Article
Chemistry, Analytical
Tomohiro Narukawa, Toshihiro Suzuki, Satoki Okabayashi, Koichi Chiba
Summary: An online internal standard correction technique using an autosampler system equipped with HPLC was developed to enhance the precision of HPLC-ICP-MS analysis. The autosampler sequentially takes up sample solutions, rinses the nozzle, uses air as a spacer, and injects the internal standard solution into a sampling loop. The application of this technique improved the repeatability of 20 μL sampling from 2.5% to 1.2% and effectively improved the analytical precision of arsenic speciation.
ANALYTICAL METHODS
(2023)
Article
Spectroscopy
Naoki Shirai, Yuta Yokozuka, Saki Terai, Rahat Khan, Mitsuru Ebihara
Summary: A method for accurately determining Pb and Bi contents in geochemical and cosmochemical solid samples using ICP-QMS is described. The accuracy of the method is validated by analyzing reference samples, and the obtained results are in good agreement with literature values.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2022)
Review
Chemistry, Analytical
Robert Clough, Chris F. Harrington, Steve J. Hill, Yolanda Madrid, Julian F. Tyson
Summary: The 13th Atomic Spectrometry Update (ASU) focuses on advances in elemental speciation, covering a variety of analytical atomic spectrometry methods developed for different areas of research. The number of publications on arsenic and selenium speciation remains similar to last year, while studies on mercury, iron, halogen, and sulfur speciation have increased, demonstrating the diversity and expansion of research in this field.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2022)
Article
Chemistry, Analytical
Wei Zhang, Guangyi Sun, Runsheng Yin, Xinbin Feng, Zuxiu Yao, Xuewu Fu, Lihai Shang
Summary: The study developed an offline two-round purging-trapping method for separating MeHg from biological samples, which allows for efficient MeHg separation and precise analysis. The method showed high MeHg recoveries with similar accuracy and uncertainty to existing methods.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Article
Chemistry, Analytical
Xiaotong Ding, Wenting Bu, Youyi Ni, Xuepeng Shao, Ke Xiong, Chuting Yang, Sheng Hu
Summary: A method was developed for precise measurement of REEs in uranium ore samples, showing consistent results within the same type of ore samples and significant variations among different types. The distribution patterns of REEs in uranium ore samples could potentially serve as unique fingerprints for source identification of related nuclear materials.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Article
Chemistry, Analytical
Esther S. Breuninger, Julie Tolu, Sylvain Bouchet, Lenny H. E. Winkel
Summary: Although oceans play a crucial role in the global selenium cycle, there is limited quantitative information available on selenium concentrations and speciation in marine environments. This study developed a sensitive method using species-specific isotope dilution gas chromatography coupled to inductively coupled plasma mass spectrometry (ID-GC-ICPMS) to determine the different selenium chemical fractions in seawater, allowing for the measurement of selenium concentrations in brackish and marine systems.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Suvi Kulomaki, Elmeri Lahtinen, Siiri Peramaki, Ari Vaisanen
Summary: A simple and sensitive method utilizing 3D printed metal scavenger for preconcentration and speciation of mercury species in water samples has been developed. By studying experimental parameters, MeHg and iHg concentrations in water samples were successfully determined with high analytical accuracy.
Article
Chemistry, Multidisciplinary
Maite Aramendia, Diego Leite, Javier Resano, Martin Resano, Kharmen Billimoria, Heidi Goenaga-Infante
Summary: This paper presents a methodology based on isotope dilution for the mass determination and sizing of silver nanoparticles using single-particle ICP-TOFMS. The proposed method measures NP isotope ratios in a particle-to-particle approach, allowing for the characterization of NP mass and size distributions. The method optimization for precision and accuracy included the selection of spike isotopic composition and concentration.
Article
Chemistry, Analytical
Viktoria Lindemann, Jessica Schmidt, Benedikt Cramer, Hans-Ulrich Humpf
Summary: The analysis of trace contaminants in environmental samples is crucial for exposure assessment and evaluation of potential risks to human health. Currently, high resolution mass spectrometry methods are gaining popularity due to their enhanced selectivity, although the complex composition of environmental samples can have significant effects on the performance of mass analyzers.
ANALYTICAL CHEMISTRY
(2022)
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
Agronomy
Peter Ragalyi, Tuende Takacs, Aron Soos, Bela Kovacs, Mihaly Dernovics, Zdenko Loncaric, Peter Dobosy, Gyula Zaray, Mark Rekasi
Summary: This study examined the selenium species composition of four vegetables and found that the proportion of selenium species varies among different plant species and is influenced by soil types. Tomatoes and green peas had higher amounts of organic selenium, while cabbage and carrots had higher proportions of selenate.
Review
Chemistry, Multidisciplinary
Philip A. Doble, Raquel Gonzalez de Vega, David P. Bishop, Dominic J. Hare, David Clases
Summary: Elemental imaging provides insights into the chemical composition of living organisms, with potential applications in understanding disease states. Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) has emerged as a principal elemental imaging technique for biologists.
Article
Chemistry, Analytical
Zheng Bo Liu, Jing Zhang, Shuo Jiang, Han Su
Summary: A new and accurate method was developed to determine the dissolved concentrations of Ga in natural waters. Chelex-100, Nobias Chelate PA-1, and Presep((R)) PolyChelate resins were compared for Ga extraction from river water and seawater. Presep((R)) PolyChelate resins were chosen for analysis due to their wide extraction range at low pHs. The optimal isotope dilution conditions for Ga concentration measurements in natural water were discussed.
Article
Chemistry, Analytical
Yihuan Song, Qingfang Ma, Heyong Cheng, Jinhua Liu, Yuanchao Wang
Summary: A method utilizing online solid-phase extraction coupled with high performance liquid chromatography and inductively coupled plasma mass spectrometry was developed for simultaneous enrichment and analysis of ultra-trace lead and mercury species in water. This method allows for efficient and accurate determination of lead and mercury species in water samples, with high enrichment factors and low LODs and LOQs. The method was successfully applied to analyze trace lead and mercury species in various types of water samples, showing promising results for unstable sample analysis.
ANALYTICA CHIMICA ACTA
(2021)
Article
Engineering, Environmental
Mareike Gutensohn, Jeffra K. Schaefer, Elena Yunda, Ulf Skyllberg, Erik Bjorn
Summary: In this study, the researchers investigated the combined effects of chemical speciation of divalent, inorganic mercury and cell physiology on microbial formation of methylmercury. They found that low-molecular-mass thiols played a crucial role in enhancing MeHg formation by altering the partitioning and speciation of Hg(II). However, the conversion of cysteine to penicillamine by cells may suppress MeHg formation in cysteine-rich environments like biofilms.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)