Article
Environmental Sciences
Jan Borovicka, Jan Sacky, Antonin Kana, Martin Walenta, Lukas Ackerman, Simone Braeuer, Tereza Leonhardt, Hana Hrselova, Walter Goessler, Pavel Kotrba
Summary: Thelephora penicillata is a mushroom that can accumulate high concentrations of Cd, As, Cu, and Zn in its fruit-bodies. In this study, its accumulation ability was compared with other ectomycorrhizal mushroom species, and it was found that T. penicillata accumulated significantly more of these elements than other mushrooms. The analysis of cell extracts suggested that intracellular Cd in T. penicillata may be present in compartmentalized Cd species and partially binding with certain peptides. The isotopic composition of Cd in T. penicillata was found to match the mycoavailable soil Cd fraction.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Analytical
Dilan M. Ratnayake, Ryoji Tanaka, Eizo Nakamura
Summary: Nickel isotope ratios have traditionally been used as an important tracer in cosmochemistry, and recently, it has gained attention in geochemistry, biochemistry, and environmental sciences with the development of MC-ICP-MS. Purification of Ni before isotope measurement is mandatory for obtaining precise data, and a new isolation procedure without using DMG has been proposed, achieving near-complete Ni recovery with the aid of oxalic acid and common inorganic acids.
ANALYTICA CHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Ren T. C. Marquez, Francois L. H. Tissot
Summary: The double spike (DS) technique is crucial for high-precision and high-accuracy mass-dependent isotope fractionations. The recently developed cosmo software package addresses the need to optimize DS measurements for small samples with mass-independent anomalies, allowing for a wider range of sample types and measurement scenarios.
Article
Chemistry, Analytical
Panshu Song, Tao Zhou, Jun Wang, Song Wang, Tongxiang Ren, Hai Lu
Summary: This study developed an improved calibrated mass spectrometry method for the absolute determination of copper isotopic composition and investigated instrumental mass bias correction factor for copper isotopic analysis using MC-ICPMS through two independent strategies. The results were consistent and validated each other. The proposed method was successfully applied to re-measure copper isotope amount ratios in reference materials, significantly reducing the uncertainties. Additionally, the study determined the absolute copper isotopic compositions in natural-abundance samples and introduced a new SI-traceable copper isotopic reference material.
ANALYTICA CHIMICA ACTA
(2022)
Article
Geochemistry & Geophysics
Yankun Di, Evgenii Krestianinov, Sonja Zink, Yuri Amelin
Summary: High-precision measurement of Sr-84/Sr-86 variations using TIMS is crucial for understanding planetary volatile depletion history and isotopic reservoirs in the early Solar System. Discrepancies between static and multidynamic TIMS measurements indicate biases, with fractionation drift significantly affecting the Sr-84/Sr-86 ratio. Corrections for these effects reveal an accurate average mu Sr-84 value for terrestrial samples and highlight differences between standard and natural samples.
Article
Chemistry, Multidisciplinary
Rikard Malmbeck, Nidhu Lal Banik, Adrian Nicholl, Joan Horta-Domenech, Martin Vargas Zuniga, Klaus Luetzenkirchen
Summary: This work presents a method for accurately determining the concentration of Cm in a solution by spiking a Cm-244 solution with a known isotopic vector but unknown concentration, with a Pu reference standard. The concentration and activity of Cm-244 are determined by measuring the alpha peak ratio of Cm-244/Pu using alpha spectrometry. The method was found to have high precision, with an overall uncertainty of less than 0.67%.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Biochemical Research Methods
A. Retzmann, D. Walls, K. A. Miller, J. Irrgeher, T. Prohaska, M. E. Wieser
Summary: The application of Ca isotopic analysis in biomedical studies has great potential to identify changes in Ca metabolism and bone metabolism. By employing DGA resin for Ca purification, a double-spike technique, and MC TIMS for analysis, data quality was improved and the potential of the new detection method was confirmed.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Yue Sun, Yu Liang, Chao Wang, Baofeng Zhao, Zhen Liang, Xiaodan Zhang, Yukui Zhang, Lihua Zhang
Summary: Comprehensive characterization of membrane proteins at the level of proteoforms in complex biological samples by top-down mass spectrometry (MS) is of vital importance in revealing their precise functions. However, severe peak broadening in the separation of hydrophobic membrane proteins, caused by resistance to mass transfer and strong adsorption on separation materials, leads to MS spectra overlap and signal suppression, which makes against the in-depth research on membrane proteoforms.
ANALYTICAL CHEMISTRY
(2023)
Article
Physics, Atomic, Molecular & Chemical
Kelly McHugh, Eirik Krogstad
Summary: This study introduces a new method for filament modification using laser ablation for femtogram-level analysis of plutonium. By coating the surface with a film and ablating to create a point source, it simplifies the sample loading process for low-level TIMS analysis.
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
(2021)
Article
Nuclear Science & Technology
Fatemeh Mansourzadeh, Mohammad Mahdi Shadman, Javad Karimi Sabet, Valiyollah Ghazanfari
Summary: The thermal diffusion column is a method for separating stable isotopes, which is suitable for small-scale operations. In this study, the R cascade was used to design and determine the number of columns, and a square cascade was adopted for the final design. The results showed that a cascade of 85 columns is recommended to separate the stable Ne isotopes.
NUCLEAR SCIENCE AND TECHNIQUES
(2023)
Article
Biochemical Research Methods
John Seeley, Nicolaas E. Schimmel, Stacy K. Seeley
Summary: This study investigates the impact of pulse width on the height and width of peaks in a secondary column of GC x GC separation. The results show that the area, height, and width of peaks can be accurately modeled using a convolution of a rectangular function and a Gaussian distribution. The minimum peak width for various compounds can be determined, and it is found that injecting pulses with widths matching the minimum peak width result in peaks that are 25% wider and 76% of the maximum peak height. Increasing the injection width beyond the minimum width leads to substantially broader peaks with only a modest increase (<25%) in peak height.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Biochemical Research Methods
Pratima Pathak, Alexandre A. Shvartsburg
Summary: Differential ion mobility spectrometry (FAIMS) is a novel tool for postionization separations in mass spectrometry, and high-definition FAIMS has enabled the resolution of molecular isomers and isotopic shifts in positive mode. In this study, we achieved high-resolution separation of phthalic acid isomers in negative mode FAIMS, and demonstrated that the resolving power and isotopic shifts are similar to analogous haloaniline cations. The additive and orthogonal nature of different shifts, including the new O-18 shift, further confirmed the generality of these properties across elements and charge states.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2023)
Article
Chemistry, Analytical
Ken Broeckhoven, Gert Desmet
Summary: This tutorial reviews the separation performance and parameters in chromatography, discussing peak width and analysis time in both isocratic and gradient elution. It elaborates on the effects of peak compression and extra-column dispersion in gradient elution and provides an overview of experimental evaluation methods for these contributions.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Jong-Ho Park
Summary: In this study, isotopic analysis of ultra-trace uranium was performed using TIMS and the data integration process was optimized. Method III was recommended for its accuracy and precision in individual microparticle analysis by TIMS.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Daniil A. Boiko, Konstantin S. Kozlov, Julia V. Burykina, Valentina V. Ilyushenkova, Valentine P. Ananikov
Summary: Mass spectrometry is a convenient, sensitive, and reliable method for analyzing complex mixtures, with applications in materials science, life sciences, and chemistry. However, accurately assigning signals in complex mixtures remains a challenge. This study presents a novel approach using gradient-boosted decision trees and neural networks to generate molecular formulas from mass spectrometry data, providing a detailed analysis.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Geochemistry & Geophysics
Fang Liu, Hong L. Zhu, Xin Li, Gui Q. Wang, Zhao F. Zhang
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2017)
Article
Biochemical Research Methods
Guiqin Wang, Tiantian Sun, Jifeng Xu
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2017)
Article
Geochemistry & Geophysics
Fang Liu, Xin Li, Guiqin Wang, Yufei Liu, Hongli Zhu, Jinting Kang, Fang Huang, Weidong Sun, Xiaoping Xia, Zhaofeng Zhang
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2017)
Article
Biochemical Research Methods
Guiqin Wang, Yuling Zeng, Jifeng Xu, Wengui Liu
JOURNAL OF MASS SPECTROMETRY
(2018)
Article
Geochemistry & Geophysics
Hongli Zhu, Fang Liu, Xin Li, Guiqin Wang, Zhaofeng Zhang, Weidong Sun
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2018)
Article
Geochemistry & Geophysics
Long Zhang, Wei-dong Sun, Zhaofeng Zhang, Yajun An, Fang Liu
GEOCHIMICA ET COSMOCHIMICA ACTA
(2019)
Article
Geochemistry & Geophysics
Guiqin Wang, Hauke Vollstaedt, Jifeng Xu, Wengui Liu
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2019)
Article
Geochemistry & Geophysics
Fang Liu, Xin Li, Ya J. An, Jie Li, Zhao F. Zhang
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2019)
Article
Geochemistry & Geophysics
Nian Wang, Guiqin Wang, Ting Zhang, Lixin Gu, Chi Zhang, Sen Hu, Bingkui Miao, Yangting Lin
Summary: The Huoyanshan iron meteorite in the Gobi Desert has high Ni content, low precious metal content, and belongs to the IAB-sLH subgroup. Its structure indicates a formation process and a cooling rate of 3-50 degrees C/Myr, consistent with other sLH irons, suggesting re-accretion with a thick brecciated layer in the parent body.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2021)
Article
Geochemistry & Geophysics
Jin-Ting Kang, Dmitri A. Ionov, Fang Liu, Chen-Lei Zhang, Alexander V. Golovin, Li-Ping Qin, Zhao-Feng Zhang, Fang Huang
EARTH AND PLANETARY SCIENCE LETTERS
(2017)
Article
Chemistry, Analytical
Michelle Buoso, Beatrice Campanella, Massimo Onor, Emanuela Pitzalis, Alessandro D'Ulivo
Summary: The use of BH intermediates as derivatization reagents significantly improves the tolerance to interference from transition metal ions in the generation of SbH3 and BiH3, and shows high tolerance in a wide range of acidity. The method has been successfully applied to the determination of Sb and Bi in complex samples, providing further understanding of the chemical behavior of borohydrides.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)
Article
Chemistry, Analytical
Chao-Feng Li, Xuan-Ce Wang, Zhu-Yin Chu, Peng Peng
Summary: Thermal ionization mass spectrometry (TIMS) is the standard method for obtaining precise Sr-87/Sr-86 isotopic ratios. However, our developed hydrofluoric acid coprecipitation method offers a low-cost, rapid, simple, and high-throughput alternative for analyzing red wine samples, effectively eliminating isobaric interference and matrix element inhibition.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)
Article
Chemistry, Analytical
Ivan B. Krstic, Bratislav M. Obradovic, Milorad M. Kuraica
Summary: This paper presents the spatio-temporal dynamics of a Grimm-type microsecond pulsed glow discharge (mu PGD) in argon at 6 mbar. The occurrence of a high current peak during the discharge ignition is analyzed and the importance of displacement current is emphasized. The development of electron excitation temperature for argon atoms and ions at various distances from the cathode is measured. The spatio-temporal evolution of selected spectral lines of argon and copper atoms and ions is analyzed during different phases of the discharge. The results suggest that the behavior of spectral line emissions differs between the pre-peak and afterglow periods, with different lines reaching maximum intensity during these phases. The appearance time and decay time of the afterpeak are shorter for ions than for atoms. These findings are explained in terms of three-body recombination processes and ion mobilities.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)
Article
Chemistry, Analytical
Qiuyun Wang, Anmin Chen, Xun Gao
Summary: In this paper, the combination of Tesla coil discharge (TCD) and laser-induced breakdown spectroscopy (LIBS) was used to enhance the emission of Al atomic lines and AlO molecular bands. The optimized distance between the TCD tip and the sample surface was found to be 5 mm, and the optimal laser energy was 25.1 mJ. Furthermore, TCD-SELIBS showed lower limits of detection (LoDs) for Cr and Pb elements compared to surface enhanced LIBS (SELIBS). The combination of TCD and LIBS is a promising technology for high-sensitivity analysis of heavy metals in water, with the advantages of simplicity, low cost, ease of operation, industrialization, and commercialization.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)
Article
Chemistry, Analytical
Yanwen Tang, Tingguang Lan, Jianfeng Gao, Zhongjie Bai, Xiaowen Huang, Junjie Han, Na Liu
Summary: Titanium is an important metal widely used in various industries. Ilmenite minerals are the main source of titanium metal and can be found in igneous and metamorphic rocks as well as different types of deposits. To accurately determine U-Pb ages of ilmenite, a new calibration method and appropriate reference materials are urgently needed. Laser ablation sector field inductively coupled plasma mass spectrometry has been used to minimize matrix effects and zircon 91500 has been identified as a suitable reference material for measuring the Pb/U ratio in ilmenite. The direct calibration method using zircon 91500 as an external standard has been found to be effective for in situ U-Pb dating of ilmenite samples under different ablation settings.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2024)