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massspectrometry, etc ; aerosols; algorithms; biomass; comparative study; spectrometers; China; Show all 7 Subjects
Abstract:
... The real-time detection of the mixing states of polycyclic aromatic hydrocarbons (PAHs) and nitro-PAHs in ambient particles is of great significance for analyzing the source, aging process, and health effects of PAHs and nitro-PAHs; yet there is still few effective technology to achieve this type of detection. In this study, 11 types of PAH and nitro-PAH standard samples were analyzed using a high ...
gas chromatography-massspectrometry, etc ; air; air quality; benzene; molecular imprinting; particulates; polyacrylic acid; quantitative analysis; China; Show all 9 Subjects
Abstract:
... A solid phase extraction procedure (SPE) is described for the quantitative analysis of polycyclic aromatic hydrocarbons (PAHs) in atmospheric particulate matter (PM), as ubiquitous environmental pollutants routinely measured in air quality monitoring. A SPE cartridge was used based on a molecular imprinted polymer (MIP-SPE) properly tailored for selective retention of PAHs with 4 and more benzene ...
Gregory W. Vandergrift; William Kew; Jessica K. Lukowski; Arunima Bhattacharjee; Andrey V. Liyu; Elizabeth A. Shank; Ljiljana Paša-Tolić; Venkateshkumar Prabhakaran; Christopher R. Anderton
electrospray ionization massspectrometry; tandem massspectrometry, etc ; Fusarium; analytical chemistry; brain; data collection; desorption; rats; Show all 8 Subjects
Abstract:
... Nanospray desorption electrospray ionization mass spectrometry, a powerful ambient sampling and imaging technique, is herein coupled as an isolated source with 21 Tesla (21T) Fourier transform ion cyclotron resonance mass spectrometry (FTICR MS). Absorption-mode data, enabled by an external data acquisition system, is applied for improved mass resolution, accuracy, and dynamic range without compro ...
electrospray ionization massspectrometry; tandem massspectrometry, etc ; biochemistry; data collection; humans; infarction; liquid chromatography; methanol; phlebitis; Show all 9 Subjects
Abstract:
... The purpose of this study is to establish and validate a sensitive, robust and rapid liquid chromatography-tandem mass spectrometry method for quantifying the aescinate A and aescinate B in human plasma and assessing the association of phlebitis and aescinate A and aescinate B in vivo exposure. The chromatographic separation was completed on Agilent ZORBAX SB-C₁₈ (2.1 mm × 100 mm, 3.5 μm, Agilent, ...
massspectrometry, etc ; food microbiology; microbiology; Show all 3 Subjects
Abstract:
... Mass spectrometry imaging (MSI) is a tool capable of simultaneously providing in situ untargeted chemical information as well as the spatial distribution of vast molecular species with high efficiency. Over decades, this technique has been proven quite solid in many life science disciplines including microbiology, yet few food microbiologists have been using it. This review briefly introduces MSI ...
electrospray ionization massspectrometry; tandem massspectrometry, etc ; androstenedione; calibration; diethylstilbestrol; estriol; estrone; evaporation; liquid chromatography; progestational hormones; prostaglandins; Show all 11 Subjects
Abstract:
... An analysis method for four families of hormones (estrogens, progestins, androgens and prostaglandins), dedicated to an efficient water monitoring with passive sampling, was developed using a liquid chromatography tandem mass spectrometry with triple quadrupole coupling and universal electrospray ionisation. Thirteen natural and synthetic hormones in ultra-pure water could be analysed in a single ...
... Various phenomena in living physiological systems are conducted on the hydrated conditions, and in many cases, they do not work in a dry state. Imaging mass spectrometry is one of the direct detection methods scanning the sample surface with some focused and pulsed energy and analysing the sputtered components. However, under the high vacuum conditions required for usual imaging mass spectrometry, ...
massspectrometry, etc ; Parmotrema; lichens; phytochemicals; research; Show all 5 Subjects
Abstract:
... Further phytochemical investigation on P. tsavoense led to one new meta-depsidone, parmosidone K together with one known compound, barbatic acid. Their structures were determined by 1D and 2D NMR analysis, high resolution mass spectroscopy, and comparison their NMR data with those reported in literatures. Parmosidone K was evaluated for α-glucosidase inhibition and revealed the powerful activity w ...
massspectrometry, etc ; biotechnology; feedstocks; instrumentation; robots; Show all 5 Subjects
Abstract:
... Microbial cell factories convert renewable feedstocks into desirable chemicals and materials. Due to the lack of predictive modeling, high-throughput screening remains essential for microbial strain engineering. Mass spectrometry (MS) is a label-free modality with superior sensitivity and chemical specificity. Critical advances in improving the throughput of MS assays on complex microbial samples ...
Ane Arrizabalaga-Larrañaga; Pedro de Juan-de Juan; Claudia Bressan; Mercedes Vázquez-Espinosa; Ana V. González-de-Peredo; F. Javier Santos; Encarnación Moyano
electrospray ionization massspectrometry; tandem massspectrometry, etc ; acetic acid; acetonitrile; analytical chemistry; atmospheric pressure; ionization; liquid chromatography; nylon; standard deviation; Show all 10 Subjects
Abstract:
... This work describes the development of an ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) method for the determination of 23 primary aromatic amines (PAAs) that can potentially migrate from food contact materials. The chromatographic separation was performed in a pentafluorophenylpropyl (PFPP) column achieving the separation of all PAAs in less than 6.5 min usin ...
massspectrometry, etc ; liquid chromatography; metabolism; metabolites; prototypes; Show all 5 Subjects
Abstract:
... In this study, a liquid chromatography-tandem multi-stage mass spectrometry (LC/MSⁿ) method was established to characterize the metabolites of TRG in monkeys and dogs. A total of seven metabolites of TRG besides the prototype were found, which were identified as TR (M1), TRN (M2), trans-resveratrol-4'-O-glucuronide (M2'), trans-resveratrol-3-O-glucoside-4'-O-glucuronide (M3), trans-resveratrol-3-O ...
tandem massspectrometry, etc ; pesticides; sorbents; strawberries; China; Show all 5 Subjects
Abstract:
... A method based on QuEChERS (quick, easy, cheap, effective, rugged, and safe) sample preparation coupled with ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was developed for determining 43 pesticide residues in strawberries. The clean-up sorbents were optimized, with 50 mg PSA + 50 mg C18 + 150 mg MgSO₄ showing the best performance in d-SPE. The effect of injection v ...
tandem massspectrometry, etc ; liquid chromatography; metabolites; solvents; Show all 4 Subjects
Abstract:
... The comprehensive chemical characterization of biological samples remains a central challenge in the field of natural products. Conventional workflows using liquid chromatography (LC)-coupled high-resolution tandem mass spectrometry (MS/MS or MS²) allow the detection of relevant small molecules while providing diagnostic fragment ions for their structural assignment. Still, many natural product ex ...
Gesiane da Silva Lima; Gabriel Franco dos Santos; Ruver Rodrigues Feitosa Ramalho; Deborah Victoria Alves de Aguiar; Jussara Valente Roque; Lanaia Itala Louzeiro Maciel; Rosineide Costa Simas; Igor Pereira; Boniek Gontijo Vaz
electrospray ionization massspectrometry, etc ; food chemistry; patulin; Show all 3 Subjects
Abstract:
... This work describes the use of laser ablation electrospray ionization mass spectrometry imaging (LAESI imaging) to investigate the diffusion of the mycotoxin patulin from rotten to healthy areas of fruits. Slices of mold-infected and uninfected (control) apples and strawberries were prepared, and this was the only sample preparation step used. An infrared laser beam (2.94 μm) was used to irradiate ...
massspectrometry, etc ; databases; eggs; food chemistry; metabolites; Show all 5 Subjects
Abstract:
... Nontargeted screening of both veterinary drugs and their metabolites is important for comprehensive safety evaluation of animal-derived foods. In this study, a novel nontargeted screening strategy was developed for veterinary drugs and their metabolites based on fragmentation characteristics from ultrahigh-performance liquid chromatography–high-resolution mass spectrometry. First, an in-house data ...
massspectrometry, etc ; evaporation; hydrology; models; stable isotopes; Show all 5 Subjects
Abstract:
... Splash is a widely studied phenomenon, partly forming the phenomenon of erosion. Until now, tracing the origin of splash water was a highly error-prone, or impossible, task. We propose a method for tracking splash water by means of stable isotope ratio mass spectrometry (IRMS) analysis. We tested the method on a water-water model, checking the effect of drop height, water layer thickness and the e ...
electrospray ionization massspectrometry; tandem massspectrometry, etc ; Caesalpinia sappan; Carthamus tinctorius; Rubia; color; databases; humans; museums; solvents; ultra-performance liquid chromatography; China; Show all 12 Subjects
Abstract:
... Dyes on ancient silks have been a worth studying field through human's history, although current reports ignore the connection between natural dyes origin and relevant colour reduction methods, which poses an insurmountable obstacle for restoration of historical silks. In this paper, a series of 12 red hue silks from six natural dyes (sappanwood, Chinese madder, safflower, lac, cochineal, dragon's ...
electrospray ionization massspectrometry; gas chromatography-massspectrometry, etc ; benzene; dissolved organic matter; distillation; fluorescence emission spectroscopy; petroleum; toxicity; volatile organic compounds; wastewater; Show all 10 Subjects
Abstract:
... In petroleum refineries, the electric desalting, distillation, and stripping processes could generate large amounts of wastewaters that contain toxic substances. In this study, eight wastewater samples were collected from the three typical refining processes for comprehensive chemical characterization of the dissolved organic matter (DOM) using excitation emission matrix fluorescence spectroscopy, ...
massspectrometry, etc ; beers; derivatization; food chemistry; food quality; Show all 5 Subjects
Abstract:
... The concentration of aldehydes is one of the important indicators in the food quality and safety. To efficiently analyze the four aldehydes (methanal, ethanal, propanal and n-butanal) in beer, charged microdroplet driving online derivatization apparatus coupled with high resolution mass spectrometry was firstly developed. Utilizing the high-speed reaction accelerated by microdroplets, the offline ...
massspectrometry, etc ; Poisson distribution; electric potential difference; equations; Show all 4 Subjects
Abstract:
... Time‐of‐flight (TOF) systems are one of the most widely used mass analyzers in native mass spectrometry (nMS) for the analysis of non‐covalent multiply charged bio‐macromolecular assemblies (MMAs). Typically, microchannel plates (MCPs) are employed for high mass native ion detection in TOF MS. MCPs are well known for their reduced detection efficiency when impinged by large slow moving ions. Here, ...