Cu) analytical protocol in gold matrices for ancient coin provenance studies","authors":"Louise de Palaminy, Franck Poitrasson, Sandrine Baron, Maryse Blet-Lemarquand, Loïc Perrière","doi":"10.1039/d4ja90024c","DOIUrl":"https://doi.org/10.1039/d4ja90024c","url":null,"abstract":"Correction for ‘Development of a multi-isotopic (Pb, Fe, Cu) analytical protocol in gold matrices for ancient coin provenance studies’ by Louise de Palaminy <em>et al.</em>, <em>J. Anal. At. Spectrom.</em>, 2024, https://doi.org/10.1039/d3ja00312d.","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141255792","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 performance improvement using beam shaping plasma modulation for uranium detection in di-uranate using laser-induced breakdown spectroscopy","authors":"Jianxun Ji, Zongyu Hou, Weiran Song, Xiang Yu, Zhe Wang","doi":"10.1039/d4ja00086b","DOIUrl":"https://doi.org/10.1039/d4ja00086b","url":null,"abstract":"Di-uranate is the most important uranium hydrometallurgical product in uranium mining and metallurgy. It is an important raw material in the nuclear industry. Rapid and accurate determination of its uranium content is of great significance for product trading and production process control. At present, it mainly relies on traditional methods, namely ferrous sulfate reduction/potassium dichromate oxidation titration, which involves a complex operation process and lengthy analysis time. Laser induced breakdown spectroscopy (LIBS) is a spectroscopic technique based on atomic emission, which has been proven to be very effective in rapid detection of other elements. However, there are still problems such as severe spectral interference and poor quantitative results of the uranium element. This work explored the feasibility of beam shaping modulation technology in improving the spectral interference level of di-uranate samples, and compared the quantitative performance of uranium between the Gaussian beam and flat-top beam. It was found that, compared to the Gaussian beam, the signal intensity of the flat-top beam has been enhanced, and the degree of spectral interference, signal uncertainty, and quantitative performance have also been improved. The signal strength has increased by 1–2 times, and the signal uncertainty has decreased by about 30%. Spectral peaks with severe overlap can be clearly identified, such as Fe I 480.77 nm and U I 481.09 nm. The determination coefficient (<em>R</em><small>²</small>), root mean square error (RMSE), and relative standard deviation (RSD) of the quantitative model have been improved from 0.9787, 1.4027, and 1.88% of the Gaussian beam to 0.9857, 0.4828, and 1.48% of the flat-top beam. Besides, by calculating the plasma parameters, it was also found that the difference in plasma parameters between samples of the flat-top beam also decreases, which may be an important reason why beam shaping technology can improve quantitative performance. The results based on flat-top beam LIBS provide a basis for online measurement of uranium in di-uranate samples.","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141255781","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 depth profile analysis using short single pulse responses in LA-ICP-Q-MS experiments","authors":"Maximilian Podsednik, Florian Fahrnberger, David Ken Gibbs, Birgit Achleitner, Silvia Larisegger, Michael Nelhiebel, Herbert Hutter, Andreas Limbeck","doi":"10.1039/d4ja00082j","DOIUrl":"https://doi.org/10.1039/d4ja00082j","url":null,"abstract":"The demand for high-resolution imaging, and high sample throughputs in LA-ICP-MS experiments has led to developing rapid-response ablation cells with low dispersion. These cells can achieve short transient signals called single pulse responses (SPRs), whose width is in the single-digit millisecond range at 1% of the maximum. However, coupled with ICP-Q-MS, recording those short signals poses a problem due to the sequential measurement of selected m/z ratios. If more than one m/z ratio is targeted, the time resolution of quadrupole detection systems is insufficient for accurately determining short SPRs. This work focuses on utilizing rapid response ablation cells for the analysis of multiple elements with quadrupole-based detection systems in the SPR mode. To achieve this, an ArF-excimer laser equipped with a rapid-response ablation chamber is coupled to an ICP-MS with a short settling time of 0.2 ms and below. The two naturally occurring Ag-isotopes were analyzed in the NIST SRM 612 to optimize the dwell times for ideal data acquisition. The data shows that the ratio of the dwell time and the settling time, plays a crucial role. With the optimized parameters, the natural ratio of 107Ag and 109Ag within a 10 ms FW0.01M transient signal could be determined. This concept of LA-ICP-MS was then applied for depth profiling analysis of Al-doped SiC, a wide bandgap semiconductor. This procedure acquired depth profiles on 30 different sample locations in approximately 2 minutes with an exceptional depth resolution of 55 nm.","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141255783","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":"Atomic spectrometry update: review of advances in elemental speciation","authors":"Robert Clough, Chris F. Harrington, Steve J. Hill, Yolanda Madrid, Julian F. Tyson","doi":"10.1039/d4ja90029d","DOIUrl":"https://doi.org/10.1039/d4ja90029d","url":null,"abstract":"This is the 16th Atomic Spectrometry Update (ASU) to focus on advances in elemental speciation and covers a period of approximately 12 months from January 2023. This ASU review deals with all aspects of the analytical atomic spectrometry speciation methods developed for: the determination of oxidation states; organometallic compounds; coordination compounds; metal and heteroatom-containing biomolecules, including metalloproteins, proteins, peptides and amino acids; and the use of metal-tagging to facilitate detection <em>via</em> atomic spectrometry. As with all ASU reviews the focus of the research reviewed includes those methods that incorporate atomic spectrometry as the measurement technique. However, because speciation analysis is inherently focused on the relationship between the metal(loid) atom and the organic moiety it is bound to, or incorporated within, atomic spectrometry alone cannot be the sole analytical approach of interest. For this reason, molecular detection techniques are also included where they have provided a complementary approach to speciation analysis. The number of publications covered this year has increased since last year but remains relatively low compared to many of the years that this ASU has been published for. However, there is a good breadth of elements covered, over 20 this year, with the most popular elements still being As, Hg and Se whilst Ge and Tc both make their first appearances this year. Another item to note is the <warning>decreasing quality of the abstract</warning> for many of the papers, with detail on the methodology, key results with data included, conclusions and implications thereof missing. This is likely to lead to fewer researchers reading the article.","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141255794","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":"Emission and stability improvement of AlO molecular bands in NELIBS using laser pretreatment","authors":"Qiuyun Wang, Fangjian Zhang, Xueyan Han, Xun Gao, Weijun Chen, Kewei Huan, Ya Liu, Ying Cui, Wei Liang, Anmin Chen","doi":"10.1039/d4ja00102h","DOIUrl":"https://doi.org/10.1039/d4ja00102h","url":null,"abstract":"In this paper, the fiber laser marking machine was used to pretreat Al plate, and then Au nanoparticle (Au NPs) solution was dripped on the surface of pre-treated plate to study the effect of laser pretreatment assisted-nanoparticle-enhanced laser-induced breakdown spectroscopy technique on emission and stability of the AlO molecular bands (B2Σ+ - X2Σ, Δν = 0) in Al plasma. The results showed that laser pretreatment significantly improved emission and stability of the AlO molecular bands. Additionally, the vibration temperature of AlO molecular bands was calculated, revealing a significant enhancement in the vibration temperature due to laser pretreatment. Therefore, this paper demonstrates the potential of laser pretreatment in improving analytical sensitivity in LIBS.","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141197688","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":"Accurate determination of stable silver isotopes in zinc-rich samples by effective separation of silver and zinc","authors":"Haotian Gong, Youqiang Qi, Ting-guang Lan, Haifeng Fan, Youwei Chen, Ting Zhou, Ruizhong Hu","doi":"10.1039/d4ja00125g","DOIUrl":"https://doi.org/10.1039/d4ja00125g","url":null,"abstract":"Silver isotopes have been extensively used in environment, archaeology, and economic geology. Nevertheless, accurate analyses of Ag isotope ratios face challenges caused by presence of matrix elements (e.g. Zn, Cu, and Pb) in most sulfide samples due to isobaric interferences during multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS) routines. Most ff these elements, such as Cu, and Pb, can be effectively removed after the first column through the tandem column setup. However, the complete removal of Zn from Ag remains a significant unresolved issue, particularly given their common coexistence in sulfide minerals. Combining the previous studies and chemical principle of ion exchange resin, we optimized a two-stage ion exchange procedure by meticulously adjusting solution volumes and column separation process. A condensed Zn-doped NIST SRM 978a (silver international standard reference material) was tested for AG50W-X8 resin following our modified procedure, with a result of distinct elution curves of Ag and Zn. Subsequently, three sphalerite samples were selected for the optimized two-stage ion exchange procedure, and ICP-MS results of silver elution fractions also demonstrated complete separation of Ag and Zn. The whole procedure achieved an Ag yield exceeding 98.1 ± 2.3% (2SD, n=4). NIST SRM 978a and IAEA-S-1 (an in-house standard) were tested for long-term reproducibility with -0.001 ± 0.030 ‰ (2SD, n = 25) and 0.054 ± 0.023‰ (2SD, n = 22) of δ109Ag respectively, indicating the high accuracy in MC-ICPMS routines. Zn-doped NIST SRM 978a and sphalerite samples were further subjected to the modified procedure, and they have values of 0.004 ± 0.014‰ (2SD, n = 3) and -0.214 ± 0.033‰ (2SD, n = 12) for δ109Ag respectively. Moreover, we selected eight sphalerite samples from several hypogene deposits in China and obtained δ109Ag values from -0.229‰ to 2.227‰, indicating the significant Ag isotopic fractionation between Ag-bearing and Zn-rich minerals in hypogene deposits. In conclusion, this study shows the feasibility of accurately measuring Ag isotopes in Zn-rich samples, and reveals their application potential in related Ag-bearing and Zn-rich deposits. Key words: silver isotopes, Zinc-rich samples, MC-ICPMS, matrix element, Zinc deposits","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141197604","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":"Isotopic ratio analysis of individual sub-micron particles via spICP-TOFMS","authors":"Sarah Ellen Szakas, Alexander Gundlach-Graham","doi":"10.1039/d4ja00121d","DOIUrl":"https://doi.org/10.1039/d4ja00121d","url":null,"abstract":"We investigate the use of single particle inductively coupled plasma time-of-flight mass spectrometry (spICP-TOFMS) to measure isotopic ratios within individual sub-micron particles and explore the advantages and limitations of this method. Through the analysis of samarium (Sm) isotopes—<small>¹⁴⁷</small>Sm and <small>¹⁴⁹</small>Sm—in individual monazite particles, and lead (Pb) isotopes – <small>²⁰⁶</small>Pb and <small>²⁰⁸</small>Pb – in individual galena particles, we demonstrate that isotope ratios recorded by spICP-TOFMS have precision controlled by Poisson statistics. This precision depends on the signal amount measured per isotope from an individual particle: as particle size increases, more counts of each isotope are detected, and the precision improves. In monazite particles with mass amounts of Sm from 40 ag to 4 fg, isotope-ratio precision (relative standard deviation, RSD) ranged from 43% to 5%. However, the average isotope ratio from a particle population is still accurate; the molar ratio determined for <small>¹⁴⁹</small>Sm/<small>¹⁴⁷</small>Sm was 0.912, which is within 1% of the expected ratio. Lead isotopic composition varies widely in nature because <small>²⁰⁶</small>Pb, <small>²⁰⁷</small>Pb, and <small>²⁰⁸</small>Pb are radiogenic isotopes that decay from thorium (Th) and uranium (U). In the analysis of lead isotopes from galena particles, we found that the RSD for <small>²⁰⁸</small>Pb/<small>²⁰⁶</small>Pb ratio ranged from 32% to 2% for particles with 1.4 fg to 80 fg of Pb. We further explore the use of spICP-TOFMS for radiometric dating of monazite particles. Monazite is used in geochronology for radiometric dating based on <small>²⁰⁸</small>Pb/<small>²³²</small>Th and <small>²⁰⁶</small>Pb/<small>²³⁸</small>U ratios. spICP-TOFMS analyses of individual monazite particles containing only 0.02–80 fg of Th and 0.03 - 30 fg of U showed radiogenic Pb-isotope signatures and a median age of 550 Ma. We also show that the spread of ages from monazite particles is broader than explainable by Poisson statistics, revealing real variation in age or depletion/enrichment of Pb, Th, and/or U in the particles. Overall, we demonstrate that spICP-TOFMS can be used for accurate isotope-ratio analysis with precision down to a few percent; however, understanding measurement noise is critical to define the significance of isotope ratios measured from individual particles.","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141197598","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":"NIRS-XRF Fusion Spectroscopy for Coal Calorific Value Prediction Using Data Deficient Learning","authors":"Xianjing Jie, Aiyong Yang, Qingru Cui, Baobei Xu, Yilu Guo, Shiliang Pu","doi":"10.1039/d4ja00091a","DOIUrl":"https://doi.org/10.1039/d4ja00091a","url":null,"abstract":"Accurate and timely prediction of the coal calorific value holds immense significance in ensuring efficient and effective utilization of energy resources. In this manuscript, a novel analyzer for the rapid and precise determination of coal calorific value is developed by integrating near-infrared spectroscopy (NIRS) with X-ray fluorescence spectroscopy (XRF). Previous studies primarily rely on traditional linear regression methods to establish the mapping between NIRS-XRF fusion spectroscopy and the calorific value of coal, given the predominance of a linear relationship between the two. However traditional linear regression analysis methods fail to predict accurate calorific value of coal, because of non-linear system biases and other non-linear issues exist in real applications. Due to the limited open-source dataset and the difficulties of labeled data collection, few of approaches utilize the non-linear neural networks to predict the calorific value of coal due to the risk of over-fitting. Improving the performance with such a small training set is crucial for the adjustment of the NIRS-XRF analyzer system. In this manuscript, we propose a novel approach named PLS-Assisted Neural Fine-Tuning, which consists of two stages: a PLS pre-training stage and a fine-tuning stage. The PLS pre-training stage employs data augmentation to generate simulated inputs with pseudo label obtained by PLS. These synthesis samples are used to transfer the linear priori into neural networks from PLS for eliminating the risk of over-fitting issue. The proposed PLS-Assisted Neural Fine-Tuning method combines the linear priori and the advantages of neural network to outperform conventional machine learning methods and the vanilla neural networks. rewrite{We perform comprehensive experiments to validate effectiveness of PLS-Assisted Neural Fine-Tuning method. Notably, the proposed PLS-Assisted Neural Fine-Tuning approach improves the performance without bells and whistles in data deficient scenes, and especially brings significant improvements within 50 training samples. Furthermore, compared to the widely used PLS algorithm, our algorithm demonstrates superior robustness across data with varying crushing particle sizes.","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141168761","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":"Improvement in the sensitivity of LA-ICP-MS bioimaging by addition of nitrogen to the argon carrier gas","authors":"Monique G. Mello, Thomas E. Lockwood, Jonathan Wanagat, Mika T. Westerhausen, David P. Bishop","doi":"10.1039/d3ja00467h","DOIUrl":"https://doi.org/10.1039/d3ja00467h","url":null,"abstract":"Elemental bioimaging of low abundant elements <em>via</em> laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) is hampered by a lack of sensitivity. Novel solutions for specific applications have been developed, however there is a need for more universal approaches. Here we investigated the addition of N<small>₂</small> to the ICP carrier gas to increase sensitivity, defined as signal-to-background, for the majority of biologically relevant elements. A gelatine standard that contained 38 elements across the mass range was ablated with increasing amounts of N<small>₂</small> added to the carrier gas post-ablation. The results show that while all elements examined had an increase in signal intensity, some elements did not have a resultant increase in signal-to-background. Sc, V, Mn, Fe, and Se exhibited reductions in signal-to-background ratios across all N<small>₂</small> flow rates examined, with the remaining elements experiencing signal-to-background increases from 1.2–7.8×, depending on the N<small>₂</small> flow rate and element. An optimum N<small>₂</small> flow rate was determined for the analysis of all elements, and used to image endogenous elements in a mouse brain, and antibody-conjugated elements in a quadriceps muscle section. These images confirmed that the addition of N<small>₂</small> to the carrier gas increased the signal-to-background of the analysis, improving image resolution for endogenous elements and low abundant analytes used for immuno-mass spectrometry imaging of biomarkers. These findings offer a promising avenue for advancing the capabilities of LA-ICP-MS in bio-imaging applications.","PeriodicalId":81,"journal":{"name":"Journal of Analytical Atomic Spectrometry","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141169104","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}