Atomic Spectroscopy最新文献

{"title":"Determination Of The Multi-Elemental Composition Of Lunar Meteorites Using Instrumental Neutron Activation Analysis","authors":"Caijin Xiao","doi":"10.46770/as.2022.026","DOIUrl":"https://doi.org/10.46770/as.2022.026","url":null,"abstract":": The Moon is a key target for long-term human exploration beyond the Earth. In addition to precious lunar returned samples, lunar meteorites can provide important supplementary information on the composition and evolutionary history of the Moon. Herein, we report the elemental compositions of two lunar meteorites, Northwest Africa (NWA) 4734 and NWA 11111, analyzed using instrumental neutron activation analysis (INAA). Reference materials, including SRM2703 and GWB07105, were used for quality control. The INAA results for most elements in NWA 4734 and NWA 11111 are consistent with the previously reported data obtained by inductively coupled plasma-mass spectrometry analysis within analytical uncertainties. Since the INAA analysis is non-destructive, it can be widely applied to trace element measurements for extraterrestrial samples.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44188684","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":"ICP-MS-Based Methodology In Metallomics: Towards Single Particle Analysis, Single Cell Analysis, And Spatial Metallomics","authors":"Mingli Chen, Meng Wang","doi":"10.46770/as.2022.108","DOIUrl":"https://doi.org/10.46770/as.2022.108","url":null,"abstract":": As an emerging interdisciplinary science, metallomics aims to integrate research fields related to metals and metalloids in biological systems from a systematic perspective. Inductively coupled plasma mass spectrometry (ICP-MS) is considered one of the most versatile tools for metallomics research. This review presents a brief overview of ICP-MS and describes recent advances in ICP-MS instrumentation. Then, ICP-MS-based methods and applications are discussed, focusing on single particle analysis, single cell analysis, and spatial metallomics. With the rapid developments in instrumentation and methodology, ICP-MS-based methodologies will evolve further and play a dominant role in metallomics research.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45187315","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":"Iron Isotopic Measurement Using Large-Geometry High-Resolution Multi-Collector Inductively Coupled Plasma Mass Spectrometer","authors":"Ming Li","doi":"10.46770/as.2022.111","DOIUrl":"https://doi.org/10.46770/as.2022.111","url":null,"abstract":": High-precision and accurate Fe isotopic analyses are essential for various geological processes. In this study, Fe isotopic measurements were optimized on a large-geometry, high-resolution Nu Plasma 1700 MC-ICP-MS instrument, which can distinguish Ar-related interferences completely as opposed to other general-sized MC-ICP-MS instruments. Under the conditions of high mass resolution, complete separation of Ar-related interference can be achieved. We evaluated the type and intensity of all Ar-related interferences. The effects of the acid molarity, concentration mismatch, residual HCl, and matrix elements were also evaluated. The results demonstrate that the molarity of the acid, residual HCl, and Cr significantly affected the precision of the Fe isotopic measurements. Fe was purified by one-step column anion-exchange separation using the anion resin AG-MP-1M. The long-term external precisions of δ 56 Fe and δ 57 Fe were greater than ± 0.03‰ (2SD) and ± 0.06‰ (2SD), respectively. The Fe isotopic compositions of the five geological reference materials measured in this study agreed with previously published data, within uncertainties.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47964798","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 Two-Column Separation Method For Determining Barium Isotopic Compositions Using MC-ICP-MS","authors":"Kaiyun Chen","doi":"10.46770/as.2022.105","DOIUrl":"https://doi.org/10.46770/as.2022.105","url":null,"abstract":": In recent years, the stable isotope composition of barium has emerged as a powerful tracer for understanding crucial geo-social processes; therefore, it is necessary to develop an efficient method for Ba isotopic ratios. Herein, we describe a rapid method for determining the isotopic ratios of Ba using a multi-collector inductively coupled plasma mass spectrometer in the low-resolution mode (Neptune Plus). In this method, the exact amount of the resin and the low eluted volume of the acid used in column purification significantly reduce the time required for Ba separation. Instrumental mass bias calibrations were performed for both standard-sample bracketing (SSB) and double-spike methods. The results show that the double-spike method provided Ba isotopic ratios with higher precision than the SSB technique. The effects of acid molarity and concentration mismatch, as well as the potential matrix effect, were investigated in the wet plasma mode. We evaluated the Ba isotopic compositions of ten geological reference materials, namely, BCR-2, BHVO-2, AGV-2, GSP-2, RGM-2, G-2, GSR-3, GSR-5, GSR-8, and GSR-11. Results indicated that these compositions were highly accurate with respect to the international Ba isotope standard, NIST SRM 3104a. Furthermore, the Ba isotopic compositions of most geological reference materials examined in this study agreed well with previously published data within the quoted analytical uncertainties. The long-term reproducibility analyses of all standards indicated that the obtained isotopic ratios were highly reproducible for δ 138/134 Ba, with precisions of ≤ ±0.05‰ (2SD). Compared to previous reports, we optimized the process of chemical purification, separated Ba samples faster, and improved the efficiency of the analyses employed in this study.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44953319","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 Cd And Ni In Salvia Yunnanensis By Deep Eutectic Solvent-Based Rapidly Synergistic Cloud Point Extraction And ICP-OES Analysis","authors":"Wen Wen","doi":"10.46770/as.2022.100","DOIUrl":"https://doi.org/10.46770/as.2022.100","url":null,"abstract":": In this study, a deep eutectic solvent (DES)-based rapid synergistic cloud point extraction (RS-CPE) was coupled with inductively coupled plasma optical emission spectrometry (ICP-OES). This unprecedented method was used for the simultaneous determination of Cd and Ni in the medicinal plant Salvia yunnanensis C. H. Wright ( S. yunnanensis ). Compared with traditional CPE, RS-CPE was accomplished rapidly at room temperature. In this study, DES was used as an environmentally friendly cloud point and synergic reagent to decrease the cloud point temperature (CPT) of Triton X-114 (TX-114) and assist the subsequent rapid extraction process, thereby replacing toxic organic reagents. The experimental parameters affecting extraction efficiency were investigated and optimized. Using this combined extraction method and analytical technique, the analytical performance of ICP-OES was notably improved. Under the optimal conditions, the limits of detection (LOD) of Cd and Ni were 0.01 and 0.05 μg L -1 , and the limits of quantification (LOQ) were 0.04 and 0.16 μg L -1 , respectively. The enhancement factors (EFs) of Cd and Ni were 33 and 30; the spiked recoveries were 96.1–105% and 90.3–106%, respectively. The established method was applied to analyze S. yunnanensis samples with satisfactory results and provided a simple, rapid, sensitive, and green method for the determination of potentially toxic elements in medicinal herbs. reagent. results showed that there was no statistical difference between the results obtained for the real samples, as determined by the established method, compared with those obtained using ICP-MS. These results indicate that the proposed method is accurate and reliable.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2022-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45307517","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":"Improved Pb-Free Sn-Bi Alloy Mounting Technique For Ion Probe U-Pb Analyses Of Zircon","authors":"Sen Hu","doi":"10.46770/as.2022.065","DOIUrl":"https://doi.org/10.46770/as.2022.065","url":null,"abstract":": Zircon, a common U-rich accessory mineral occurring in terrestrial and extraterrestrial rocks, serves as a crucial tool for unraveling the temporal and geochemical clues on geologic events that have taken place on Earth and other planetary bodies. Zircon water content analysis has been advanced in the past three years via a novel sample preparation method using Sn-Bi alloy as a mounting material. Here, we present an improved Pb-free Sn-Bi alloy material for mounting samples and investigate whether the alloy mounts are suitable for in situ U-Pb dating. The secondary ion mass spectrometry (SIMS) U-Pb dating results show that the count rates of 204 Pb for zircon standards in the alloy mount are less than 0.01 cps/nA, and the calculated U-Pb and Pb-Pb ages of zircon standards are consistent with the recommended values within analytical uncertainties. Our results indicate that the alloy material used in this study is a good mounting material for U-Pb dating. Therefore, we recommend that this Pb-free Sn-Bi alloy material can be applied to mount geological samples for water abundance and U-Pb systematic analyses.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2022-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42402427","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":"Mineral Heterogeneity Of Lunar Sub-Milligram Basaltic Clasts And Its Effect On The Production Rates Of Cosmogenic Nuclides","authors":"Huaiyu He","doi":"10.46770/as.2022.013","DOIUrl":"https://doi.org/10.46770/as.2022.013","url":null,"abstract":": Precise determination of the chemical composition of lunar samples is crucial for obtaining cosmogenic noble gas production rates and reliable cosmic ray exposure (CRE) ages. In this study, we established a new non-destructive method for determining the chemical composition of small mineralogically heterogeneous lunar basaltic clasts (<1 mg) using high-resolution X-ray microcomputed tomography (μCT). The volume of the individual mineral grains in each clast was obtained via μCT and combined with the chemical composition and density of the minerals to estimate the bulk chemical composition of each sample. The calculated chemical compositions were ultimately used to determine cosmogenic nuclide production rates. We used the lunar mare simulant sample (LMS-1) to evaluate the uncertainty of our method on the calculation of production rates of cosmogenic Ne ( 20 Ne, 21 Ne, and 22 Ne) and Ar ( 36 Ar and 38 Ar) (4% and 5% were adopted as suggested values, respectively). By applying this method to five Chang’E-5 basaltic clasts, we demonstrated that the chemical compositions of lunar regolith clastic samples (basalts) were different and the maximum variations of P 21 (the production rate of cosmogenic 21 Ne) and P 38 (the production rate of cosmogenic 38 Ar) among the five basaltic clasts were in the range of 18–20%. Therefore, the average chemical composition cannot be used to represent a single grain. In our study, mineral heterogeneity influenced the theoretical production rate of cosmogenic noble gases. Furthermore, the maximum cosmogenic 21 Ne production rate deviation from the average value reached 18.4% (~2 g/cm 2 ). Our method significantly minimized the uncertainties in the production rate calculations caused by the mineral heterogeneity of the sub-milligram samples and when applied routinely would result in more reliable CRE ages.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2022-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48976866","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":"Pb/Pb And U/Pb Dating By NanoSIMS With The Radio-Frequency Ion Source Using 16O2- As The Primary Species","authors":"Ya-nan Yang","doi":"10.46770/as.2022.019","DOIUrl":"https://doi.org/10.46770/as.2022.019","url":null,"abstract":": NanoSIMS features a capability of high spatial resolution, which allows for Pb/Pb and U/Pb dating at the submicron scale, using a recently established radio-frequency (RF) oxygen ion source. However, the secondary ion yield of Pb + is relatively low when using 16 O - as the primary beam species compared to that obtained using large-geometry secondary ion mass spectrometry (LG-SIMS), which limits the precision of Pb/Pb and U/Pb dating. In this study, using 16 O 2- as the primary species with an RF oxygen source on a CAMEA NanoSIMS 50L ion probe, we acquired Pb sensitivity in zircon of approximately 12 cps/nA/ppm. Analyses of the zircon reference materials M257 and OG1 resulted in Pb isotopic compositions consistent with their reference values and Pb/Pb age with an uncertainty of ~3 % for the target region of interest (ROI) smaller than an area of 2 μm × 2 μm. Pb/U age with an uncertainty < 2.2% was acquired via Pb/U correction based on the Pb/U vs. UO 2 /U power relationship or the Pb/UO vs. UO 2 /UO one. The adoption of 16 O 2- as the primary species for the RF ion source is as a possible approach for accurate U/Pb age determination. It scale, with low precious extraterrestrial","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2022-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42862178","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 Tungstates, Thiotungstates, And Polytungstates In Natural Waters By Reverse Phase Ion Pair Chromatography Coupled With ICP-MS","authors":"Q. Guo","doi":"10.46770/as.2022.032","DOIUrl":"https://doi.org/10.46770/as.2022.032","url":null,"abstract":": Polymeric tungstates exhibit different toxicities and mobilities when compared to those of monomeric tungstates. However, there is limited information on the occurrence of polytungstates in natural waters due to the lack of a reliable analytical approach for the determination of aqueous polytungstates. In this study, we conducted a simultaneous analysis of monomeric and polymeric tungsten species in natural water using reverse-phase ion pair chromatography coupled with inductively coupled plasma mass spectrometry (RP-IPC-ICP-MS). Polytungstates and five monotungstates, including tungstate as well as mono, di, tri, and tetrathiotungstate, were chromatographically separated within 35 min of using ethanol (12 - 48% gradient) as the mobile phase. The detection limit of polytungstates was 1.50 µg/L. Although common for the analsis of metals, experimental studies based on electrospray ionization - high resolution mass spectrometry (ESI-HRMS) have indicated that samples containing polytungstates should not be acidified, as it could result in the transformation of monotungstates to artifact polytungstates. Overall, our study offers an effective method for the analysis of various tungsten species, especially polytungstates, at environmentally relevant concentrations.","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2022-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49488537","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":"Combined Separation Of Iron, Calcium, And Magnesium From Composite Lunar Samples For High-Precision Isotope Analyses","authors":"Yongsheng He","doi":"10.46770/as.2022.020","DOIUrl":"https://doi.org/10.46770/as.2022.020","url":null,"abstract":": Fe, Ca, and Mg isotopes have been applied to Apollo and Luna samples in order to explore the origin and evolution of the Moon. In most previous studies, only one specific element was separated and measured for its isotope compositions, thereby consuming different splits of samples. Considering the rarity and preciousness of lunar samples, herein we present a three-step purification scheme to separate Fe, Ca, and Mg from a single aliquot of sample solutions with the amounts of these elements down to 20, 15, and 10 μg, respectively. Fe was first collected using 0.4 mL of AG1-X8 resin in a HCl medium. Matrices from the first column containing Ca and Mg were then passed through columns filled with 0.4 mL of DGA resin, with Mg being eluted by 11.5 mL of 4N HNO 3 , and Ca being quantitatively recovered by 10 mL of 8N HNO 3 + 0.2N HF. Mg was then purified using AG50W-X8 in a 1N HNO 3 medium. Fe and Mg isotope analyses were conducted by multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS), and Ca isotope data were obtained by Triton Plus thermal ionization mass spectrometry (TIMS) following procedures previously established in the same laboratory. Quantitative recovery of Fe, Ca, and Mg for the entire procedure was demonstrated by ten composite samples analogous to the representative lunar samples from the Apollo missions. The shifts in δ 56 Fe, δ 44/42 Ca, and δ 26 Mg of the composite samples were -0.003 ± 0.013‰ (2SD, N = 30), -0.007 ± 0.028‰ (2SD, N = 7), and 0.006 ± 0.015‰ (2SD, N = 29), respectively, ensuring high precision and accuracy of the procedure for combined Fe, Ca, and Mg isotope analyses. The robustness of the procedure was further assessed by replicate analyses of three well-characterized international reference materials (BCR-2, BHVO-2, and W-2a), and the results were consistent with previously published values. The procedure established herein allowed us to obtain combined Fe, Ca, and Mg isotopic datasets from single splits of precious extra-terrestrial samples, thereby providing new insights into the origin and evolution of their parent bodies ( e.g. , the Moon).","PeriodicalId":8642,"journal":{"name":"Atomic Spectroscopy","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2022-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47058908","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}