Atomic Spectroscopy最新文献_第9页

Scanning Transmission X-Ray Microscopy At The Canadian Light Source: Progress And Selected Applications In Geosciences 扫描透射x射线显微镜在加拿大光源:进展和选定的应用在地球科学

IF 3.4 2区化学

Atomic Spectroscopy Pub Date : 2022-01-29 DOI: 10.46770/as.2022.008

Jian Wang, Jinhui Li

{"title":"Scanning Transmission X-Ray Microscopy At The Canadian Light Source: Progress And Selected Applications In Geosciences","authors":"Jian Wang, Jinhui Li","doi":"10.46770/as.2022.008","DOIUrl":"https://doi.org/10.46770/as.2022.008","url":null,"abstract":": Synchrotron-based scanning transmission X-ray microscopy (STXM) efficiently integrates X-ray microscopy and X-ray absorption spectroscopy (XAS) to provide quantitative, chemically specific imaging of elements, functional groups, bonding, and oxidation states in 2D and 3D modes at high spatial resolution (sub-10 to 30 nm), high energy resolution, and low radiation doses. STXM has been increasingly used to study various materials and samples for life, earth, planetary, and environmental sciences. In this progress report and minireview, the STXM principle and instrumentation of conventional STXM and the latest STXM-ptychography at the Canadian Light Source are first discussed. Then, two representative applications of STXM on geoscience-related samples, including magnetotactic bacteria, soil microaggregates, and related systems, are presented to illustrate the strong capabilities and suitability of STXM to elucidate complex systems, processes, and associations in the natural sciences. Finally, the potential applications and prospects of the STXM-related techniques in characterizing precious extraterrestrial samples ( e.g. , lunar samples returned by China’s Chang’e-5 mission) are briefly discussed.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2022-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44922256","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}

引用次数: 4

Atomic Spectroscopy 原子光谱法

IF 3.4 2区化学

Atomic Spectroscopy Pub Date : 2022-01-29 DOI: 10.46770/as.2022.006

Xiaohua Xia

引用次数: 0

In Situ Investigation Of The Valence States Of Iron-Bearing Phases In Chang’E-5 Lunar Soil Using FIB, AES, And TEM-EELS Techniques 利用FIB、AES和TEM-EELS技术原位研究嫦娥五号月球土壤中含铁相的价态

IF 3.4 2区化学

Atomic Spectroscopy Pub Date : 2022-01-29 DOI: 10.46770/as.2022.002

Yang Li

{"title":"In Situ Investigation Of The Valence States Of Iron-Bearing Phases In Chang’E-5 Lunar Soil Using FIB, AES, And TEM-EELS Techniques","authors":"Yang Li","doi":"10.46770/as.2022.002","DOIUrl":"https://doi.org/10.46770/as.2022.002","url":null,"abstract":": Nanophase iron (np-Fe 0 ) is a major product of space weathering and its presence significantly alters the reflectance spectral characteristics of lunar soil. Previous studies have established that the np-Fe 0 particles originate from the reduction of ferrous ions in the plasma, in-situ decomposition of olivine and pyroxene, and disproportionation of ferrous ions in solid ferrosilicates. In this study, sample charging effects were eliminated and in situ nanoscale valence state analysis of iron-bearing phases in Chang’E-5 lunar soil was conducted by combining focused ion beam (FIB) microscopy, Auger electron spectroscopy (AES), and transmission electron microscopy-electron energy loss spectroscopy (TEM-EELS) techniques. The results indicate that the contents and valence states of iron in the np-Fe 0 particles, amorphous matrix, and ferrosilicates differ. The np-Fe 0 particles were found to be composed of pure metallic iron, whereas ferrous and ferric iron ions were present in olivine crystals and the amorphous matrix, respectively. The discovery of both metallic and ferric iron in the amorphous matrix of Chang’E-5 lunar soil offers new insights regarding the disproportionation reaction of Fe 2+ on the lunar surface. This study demonstrates that the combination of FIB, AES, and TEM-EELS is an effective and precise approach for analyzing the valence states of iron-bearing phases in lunar soil, which can be extended to other extraterrestrial samples and other multivalent elements.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2022-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48620449","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}

引用次数: 8

Electron Probe Microanalysis In Geosciences: Analytical Procedures And Recent Advances 地球科学中的电子探针微分析:分析方法和最新进展

IF 3.4 2区化学

Atomic Spectroscopy Pub Date : 2022-01-25 DOI: 10.46770/as.2021.912

Shuiyuan Yang

引用次数: 12

High-Precision Measurement Of Trace Level Na, K, P, S, Cr, And Ni In Lunar Glass Using Electron Probe Microanalysis 用电子探针微量分析高精度测量月球玻璃中微量Na、K、P、S、Cr和Ni

IF 3.4 2区化学

Atomic Spectroscopy Pub Date : 2022-01-25 DOI: 10.46770/as.2022.001

Yi Chen

{"title":"High-Precision Measurement Of Trace Level Na, K, P, S, Cr, And Ni In Lunar Glass Using Electron Probe Microanalysis","authors":"Yi Chen","doi":"10.46770/as.2022.001","DOIUrl":"https://doi.org/10.46770/as.2022.001","url":null,"abstract":": Lunar glass can provide critical information on the genesis of lunar rocks and the evolution of the Moon's interior. Several minor and trace elements in lunar glass, such as Na, K, P, S, Cr, and Ni, can be measured by electron probe microanalysis (EPMA) and are informative for understanding glass type, impact volatilization, and magmatic evolution processes. However, the analytical accuracy and precision of these trace-level elements in glass can be impeded by beam sensitivity, peak shift of X-ray and secondary fluorescence effects. Using EPMA, we constructed an optimized analytical method with high accuracy and precision to analyze trace elements simultaneously with major elements in lunar glass. The method was developed using the CAMECA SXFive EPMA at the Institute of Geology and Geophysics, Chinese Academy of Sciences (IGGCAS). The optimal analytical conditions for Na, K, P, S, Cr, and Ni in lunar glass were as follows: 20 kV accelerating voltage, 100 nA beam current, 10 μm beam diameter, linear background mode, using large-area analytical crystals and aggregate counting strategy and a 10-min total counting time. Replicate analyses on basalt and komatiite glass standards show that the analytical results are consistent with the reference values. Variations in the levels of the analyzed trace elements fall within ± 10%. The detection limits (3σ) for Na, K, P, S, Cr, and Ni can be lowered to 17-96 ppm. Our method can prohibit sample damage of lunar glass even after a 10-min analysis time. Therefore, this optimized method can provide precise trace and major element analysis of lunar glass and help to trace its origin.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2022-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44493930","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}

引用次数: 2

Elemental Probe-Based CRISPR/Cas12a Biosensing For Sensitive Tobramycin Detection 基于元素探针的CRISPR/Cas12a生物传感技术对妥布霉素的敏感性检测

IF 3.4 2区化学

Atomic Spectroscopy Pub Date : 2022-01-25 DOI: 10.46770/as.2021.1013

R. Liu

引用次数: 2

A Highly Efficient Method For The Accurate And Precise Determination Of Zinc Isotopic Ratios In Zinc-Rich Minerals Using MC-ICP-MS MC-ICP-MS测定富锌矿物中锌同位素比值的高效方法

IF 3.4 2区化学

Atomic Spectroscopy Pub Date : 2021-12-10 DOI: 10.46770/as.2021.910

Honglin Yuan

{"title":"A Highly Efficient Method For The Accurate And Precise Determination Of Zinc Isotopic Ratios In Zinc-Rich Minerals Using MC-ICP-MS","authors":"Honglin Yuan","doi":"10.46770/as.2021.910","DOIUrl":"https://doi.org/10.46770/as.2021.910","url":null,"abstract":"This study proposes a highly efficient method for the direct determination of Zn isotopes in Zn-rich minerals, without the use of column chromatography, via multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). Experiments (with or without column chromatography) were performed to evaluate the feasibility of directly obtaining non-deviated Zn isotopic ratios by MC-ICP-MS. For Zn isotopes determined without the use of column chromatography, the instrumental mass bias was corrected using the standard sample bracketing with Cu as the internal standard. The effects of acidity and concentration mismatch and the matrix effect were strictly assessed in a wet-plasma mode. The Long-term reproducibilities of δZn and δZn better than ± 0.03‰ (n = 42, 2 standard deviations (2s)) and ± 0.05‰ (n = 42, 2s), respectively, were achieved by repeatedly measuring the NIST Standard Reference Materials (SRM) 682 solution doped with trace matrix elements over four months. Zn-rich minerals determined without employing column chromatography displayed little drift in δZn and δZn values compared with minerals determined using column chromatography, with ΔZnwithout−with (ΔZnwithout-with = δZnwithout δZnwith) ranging from -0.04 to +0.01‰ and ΔZnwithout−with ranging from -0.06 to +0.01‰. These results suggest that non-deviated Zn isotopic ratios in Zn-rich minerals can be achieved without column chromatography due to the low contents of undesired matrix elements.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43565462","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}

引用次数: 1

Continuous Online Leaching System Coupled With Inductively Coupled Plasma Mass Spectrometry For Assessment Of Cr, As, Cd, Sb, And Pb In Soils 连续在线浸出系统耦合电感耦合等离子体质谱法评估土壤中Cr、As、Cd、Sb和Pb

IF 3.4 2区化学

Atomic Spectroscopy Pub Date : 2021-12-10 DOI: 10.46770/as.2021.827

D. Beauchemin

{"title":"Continuous Online Leaching System Coupled With Inductively Coupled Plasma Mass Spectrometry For Assessment Of Cr, As, Cd, Sb, And Pb In Soils","authors":"D. Beauchemin","doi":"10.46770/as.2021.827","DOIUrl":"https://doi.org/10.46770/as.2021.827","url":null,"abstract":"Incidental ingestion of soil containing Cr, As, Cd, Sb, and Pb has been attracting global attention as it can significantly impact human health. Many bioaccessibility methods have been developed to simulate the amount of contaminants extracted by gastrointestinal fluids following incidental ingestion. Although the continuous online leaching method (COLM) offers various advantages over conventional batch bioaccessibility methods, such as reduced analysis time, elemental source apportionment, and isotopic analysis, it has not yet been applied to soil and directly compared to validated, published methods. This study uses the COLM with simulated gastrointestinal fluids from the United States Environmental Protection Agency (US EPA), United States Pharmacopeia (USP), and unified bioaccessibility method (UBM) to measure the bioaccessibility of Cr, As, Cd, Sb, and Pb in NIST 2710, NIST 2710a, NIST 2711a, and BGS 102. When the US EPA gastrointestinal fluid was used, no significant difference was observed between the COLM bioaccessible + residual, aqua regia extraction, or certificate concentrations for all the elements and soils studied. Furthermore, COLM bioaccessibility was within the acceptable range of control limits and bioavailability (animal) studies for most reference materials. In addition, no statistically significant difference was observed between either the US EPA batch method or the stomach phase of the UBM batch method and the stomach stage of the COLM, indicating that the COLM could be incorporated into current bioaccessibility analyses to improve soil contamination characterization in the future.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44086411","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}

引用次数: 3

Simultaneous Or Sequential Multi-Element Graphite Furnace Atomic Absorption Spectrometry Techniques: Advances Within The Last 20 Years 同步或顺序多元素石墨炉原子吸收光谱技术:近20年来的进展

IF 3.4 2区化学

Atomic Spectroscopy Pub Date : 2021-10-01 DOI: 10.46770/as.2021.707

N. Thomaidis

{"title":"Simultaneous Or Sequential Multi-Element Graphite Furnace Atomic Absorption Spectrometry Techniques: Advances Within The Last 20 Years","authors":"N. Thomaidis","doi":"10.46770/as.2021.707","DOIUrl":"https://doi.org/10.46770/as.2021.707","url":null,"abstract":"Electrothermal or graphite furnace atomic absorption spectrometry (ETAAS or GFAAS) is one of the most widely used techniques for determining elements in different matrices (e.g., foodstuffs, pharmaceuticals, biological specimens, nanomaterials, polymers, fuels and environmental media). Numerous elements can be simply and quickly determined with high precision and accuracy, low detection limits, and at moderate cost. The technique is also suitable for direct solid and slurry sample analysis. A crucial feature of this technique is that it can perform simultaneous or sequential multi-element analysis. Over the years, many instruments have come on the market for multi-elemental analysis using mostly line source (LS) GFAAS and high-resolution continuum source (HR-CS) GFAAS. This review covers publications from 2000 to 2020related to the simultaneous or sequential multi-elemental analysis by LS-GFAAS and HR-CS-GFAAS. Mainly the applications, the limits of detection, the use of internal standardization and other aspects regarding the matrix, pyrolysis and atomization temperatures and modifiers are discussed. Finally, a critical comparison is made between the LS-GFAAS and HR-CS-GFAAS techniques.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44559838","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}

引用次数: 4

Determination Of Silver In Geological Samples Using Aerosol Dilution ICP-MS After Water-Bath Extraction With Inverse Aqua Regia 反相水浴萃取-气溶胶稀释ICP-MS法测定地质样品中的银

IF 3.4 2区化学

Atomic Spectroscopy Pub Date : 2021-10-01 DOI: 10.46770/as.2021.906

Yan Wu

{"title":"Determination Of Silver In Geological Samples Using Aerosol Dilution ICP-MS After Water-Bath Extraction With Inverse Aqua Regia","authors":"Yan Wu","doi":"10.46770/as.2021.906","DOIUrl":"https://doi.org/10.46770/as.2021.906","url":null,"abstract":"A valid method for trace silver (Ag) detection in geological samples was developed in this study using aerosol dilution inductively coupled plasma-mass spectrometry after extraction with inverse aqua regia. This was proposed primarily to reduce the interference from Nb and Zr during mass spectrometric measurements. Almost 93% of Nb and Zr was removed after the extraction. By mixing an appropriate amount of Ar with the sample aerosol using an aerosol dilution system prior to plasma, the residual Nb oxides and Zr oxides or hydroxides could be successfully removed. The relative yields of the interfering oxides and hydroxides were as low as 0.087% (NbO/Nb) and 0.013% (ZrOH/Zr), which were 3–5 times lower than those in the traditional mode without the addition of Ar. Moreover, the signal-to-noise ratio of Ag was five times higher than that in the traditional mode. The proposed method was applied to the determination of Ag in 68 standard reference materials (SRMs) of soil, sediment, and rock. The results for 47 of these geological SRMs were in good agreement with the reference values. The Ag levels in three SRMs (GSP-2 Granodiorite, STM-2, and SGR-1b) are being reported for the first time herein. For these SRMs, 10 separate aliquots of the sample were digested and analyzed over a period of three months, and analysis revealed that the determined values were reasonable. Thus, the proposed method shows significant potential for the accurate determination of trace Ag in various geological samples.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46882356","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}

引用次数: 3