Article
Chemistry, Applied
Fabio Xavier Antunes Sampaio, Karina Santos Garcia, Antonio Fernando de Souza Queiroz, Maria Elisabete Machado
Summary: Organic sulfur compounds in crude oils are important geochemical markers for maturity, lithology, and biodegradation. This study developed a gas chromatography-triple quadrupole mass spectrometry method for the determination of 14 organic sulfur compounds without preliminary fractionation, providing a precise and accurate analytical strategy.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Biochemical Research Methods
Benyuan Qin, Xiaoyu Wang, Lu Tang, Sainan Wang, Ying Shi, Liyan Zhao, Hongmei Jiang
Summary: This study developed a headspace single-drop microextraction (HS-SDME) method and a headspace (HS) method for determining methanol, and analyzed various factors affecting the extraction efficiency. The results showed that HS-SDME-GC-FID had a lower limit of detection and better reproducibility, making it suitable for the determination of methanol in wine.
JOURNAL OF CHROMATOGRAPHY A
(2022)
Article
Chemistry, Analytical
N. Manousi, A. Kabir, K. G. Furton, E. Rosenberg, G. A. Zachariadis
Summary: Capsule phase microextraction (CPME) was applied for the first time in the extraction of polycyclic aromatic hydrocarbons from water samples, showing high extraction efficiency and good linearity. The method exhibited successful application in the analysis of various water samples, with relative recoveries ranging from 94.3% to 109.8%. The green method efficiently simplified the sample preparation process and overcame the requirements of sample filtration and solvent evaporation.
MICROCHEMICAL JOURNAL
(2021)
Article
Environmental Sciences
Mohammed Mousa Alshehri, Mohamed Ali Ouladsmane, Taieb Ali Aouak, Zeid Abdullah ALOthman, Ahmed Yacine Badjah Hadj Ahmed
Summary: Phthalates are widely used synthetic chemicals mainly used as plasticizers. This study developed a method for concentration of phthalate residues leached from PET bottles and found that several bottled water brands contain different concentrations of phthalates, with DnBP being the most abundant.
Article
Chemistry, Analytical
Pelin Erdem, Aylin Altinisik Tagac, Serap Seyhan Bozkurt, Melek Merdivan
Summary: In this study, a novel SPME fiber was prepared for the extraction and analysis of polycyclic aromatic hydrocarbons. The MMT/CH/O-DIL fiber showed wider linear ranges, lower limits of detection, high extraction recoveries, and good reproducibility compared to traditional fibers.
Article
Chemistry, Analytical
Xian-Bing Xu, Khaled Murtada, Janusz Pawliszyn
Summary: In this study, a high-efficiency enrichment method using solid-phase micro extraction (SPME) arrow configuration was developed for determining trace-level volatile terpenes in fish tissue. The method demonstrated good linearity and repeatability, with the thicker coating providing higher sensitivity and expanding the range of detected compounds for headspace SPME. Theoretical calculations validated the benefits of increased coating thickness in enhancing method sensitivity.
Article
Chemistry, Applied
Jacek Lyczko, Anna Kieltyka-Dadasiewicz, Mariusz Skrzynski, Krzysztof Klisiewicz, Antoni Szumny
Summary: The commonly used protocols for determining the quality of medicinal and aromatic plants rely on the yield and composition of essential oils. However, studies have shown that the composition of essential oils does not accurately represent the volatiles emitted by the plants, making it an unreliable method for sensory quality assessment. This study measured the differences in essential oil composition and volatile emission patterns with or without a plant matrix for three chemotypes of mint. The results demonstrated that the presence of a plant matrix can significantly alter the contribution of main volatiles, suggesting that chemical analysis of essential oils is not reliable for determining the sensory quality of herbs and spices.
Article
Biochemistry & Molecular Biology
Keita Saito, Yoshiyuki Tokorodani, Chihiro Sakamoto, Hiroyuki Kataoka
Summary: A non-invasive analytical method for measuring body odor components by headspace solid-phase microextraction and gas chromatography-mass spectrometry was developed. The method successfully analyzed 2-nonenal in skin emissions and secretions and was applied to the study of body odor changes.
Article
Biochemical Research Methods
Sebastian Fassbender, Marcus von der Au, Maren Koenig, Jurgen Pelzer, Christian Piechotta, Jochen Vogl, Bjoern Meermann
Summary: The newly introduced ICP-ToF-MS instrument demonstrates enhanced sensitivity and superior isotope ratio precision, making it suitable for species-specific isotope dilution analysis, especially when analyzing multiple isotopic systems simultaneously.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Applied
Xun Guo, Jessica A. Stolee, Yannick A. Fillon, Lanfang Zou
Summary: A static headspace capillary gas chromatography (HS-GC) method has been developed for the quantitative analysis of trace levels of acrylonitrile, featuring a short run time, wide calibration range, and a diluent with strong buffering and stabilizing capability. The method was validated for specificity, accuracy, repeatability/precision, calibration range, limits of quantitation and detection, solution stability, and robustness, showing quadratic performance over a wide range of concentrations. This method is deemed suitable as a platform test method for acrylonitrile determination in oligonucleotide manufacturing processes.
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2021)
Article
Food Science & Technology
Xiaolin Luo, Xiaoyuan Wang, Ming Du, Xianbing Xu
Summary: The determination of flavor compounds in food systems, especially solid samples, can be interfered with by complex food matrices. In this study, dispersive liquid-liquid microextraction (DLLME) was applied prior to headspace solid-phase microextraction (HS-SPME) to reduce the matrix effect in solid seafood samples. The developed method showed high sensitivity, excellent linear relationship, and good recovery rate, and was able to detect maltol and ethyl maltol in selected seafood samples. DLLME coupled with HS-SPME effectively removed the influence of sample matrix and improved the sensitivity of the method.
Article
Chemistry, Analytical
Maria Antonieta P. A. Santiago, Jeancarlo Pereira dos Anjos, Madson M. Nascimento, Gisele O. da Rocha, Jailson B. de Andrade
Summary: The study developed a sample preparation method for multiple pesticides in red and rose wines using binary solvent liquid phase microextraction, demonstrating good linearity and precision values, enabling the detection and quantification of low levels of pesticide residues.
MICROCHEMICAL JOURNAL
(2021)
Article
Environmental Sciences
Pedro J. Sanches Filho, Gabriela Oliveira Andrade, Karoline Moreira, Camila Kaezynski Rockenbach
Summary: The study revealed the presence of aliphatic hydrocarbons and n-alkanes in the superficial sediments of Mangueira Lagoon, indicating a slightly impacted environment with the west margin playing a significant role in the entry of these geochemical markers.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Chemistry, Analytical
Evangelia Yiantzi, Khaled Murtada, Konstantinos Terzidis, Janusz Pawliszyn, Elefteria Psillakis
Summary: This study introduces a new method - vacuum-assisted HS-TFME, which accelerates the extraction equilibrium kinetics by utilizing vacuum conditions. Results show that under vacuum conditions, the overall extraction kinetics process is substantially accelerated, achieving sample equilibrium in a short period of time.
ANALYTICA CHIMICA ACTA
(2022)
Article
Nutrition & Dietetics
Natasa P. Kalogiouri, Natalia Manousi, Adamantini Paraskevopoulou, Ioannis Mourtzinos, George A. Zachariadis, Erwin Rosenberg
Summary: This study conducted the first assessment of the volatile metabolome map of Tuber Aestivum and Tuber Borchii from Greece using HS-SPME-GC-MS, and developed a chemometric model to discriminate the truffles according to the species and reveal characteristic volatile markers for each.
FRONTIERS IN NUTRITION
(2022)
Article
Chemistry, Analytical
Paramee Kumkrong, Patrick H. J. Mercier, Indu Pihilligawa Gedara, Ovi Mihai, Daniel D. Tyo, Jiang Cindy, David M. Kingston, Zoltan Mester
Summary: The BCR sequential extraction procedure was used to analyze three marine sediment CRMs with different contamination levels to support method development and quality control. Concentrations of 27 elements were determined, showing varying levels of uncertainty across the three materials.
Article
Geochemistry & Geophysics
Ruoxi Zhang, Kenny Nadeau, Eduardo Amilcar Gautier, Paola Alejandra Babay, Jose Luis Ramella, Marian Virgolici, Andreea Elena Serban, Viorel Fugaru, Yoshiki Kimura, Celia Venchiarutti, Stephan Richter, Yetunde Aregbe, Zsolt Varga, Maria Wallenius, Klaus Mayer, Hana Seo, Jung Youn Choi, Csaba Tobi, Mostafa Fayek, Ryan Sharpe, Kyle M. Samperton, Victoria D. Genetti, Rachel E. Lindvall, Jeremy D. Inglis, Joanna S. Denton, Andrew A. Reinhard, Barbara Francisco, Xiaolei Zhao, William Kieser, Juan He, Ying Gao, Juris Meija, Ali El-Jaby, Lu Yang, Zoltan Mester
Summary: This study presents data from thirteen laboratories worldwide for the successful certification of uranium isotope ratios in uranium ore concentrate (UOC) certified reference materials. The study found significant variation in uranium isotope ratios among the three candidate UOC CRMs, with uncertainties of the proposed certified values superior to available reference materials.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2022)
Article
Biochemical Research Methods
Enea Pagliano, Kenny Nadeau, Ovidiu Mihai, Indumathi Pihillagawa Gedara, Zoltan Mester
Summary: This study addresses the drawbacks of liquid-based seawater certified reference materials (CRMs) by developing a salt-based seawater proxy that can be reconstituted in water. The proxy demonstrates good stability for nutrients and has reduced costs compared to traditional CRMs.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
J. S. F. Pereira, R. Alvarez-Fernandez Garcia, M. Corte-Rodriguez, A. Manteca, J. Bettmer, K. L. LeBlanc, Z. Mester, M. Montes-Bayon
Summary: This study used SELTM-1 as a certified reference material to compare the selenium concentrations in intra- and extracellular regions using different experimental procedures. The sequential procedure involving cell washing and freeze drying provided the most accurate results for quantifying the selenium content in both regions.
Article
Biochemical Research Methods
Michelle M. G. Chartrand, Juris Meija, Jean-Francois Helie, Paul Middlestead, Malarvili Ramalingam, Azharuddin Abd Aziz, Zoltan Mester
Summary: Stable carbon isotope ratio measurements are used to investigate the origin of vanillin. This study analyzed commercial vanillin samples and vanilla products to establish a reference range of carbon isotope delta values in different vanillin samples. Two synthetic vanillin reference materials, VANA-1 and VANB-1, were developed for calibration purposes. The certified carbon isotope delta values of VANA-1 and VANB-1 were determined through characterization and testing using nine reference materials. The results are traceable to the VPDB.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Biochemical Research Methods
Phuong Mai Le, Estelle Martineau, Serge Akoka, Gerald Remaud, Michelle M. G. Chartrand, Juris Meija, Zoltan Mester
Summary: This study presents a workflow that combines carbon isotope ratio combustion mass spectrometry with quantitative carbon nuclear magnetic resonance spectrometry (C-13-qNMR) to obtain carbon isotope measurements traceable to the Vienna Peedee Belemnite (VPDB), which can be used to authenticate the authenticity of vanillin.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Kelly L. LeBlanc, Kenny Nadeau, Juris Meija, Lu Yang, Paola A. Babay, Marta A. Bavio, Carrie Boome, Don Chipley, Roxana S. Cristaldo Leguizamon, Joanna Denton, Dana L. Drew, Mauricio A. Fernandez, Viorel Fugaru, Victoria D. Genetti, Florencia Gonzalez, Jeremy D. Inglis, Slobodan Jovanovic, Elizabeth Keegan, Tara Kell, Yoshiki Kimura, William Kinman, Stephen Kiser, Rachel E. Lindvall, Elaine Loi, Klaus Mayer, Jean-Francois Mercier, Robert Millar, Adrian Nicholl, Liana Orlovskaya, Jose Luis Ramella, Andreea Serban, Michael A. Sharp, Youqing Shi, Csaba Tobi, Lautaro Valenzuela, Zsolt Varga, Anna Vesterlund, Marian Virgolici, Hitoshi Yamazaki, Erica N. Zubillaga, Ali El-Jaby, Zoltan Mester
Summary: This article discusses the certification campaign for three new UOC CRMs from the National Research Council Canada, involving 15 laboratories from 10 countries and using sector-field and quadrupole inductively-coupled plasma mass spectrometry to analyze 64 trace element impurities.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Jan Labuda, Jiri Barek, Zuzana Gajdosechova, Heidi Goenaga-Infante, Linda J. Johnston, Zoltan Mester, Sergei Shtykov
Summary: Analytical chemistry is essential for understanding the behavior of engineered nanomaterials (ENMs). Various techniques are used for isolation, identification, and quantification of nanomaterials in different samples. Physicochemical characterization of ENMs is also important for assessing their properties. This report provides an overview of ENMs, their properties, and analytical scenarios. It also evaluates the current status of nanomaterial identification and characterization for regulatory purposes and presents an overview of nanomaterial metrology and available reference materials.
PURE AND APPLIED CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Zuzana Gajdosechova, Joshua Marleau-Gillette, Matthew J. Turnbull, Duane C. Petts, Simon E. Jackson, Ashley Cabecinha, Hanan Abramovici, Andrew Waye, Jeremy E. Melanson
Summary: Cannabis vaping liquids may contain metal contaminants, and there are significant differences in metal content in legal samples using different devices. Metal particles could contribute to poor measurement precision and, for the first time, evidence of metal particles in unused cannabis vape pens is provided.
Article
Chemistry, Analytical
Enea Pagliano, Elizabeth Keegan, Zsolt Varga, Kenny Nadeau, Juris Meija, Henri Wong, Christopher Vardanega, Maria Wallenius, Klaus Mayer, Chris Cochrane, Ali El-Jaby, Zoltan Mester
Summary: This study quantified the inorganic anions in three uranium ore concentrates, which is useful for nuclear forensics to establish sample provenance.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Chemistry, Analytical
Kelly L. LeBlanc, Gregoire Horndli, Marc-Antoine Bergeron, Zhigen Zhang, Patrick Denoncourt, Zoltan Mester
Summary: Selenized yeast is widely used as a source of selenium in dietary supplements and research due to its high bioavailability and formation of selenium-containing metabolites. Accurate quantitation of selenomethionine, the major form of selenium in selenized yeasts, is challenging and time-consuming. The National Research Council Canada has developed an 82-Se-enriched selenized yeast Certified Reference Material, SEEY-1, which can be used as a matrix-matched spike for the analysis of selenomethionine. SEEY-1 enables reliable analysis of Se amino acid content in under an hour compared to the conventional hydrolysis method.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jan Labuda, Jiri Barek, Zuzana Gajdosechova, Silvana Jacob, Linda Johnston, Petra Krystek, Zoltan Mester, Josino Moreira, Veronika Svitkova, Kevin J. Wilkinson
Summary: This article summarizes the latest research progress in the analytical chemistry of engineered nanomaterials (ENMs), focusing on the detection, characterization, and quantification of nanomaterials in complex sample matrices. It reports the analytical methods applied in various fields and the monitoring methods for the fate of ENMs in the environment and biological systems. Numerous recently published works with detailed protocols and conclusive comments are provided in tables.
PURE AND APPLIED CHEMISTRY
(2023)
Article
Chemistry, Analytical
Zuzana Gajdosechova, Patricia Grinberg, Kevin Kubachka, Mesay Wolle, Andrea Raab, Joerg Feldmann, Rebecca Sim, asta H. Petursdottir, Tomas Matousek, Stanislav Musil, Ben Wozniak, Stephen Springer, Nausheen W. Sadiq, Hakan Gurleyuk, Calvin H. Palmer, Indumathi Pihillagawa Gedara, Zoltan Mester
Summary: The study aimed to investigate the issues in arsenic speciation analysis in biological matrices and validate the analytical methods. An international round-robin study showed that inadequate verification of the analyte's mass fractions in calibration standard solutions could introduce significant biases. The choice of extraction method had minimal impact on quantitation of arsenic species in plant and terrestrial biological tissues, but following a prescribed extraction method resulted in reduced uncertainties in complex samples such as marine animal tissues.
ENVIRONMENTAL CHEMISTRY
(2023)
Article
Biochemical Research Methods
Kelly L. LeBlanc, Tantima Kumlung, Andres Suarez Priede, Paramee Kumkrong, Thippaya Junvee, Suladda Deawtong, Jorg Bettmer, Maria Montes-Bayon, Zoltan Mester
Summary: Mushrooms are considered a valuable food source due to their high protein and fiber and low fat content. This study showed that selenium-enriched Lingzhi mushrooms contained low levels of selenium, with selenomethionine being the most abundant form. The mycelium of these mushrooms showed significant selenium accumulation and the presence of selenium nanoparticles, which could have potential medicinal value.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)