Article
Biochemical Research Methods
Jaewoong Jang, Shun Sekimoto, Tsutomu Ohtsuki, Katsuyoshi Tatenuma, Akira Tsuguchi, Mitsuru Uesaka
Summary: This paper presents a mathematical description of technetium-selective chromatographic (TSC) 99mTc separation and analyzes its compatibility with low specific activity (LSA) 99Mo. The formula developed for TSC 99mTc separation was validated using an electron linear accelerator and activated carbon-based TSC (AC-TSC) 99mTc generators. The results confirmed the compatibility of TSC 99mTc separation with LSA 99Mo and its practical application in estimating the number of TSC 99mTc generators required.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Article
Chemistry, Multidisciplinary
Makoto Matsueda, Kayo Yanagisawa, Kazuma Koarai, Motoki Terashima, Kenso Fujiwara, Hironobu Abe, Akihiro Kitamura, Yoshitaka Takagai
Summary: A fully automated analytical system was demonstrated to accurately measure radioactive technetium-99 at very low concentrations, avoiding interference from isobaric and polyatomic sources.
Article
Spectroscopy
Liang Yang, Wenting Bu, Ke Xiong, Yanqiu Yang, Tongzai Yang
Summary: This study developed a method for monitoring 99Tc in solid environmental samples. The use of alkali fusion instead of acid digestion ensured minimal loss of Tc during sample preparation. A simple separation method using TRU resin in alkaline solution was established, and water was used for elution and direct measurement of Tc. The method achieved high chemical recoveries and demonstrated fast and efficient analysis.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2022)
Article
Chemistry, Applied
Francisco L. F. da Silva, Davino M. Andrade Neto, Fernando L. de Menezes, Ivero P. Sa, Julymar M. de Higuera, Pierre B. A. Fechine, Luelc S. da Costa, Ana R. A. Nogueira, Gisele S. Lopes, Wladiana O. Matos
Summary: A novel iron-magnetic nanomaterial functionalized with organophosphorus compound was utilized in arsenic speciation analysis in seafood samples, showing concentrations of inorganic arsenic between 20 and 100 μg kg(-1). The method demonstrated good accuracy, precision, low cost, and compliance with green chemistry principles, with a detection limit of 16.4 ng kg(-1).
Review
Chemistry, Analytical
Andrei R. Timerbaev, Olga Kuznetsova, Bernhard K. Keppler
Summary: This article critically analyzes the current and emerging capabilities of analytical methods for the analysis and characterization of ENPs in seawater in the past decade, focusing on the importance of experimental strategies to avoid the high-salt matrix effect and enrich the nanoparticulate fraction before analysis. The methods rely on elemental mass spectrometry and single-particle mode to characterize the transformation of ENPs in seawater.
Article
Biochemistry & Molecular Biology
Olga V. Kuznetsova, Bernhard K. Keppler, Andrei R. Timerbaev
Summary: This study used sector-field inductively coupled mass spectrometry to assess the presence and quantity of engineered nanoparticles (ENPs) in coastal seawater samples from the Black Sea. Filtration and ultrasound-mediated acidic dissolution were used to separate and analyze the ENPs. The study found measurable concentrations of ENPs containing Cu, Zn, V, Mo, and Sn in seashore surface water, which were related to industrial and/or urban stress and potentially natural background levels.
Article
Geochemistry & Geophysics
Frederic Moynier, Yan Hu, Kun Wang, Ye Zhao, Yvan Gerard, Zhengbin Deng, Julien Moureau, Weiqiang Li, Justin I. Simon, Fang-Zhen Teng
Summary: The Nu SapphireTM MC-ICP-MS is a high-precision instrument for measuring potassium isotopes, effectively addressing major isobaric interferences and providing high potassium sensitivity. The precision and accuracy of potassium isotopic data are influenced by several parameters, including total potassium concentration, matching of potassium intensities between sample and standard, and the presence of matrix elements.
Article
Chemistry, Analytical
Raquel Gonzalez de Vega, Samantha Goyen, Thomas E. Lockwood, Philip A. Doble, Emma F. Camp, David Clases
Summary: This study investigates various strategies to enhance the detection and characterization of microplastics in complex matrices like seawater. It is found that ICP-MS/MS methods can improve size detection limits, reduce background signal, and increase selectivity.
ANALYTICA CHIMICA ACTA
(2021)
Article
Chemistry, Analytical
Weichao Zhang, Jianfeng Lin, Sui Fang, Chen Li, Xiaowei Yi, Xiaolin Hou, Ning Chen, Haitao Zhang, Yihong Xu, Haijun Dang, Wei Wang, Jiang Xu
Summary: The study presents a new method for accurately measuring ultra-trace levels of Pu-239 in high-uranium samples, eliminating interferences and providing a solution to a challenging issue in the field. The method combines mass spectrometry technology with a chemical separation procedure to achieve precise measurements.
Article
Environmental Sciences
Nadine Belkouteb, Henning Schroeder, Julia Arndt, Jan G. Wiederhold, Thomas A. Ternes, Lars Duester
Summary: Triple-quadrupole inductively coupled plasma mass spectrometry (ICP-QQQ-MS) is a unique analytical technique used for determining total element concentrations in various matrices, with wide linear range and short analysis times. By applying this method in future river water monitoring networks, a better understanding of natural transport processes and global biogeochemical element cycles can be achieved, and the number of methods can be reduced.
Article
Polymer Science
Olga V. Kuznetsova, Sergey N. Shtykov, Andrei R. Timerbaev
Summary: Plastic pollution is a serious environmental issue that faces transformations and degradation when exposed to the marine environment. The study evaluated the performance of isotope ratio mass spectrometry technique in identifying the origins and monitoring the compositional alterations of plastic materials in seawater. Microfiltration was proposed as a method to assess the release of micro/nano fragments from plastic products. The study also found that toxic metals can be adsorbed on the surface of plastics from seawater. Overall, this research measures the degradation of different polymer types in seawater, providing important reference data for future research on plastic pollution.
Article
Chemistry, Analytical
Yan Xu, Beibei Chen, Man He, Zewei Cui, Bin Hu
Summary: This study developed an all-in-one microfluidic chip system for efficient separation and quantitative analysis of rare CTCs and their ASGPR surface biomarkers.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Yan Xu, Beibei Chen, Man He, Zewei Cui, Bin Hu
Summary: This study developed an all-in-one microfluidic chip system combined with single cell-inductively coupled plasma mass spectrometry (SC-ICP-MS) for efficient separation and quantitative analysis of circulating tumor cells (CTCs). The method showed high separation efficiency and purity, allowing for accurate analysis of surface receptors on CTCs, which can be useful for studying targeted drug delivery in cancer therapy.
ANALYTICAL CHEMISTRY
(2023)
Article
Geochemistry & Geophysics
Juan Xu, Yulong Guo, Shouye Yang, Simon V. Hohl, Wen Zhang
Summary: This study developed a calculation method for SiO2 concentrations in sediment samples based on the mass balance principle. The method showed good accuracy and precision and had the advantages of low sample consumption, high efficiency, and saving time and labor costs compared to separate sample preparation and analysis.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Article
Engineering, Environmental
Feiyun Tou, Zuoshun Niu, Jiquan Fu, Jiayuan Wu, Min Liu, Yi Yang
Summary: This study developed a simple standardized protocol for separating and analyzing metal-containing NPs in sediment samples using SP-ICP-MS technique. The separation efficiency of NPs and large particles in sediments was recommended with a settling time of 6 hours, and optimal sediment to water ratio, ultrasonication power, time, and temperature were determined. The recoveries of spiked Ag and Au-NPs were 71.4% and 81.1% using the optimized method.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Yixuan Liu, Xiaolin Hou, Jixin Qiao, Weichao Zhang, Miao Fang, Mu Lin
Summary: Soil erosion poses a serious threat to the sustainability of natural ecosystems worldwide, particularly in the Loess Plateau in China. This study analyzed soil samples from different land use types in a typical watershed in the region and estimated widespread soil erosion rates over the past six decades. The study discussed the impacts of human activities, land utilization types, vegetation coverage, and terrain on soil erosion, as well as the accumulation of eroded soil.
Article
Engineering, Environmental
Mu Lin, Jun She, Jens Murawski, Xiaolin Hou, Jixin Qiao
Summary: This study examines the long-term memory effect of the Baltic Sea on pollutants and nutrients using simulation and tracer analysis. The results highlight the continuous export of pollutants and nutrients from the Baltic Sea to downstream areas, emphasizing the importance of understanding and managing marine environment in the North-Baltic Sea region.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Analytical
Ning Chen, Weijian Zhou, Yukun Fan, Luyuan Zhang, Shan Xing, Qi Liu, Xiaolin Hou
Summary: A method of separating iodine in waters associated with coalbed methane (CBM) was developed using evaporation and solvent extraction for the determination of I-129 and exploration of CBM resources. The I-129/I-127 ratios in water samples from a CBM field were found to be (1.6-2.4) x 10(-11), which are lower than environmental samples in Xi'an but higher than the procedural blank, indicating no measurable contamination during sample analysis and some input of modern water in the CBM water.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Chemistry, Analytical
Yixuan Liu, Xiaolin Hou
Summary: Ten soil cores were collected from the Loess Plateau in China to investigate the source, level, and distribution of plutonium isotopes. The analysis revealed that global fallout is the main source of plutonium in the area and severe soil erosion has resulted in significant loss of plutonium. Land use types, vegetation coverage, and topography play important roles in the preservation and redistribution of plutonium, and alfalfa shows promise as a restoration plant for mitigating soil erosion in the northern Loess Plateau.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Chemistry, Analytical
Tong Zhang, Huan Jiang, Ning Chen, Yongchang Wang, Mengting Zhang, Xiaolin Hou
Summary: A sensitive method for the determination of low-level tritium in seawater samples was established by enriching tritium from a large volume of seawater using electrolysis and ultra-low level liquid scintillation counting measurement. Through controlling the electrolysis conditions and optimizing the measurement parameters, a constant and optimal overall measurement efficiency of tritium was obtained. The method achieved a detection limit of 0.45 TU for tritium using 700 mL seawater samples, allowing for the determination of tritium in most seawater samples except for deep seawater. The developed method has been applied to determine tritium in the East China Sea.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Chemistry, Analytical
Josephine T. Kristensen, Xiaolin Hou
Summary: A method for determining the content of Po-210 in soil and sediment samples without the use of hydrofluoric acid has been developed. The method involves fusion of samples with sodium hydroxide and sodium peroxide, followed by extraction and measurement using alpha spectrometry.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Editorial Material
Chemistry, Analytical
Shuangchen Ruan, Xiaolin Hou
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Chemistry, Analytical
Shan Xing, Chenyang Peng, Marcus Christl, Keliang Shi, Hans-Arno Synal, Xiaolin Hou
Summary: A new method was developed for simultaneous determination of transuranium nuclides using 300 kV AMS after sequential chemical separation. The method showed consistent chemical behaviors of Np and Pu on the TK200 column and Am and Cm on the DGA column during the separation process. The detection limits for all radionuclides were below femtogram level.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
I. Llopart-Babot, M. Vasile, A. Tarancon, H. Bagan, A. Dobney, S. Boden, M. Bruggeman, M. Leermakers, J. Qiao, P. Warwick
Summary: This work presents a new method for determining 36Cl in radioactive waste samples, using novel plastic scintillator (PS) materials for concentration and scintillation counting detection. Different types of PS materials were compared, with PS resin showing the best performance for 36Cl analysis. Pyrolysis and bubbling trapping were used to concentrate the volatile elements, followed by loading onto a PS resin cartridge. Scintillation counting and ion chromatography were used for activity concentration and chemical recovery determination, respectively.
APPLIED RADIATION AND ISOTOPES
(2023)
Editorial Material
Environmental Sciences
Jixin Qiao, Nuria Casacuberta, Paul MC. Ginnity
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Chemistry, Analytical
Zhao Huang, Xiaolin Hou, Xue Zhao
Summary: This study reports a rapid analytical method to simultaneously determine Pu-238, Pu-239, Pu-240, and Pu-241 using triple-quadrupole inductively coupled plasma mass spectrometry (ICP-MS/MS) combined with chemical separation. The method achieved high decontamination factors for uranium interference and effectively eliminated isobaric interferences. The overall elimination efficiency and removal efficiency of uranium interference were significantly improved compared to reported methods. The detection time was reduced to minutes, satisfying the requirement for rapid analysis.
ANALYTICAL CHEMISTRY
(2023)
Article
Geochemistry & Geophysics
Gang Lin, Jixin Qiao, Paul A. Dodd, Rafael Goncalves-Araujo, Mats A. Granskog, Peter Steier, Colin A. Stedmon
Summary: This study demonstrates the improvement in estimating the transit times of different Atlantic water pathways in the Arctic Ocean by combining measurements of CDOM with U-236(NRPs).
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Engineering, Environmental
Yixuan Liu, Xiaolin Hou, Xue Zhao, Weichao Zhang, Qi Liu, Mu Lin
Summary: The study analyzed surface soil and soil core samples from Northern Xinjiang and found that the main source of I-129 in the region is European nuclear fuel reprocessing plant releases, accounting for over 70% of the total inventory. Less than 20% originates from global fallout of atmospheric nuclear weapons tests, and less than 10% comes from regional deposition of nuclear weapons tests at the Semipalatinsk site. The distribution of I-129 in the surface soil is primarily influenced by topography, wind fields, land utilization, and vegetation coverage.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Zhao Huang, Xiaolin Hou, Jixin Qiao, Xue Zhao
Summary: An analytical method based on ICP-MS/MS was developed to determine femtogram levels of 237Np, 239Pu, and 240Pu in environmental samples. By controlling the valence states of Np and Pu, consistent behavior was achieved and 242Pu was used as the chemical yield tracer. The method achieved a high decontamination factor and effectively eliminated interferences and peak tailing. It enables accurate determination of femtogram levels of 237Np, 239Pu, and 240Pu in samples with high U/Np and U/Pu atom ratios.
Article
Chemistry, Analytical
Shan Xing, Chenyang Peng, Marcus Christl, Keliang Shi, Hans-Arno Synal, Xiaolin Hou
Summary: Accelerator mass spectrometry (AMS) is a highly sensitive technique for measuring long-lived actinides. A new method was developed for simultaneous determination of transuranium nuclides (Np, Pu, Am, and Cm isotopes) using 300 kV AMS. The method uses sequential chemical separation and tracers for monitoring yield. The established method has high detection efficiency and has been successfully applied in nuclear forensic investigation.
ANALYTICAL CHEMISTRY
(2023)
