Article
Biochemical Research Methods
Ilaria Belluomo, Piers R. Boshier, Antonis Myridakis, Bhamini Vadhwana, Sheraz R. Markar, Patrik Spanel, George B. Hanna
Summary: The protocol outlines a standardized workflow for noninvasive analysis of VOCs within breath using SIFT-MS, aiming to advance disease detection and monitoring. With this protocol, a large number of breath samples can be analyzed in a short time, enabling direct compound quantification without the need for calibration curves.
Article
Food Science & Technology
Thomas Baerenzung dit Baron, Olivier Yobregat, Alban Jacques, Valerie Simon, Olivier Geffroy
Summary: This study investigated a quick method to discriminate grape varieties based on their volatile compound composition using SIFT-MS scan and simple chemometrics approaches. The use of O-2(+) reagent ion was found to be most effective in differentiating compounds. The technique allowed the distinction of high and low aroma compounds producers and has potential applications in various fields of viticulture.
FOOD RESEARCH INTERNATIONAL
(2022)
Article
Environmental Sciences
Ram B. Jain
Summary: The associations between urinary concentrations of oxidant polycyclic aromatic hydrocarbon (PAH) metabolites and serum concentrations of anti-oxidant alpha-klotho were examined in US adults aged 40-79 years. The study found that increased PAH metabolite concentrations were associated with decreased alpha-klotho concentrations in individuals with normal or near normal kidney function. However, the associations were not significant in individuals with albuminuria. These findings suggest that exposure to PAH may lead to reduced alpha-klotho concentrations.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biochemical Research Methods
David Smith, Patrik Spanel
Summary: The reactions between reagent ions R+ (H3O+, NO+, O-2(+)) and major gases in air and breath samples M (N-2, O-2, CO2, H2O) form weakly-bound adduct ions. These adduct ions can create ghost peaks in the mass spectrum when analyzing VOCs, especially when using nitrogen carrier gas in SIFT-MS.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2022)
Article
Biochemical Research Methods
Vaughan S. Langford, Mark J. Perkins
Summary: Recycled plastics are increasingly used for packaging FMCG, but there is a greater risk of taints entering products due to prior use and incomplete cleaning. This study proposes the use of SIFT-MS analysis coupled with multivariate statistical data processing as a high-throughput and cost-effective method for screening recycled polymers. The results show successful classification of recycled and virgin HDPE pellet products, demonstrating the potential of this approach to provide increased quality assurance for recycled polymers used in FMCG.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2022)
Article
Chemistry, Analytical
Mylene Ghislain, Marine Reyrolle, Jean-Marc Sotiropoulos, Thierry Pigot, Mickael Le Bechec
Summary: SIFT-MS utilizes ion-molecule reactions to achieve direct and rapid analysis of volatile organic compounds in the gas phase, with observations of various chemical reaction characteristics during experiments.
MICROCHEMICAL JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Magdalena Jendraszak, Miroslawa Galecka, Malgorzata Kotwicka, Andreas Schwiertz, Aleksandra Regdos, Michalina Pazgrat-Patan, Miroslaw Andrusiewicz
Summary: Alterations to the intestinal barrier may be involved in the pathogenesis of various chronic diseases. The diagnosis of mucosal barrier disruption has become a new therapeutic target for disease prevention. The study aimed to determine whether different patient demographic and biometric data may affect biomarker values. The results showed that participants declaring probiotics supplementation had lower sIgA level, and there were significant differences in sIgA level between different age groups and correlations between gut microbiota composition and biomarker levels.
Article
Biochemistry & Molecular Biology
Wai Hong Wilson Tang, Lily Tranchito, Chonyang Albert, Zeynep G. Gul, Frank S. Cikach, David Grove, Yuping Wu, Raed A. Dweik
Summary: Elevated levels of exhaled breath acetone are associated with poorer outcomes in heart failure patients, while reductions in acetone and pentane levels correlate with weight loss.
Article
Environmental Sciences
Ram B. Jain
Summary: This study found that increasing concentrations of perfluoroalkyl acids were associated with decreasing concentrations of red blood cell folate. Perfluorooctane sulfonic acid, perfluorodecanoic acid, and perfluoroundecanoic acid had a greater impact on red blood cell folate concentrations, while non-Hispanic blacks experienced smaller decreases in folate levels compared to other racial/ethnic groups.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Amelia K. Wesselink, Victoria Fruh, Russ Hauser, Jennifer Weuve, Kyla W. Taylor, Olivia R. Orta, Birgit Claus Henn, Traci N. Bethea, Michael D. McClean, Paige L. Williams, Antonia M. Calafat, Donna D. Baird, Lauren A. Wise
Summary: The study found that urinary phthalate concentrations among Black women were associated with sociodemographics, reproductive characteristics, and the use of specific personal care products. This emphasizes the importance of examining exposure determinants among multiply marginalized populations.
JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY
(2021)
Article
Endocrinology & Metabolism
Meijuan Liu, Bingyan Cao, Qipeng Luo, Qiao Wang, Min Liu, Xuejun Liang, Di Wu, Wenjing Li, Chang Su, Jiajia Chen, Chunxiu Gong
Summary: The study found that weekend sleep duration and bedtime were independently associated with the risk of childhood abdominal obesity, particularly in boys and children aged 7-12 years.
FRONTIERS IN ENDOCRINOLOGY
(2021)
Article
Biochemical Research Methods
Mylene Ghislain, Marine Reyrolle, Jean-Marc Sotiropoulos, Thierry Pigot, Herve Plaisance, Mickael Le Bechec
Summary: Organophosphate esters, an emerging environmental concern, are spreading persistently across all environmental compartments. Measurements of semivolatile organic compounds are important, and the selected ion flow tube-mass spectrometry (SIFT-MS) can be relevant for their analysis in air. This study investigated the ion-molecule reactions of organophosphate esters with different precursor ions in SIFT-MS, supported by calculations. The results showed that direct analysis of semivolatile organic compounds using SIFT-MS is feasible.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2022)
Article
Nutrition & Dietetics
Xijie Wang, Jun Ma, Sizhe Huang, Bin Dong, Yanhui Dong, Zhaogeng Yang, Jie Hu, Wannian Liang
Summary: In a 12-year retrospective growth cohort study conducted in Guangdong, it was found that TMI cutoffs outperformed WHO BMI cutoffs in predicting late adolescent overweight and obesity. Simplified TMI cutoffs showed promising results for predicting overweight and obesity in children aged 7 to 18 years.
FRONTIERS IN NUTRITION
(2022)
Article
Multidisciplinary Sciences
Chengyue Li, Alimujiang Yimiti Taerken, Qian Li, Adilijiang Selimu, Hao Wang
Summary: The study evaluated the trends in physical fitness of Chinese rural children and adolescents aged 7-18 from 1985 to 2019. Different aspects of fitness were measured during various time periods. The findings showed improvements in physical fitness from 1985-2000, followed by declines in some areas from 2000-2010. The period of 2010-2019 saw mixed trends, with some improvements and continued declines in certain aspects of fitness.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Colin Hastie, Adrian Thompson, Mark Perkins, Vaughan S. Langford, Michael Eddleston, Natalie Z. M. Homer
Summary: Self-poisoning with professional agricultural pesticide products accounts for about 20% of global suicides, with the majority occurring in South Asia and China. Faster detection of co-formulants can aid in early identification of pesticide poisoning and reduce mortality rates. SIFT-MS, a direct mass spectrometry technique, shows great promise as an alternative analytical tool for analyzing cyclohexanone and cyclohexanol in plasma, providing higher sample throughput compared to conventional GC/MS methods.
Article
Chemistry, Analytical
Jan Kratzer, Michal Lacko, Kseniya Dryahina, Tomas Matousek, Patrik Spanel, Jiri Dedina
Summary: This study investigated the atomization of hydrides and their methylated analogues in a dielectric barrier discharge (DBD) plasma atomizer using Selected ion flow tube mass spectrometry (SIFT-MS) as a detector, revealing that the atomization efficiency of SeH2 is below 80%. The research also showed that in the absence of hydrogen fraction in the carrier gas, arsenic hydride is not atomized but decomposed in the DBD atomizer.
ANALYTICA CHIMICA ACTA
(2022)
Article
Engineering, Electrical & Electronic
Prudhvi Peri, Kai Fu, Houqiang Fu, Jingan Zhou, Yuji Zhao, David J. Smith
Summary: The morphology of GaN substrates grown by HVPE and by ammonothermal methods was observed to have an impact on the performance of GaN-on-GaN p-i-n diodes. HVPE-grown substrates showed ordered surface features, while ammonothermal substrates did not. Diodes fabricated on HVPE substrates had higher reverse-bias voltages compared to those on ammonothermal substrates.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Coatings & Films
Daniel C. Messina, Kevin A. Hatch, Saurabh Vishwakarma, David J. Smith, Yuji Zhao, Robert J. Nemanich
Summary: Two atomic layer etching methods were investigated for crystalline GaN, involving oxidation, fluorination, and ligand exchange. The etching process was monitored in situ using multiwavelength ellipsometry and characterized through X-ray photoelectron spectroscopy. The results revealed the presence of fluorine and oxygen impurities on the etched surfaces, a slight reduction in thickness, and a lower removal rate than predicted. The observed reduced etch rates were attributed to the ordered structure of the oxide formed on the crystalline GaN surfaces.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Review
Spectroscopy
David Smith, Patrik Spanel, Nicholas Demarais, Vaughan S. S. Langford, Murray J. J. McEwan
Summary: SIFT-MS is a versatile analytical technique for the identification and quantification of trace gases. It has a wide range of applications, including real-time analysis of humid exhaled breath and air quality monitoring in industrial scenarios. The addition of reagent anions in SIFT-MS instruments has enhanced the analytical capability, allowing analysis of volatile compounds in humid air that cannot be done using reagent cations alone.
MASS SPECTROMETRY REVIEWS
(2023)
Article
Biochemical Research Methods
Patrik Spanel, Kseniya Dryahina, Maroua Omezzine Gnioua, David Smith
Summary: This study explained the lower detection sensitivity of saturated aldehydes compared to unsaturated aldehydes in secondary electrospray ionization mass spectrometry (SESI-MS). The results showed that the sensitivity for unsaturated aldehydes was 20 to 60 times higher than for saturated aldehydes, which can be attributed to the differences in gas phase ion-molecule reaction kinetics and energetics.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2023)
Article
Nanoscience & Nanotechnology
Abhinandan Gangopadhyay, Chaomin Zhang, Aymeric Maros, Nikolai Faleev, Richard R. King, Christiana B. Honsberg, David J. Smith
Summary: The atomic-scale structure of extended defects in GaAs/GaAs1-xSbx/GaAs (001) heterostructures has been investigated using aberration-corrected scanning transmission electron microscopy. Two types of defects were identified: a dissociated screw dislocation or a partial dislocation dipole at the tensile-strained GaAs(cap)/GaAs0.34Sb0.66 interface, and a dissociated 90 degrees dislocation at the compressively-strained GaAs0.91Sb0.09/GaAs(substrate) interface. The intrinsic stacking faults associated with these defects were bounded by Shockley partial dislocations.
SCRIPTA MATERIALIA
(2023)
Biographical-Item
Biochemical Research Methods
Patrik Spanel, Terence H. Risby
JOURNAL OF BREATH RESEARCH
(2023)
Article
Chemistry, Analytical
Stefan J. Swift, Patrik Spanel, Nikola Sixtova, Nicholas Demarais
Summary: Selected ion flowtube mass spectrometry (SIFT-MS) instruments have advanced significantly since their introduction more than 20 years ago. Previous studies conducted with He carrier gas at room temperature need to be adjusted for the new SIFT-MS instruments operating with N-2 carrier gas at elevated temperatures. The differences in reaction kinetics may be attributed to temperature, electric field, and carrier gas change. It is important to adopt an updated reaction kinetics library that accounts for the specific conditions of the new instruments.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Stefan J. Swift, Nikola Sixtova, Maroua Omezzine Gnioua, Patrik Spanel
Summary: SIFT-MS is a soft ionisation technique that can quantify trace amounts of volatile organic compounds by utilizing gas phase ion-molecule reaction kinetics. By using different reactivities of various reagent cations and anions, the technique can overcome previous limitations in resolving isomers and potentially enable their immediate identification and quantification without chromatographic separation. Experimental and computational studies have been conducted on the ion-molecule reactions of eight ions with the isomers of three aromatic compounds, providing important information on reaction rates and product ion branching ratios.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Biochemical Research Methods
Vaughan S. Langford, Kseniya Dryahina, Patrik Spanel
Summary: Selected ion flow tube mass spectrometry (SIFT-MS) has been widely used in industry and research since the mid-1990s. This review discusses the development of quantitation methods using a gas standard and reaction kinetics, as well as best practices for addressing practical issues such as the overlap of product ions. It provides a fundamental basis for a plethora of studies that can be conducted using SIFT-MS instruments.
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2023)
Article
Chemistry, Analytical
Stefan J. Swift, Kseniya Dryahina, Ann-Sophie Lehnert, Nicholas Demarais, Vaughan S. Langford, Mark J. Perkins, Leslie P. Silva, Maroua Omezzine Gnioua, Patrik Spanel
Summary: In September 2020, a contamination incident involving ethylene oxide in food products led to massive recalls across Europe. A rapid analysis method is required to ensure food safety, and it was found that using selected ion flow tube mass spectrometry (SIFT-MS) with OH- ions as reagents is the most suitable approach due to non-overlapping product ions.
ANALYTICAL METHODS
(2023)
Article
Chemistry, Physical
Maroua Omezzine Gnioua, Anatolii Spesyvyi, Patrik Spanel
Summary: Quantum chemistry calculations using DFT were performed to understand the structures and energetics of organic ions relevant to gas phase ion chemistry in soft chemical ionisation mass spectrometry. The calculations provided important insights into ligand switching ion-molecule reactions and the proton affinities of oxygen-containing organic compounds.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Food Science & Technology
Hanne Dalsvag, Janna Cropotova, Anet Rezek Jambrak, Tibor Janci, Patrik Spanel, Kseniya Dryahina, David Smith, Turid Rustad
Summary: This study aimed to delay lipid oxidation in Atlantic salmon using natural oregano and dill antioxidant extracts combined with modified atmosphere packaging. The results showed that the antioxidant treatments reduced lipid oxidation, but did not significantly affect the concentration of volatile compounds.
ACS FOOD SCIENCE & TECHNOLOGY
(2022)