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Determination of Umifenovir and Its Metabolites by High-Performance Liquid Chromatography with Combined Mass Spectrometric Detection
AbstractAn approach to the highly sensitive and selective determination of the bromine-containing antiviral drug umifenovir (Arbidol) and its...
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Analysis and Identification of Peptide Postbiotics by LC-MS, MALDI-TOF Mass Spectrometry
The systematic examination of protein identity, amount, and function is known as proteomics. The proteome is a complex and dynamic structure, in...
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Flavan-3-ol (Flavanol) Identification and Quantitation by High Performance Liquid Chromatography Coupled with Mass Spectrometry (HPLC-MSn)
Flavan-3-ols are widely distributed in higher plants, such as grapes, located in the skins and seeds, being transferred to the wine during...
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New Trends in Chemical Identification Methodology
AbstractThe main techniques, approaches, methods, and information products used in recent years for the identification of chemical compounds are...
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Rapid Determination of Aminoglycosides in Milk by Exact Ion Masses Using Ultra-High-Performance Liquid Chromatography–High Resolution Quadrupole Time-of-Flight Mass Spectrometry
AbstractA method is proposed for the rapid determination of 10 aminoglycosides (amikacin, apramycin, gentamycin, hygromycin B, dihydrostreptomycin,...
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Sample Screening and Determination of 214 Veterinary Drug Residues in Food Using Chromatography–High-Resolution Mass Spectrometry
AbstractA combination of sample screening and subsequent confirmatory detection of contaminants represents an optimal strategy for routine analysis...
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Comparison of high-resolution mass spectrometry acquisition methods for the simultaneous quantification and identification of per- and polyfluoroalkyl substances (PFAS)
Simultaneous identification and quantification of per- and polyfluoroalkyl substances (PFAS) were evaluated for three quadrupole time-of-flight mass...
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Impurity identification in thiamethoxam by high resolution mass spectrometry and computer assisted elucidation
Thiamethoxam (TMX) is a widely used neonicotinoid insecticide in pest control. Identification of structurally related impurities is very important...
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Determination of Tetracyclines and Their 4-Epimers in Milk by Solid-Phase Extraction (SPE) and Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
Tetracyclines are antimicrobial agents commonly employed in veterinary medicine. These substances have the potential to leave residues in food...
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Secondary Metabolites Identification Techniques of the Current Era
Plants possess a vast spectrum of specialized metabolites with various chemical structures and biological functions responsible for plant fitness,...
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Systematical targeted multicomponent characterization and comparison of Arnebiae Radix and its three confusing species by offline two-dimensional liquid chromatography/LTQ-Orbitrap mass spectrometry
Arnebiae Radix, commonly known as “Zicao,” can be easily confused with other compounding species, posing challenges for its clinical use. Here, we...
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Dextran as internal calibrant for N-glycan analysis by liquid chromatography coupled to ion mobility-mass spectrometry
LC–MS is one of the most important tools for the comprehensive characterization of N -glycans. Despite many efforts to speed up glycan analysis via...
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Mass Spectrometry
Mass spectrometry is a useful technique for determination of molecular weight and molecular formula of an unknown compound. In this technique, mass...
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Rapid Screening and Determination of Residual Amounts of β-Lactam Antibiotics in Foods by Ultrahigh-Performance Liquid Chromatography–High-Resolution Quadrupole Time-of-Flight Mass Spectrometry
AbstractWe developed procedures for the rapid screening and sensitive determination of residues of 19 β-lactam antibiotics in matrices of various...
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Rapid Identification and Determination of N-Nitrosamines in Food Products by Ultra-High-Performance Liquid Chromatography–High Resolution Quadrupole-Time-of-Flight Mass Spectrometry by Exact Masses of Protonated Molecules
AbstractA method is proposed for the rapid identification and determination of seven N -nitrosamines in food products by ultra-high-performance...
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Identification of the initial reactive sites of micellar and non-micellar casein exposed to microbial transglutaminase
To investigate the influence of the internal micellar structure on the course of enzymatic cross-linking especially in the initial phase of the...
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In-line formation and identification of toxic reductive metabolites of aristolochic acid using electrochemistry mass spectrometry coupling
Small-molecule metabolism has been extensively studied in the past decades, notably driven by the development of new pharmaceutical ingredients. The...
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Molecular networking and collision cross section prediction for structural isomer and unknown compound identification in plant metabolomics: a case study applied to Zhanthoxylum heitzii extracts
Mass spectrometry-based plant metabolomics allow large-scale analysis of a wide range of compounds and the discovery of potential new active...
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Determining the parent and associated fragment formulae in mass spectrometry via the parent subformula graph
BackgroundIdentifying the molecular formula and fragmentation reactions of an unknown compound from its mass spectrum is crucial in areas such as...
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Simultaneous determination of seven bile acids to study the effect of ivermectin on their plasma levels in rat by UHPLC–MS/MS
Bile acids (BAs) are considered to be important diagnostic biomarkers to understand the pathophysiology of hepatobiliary and metabolic diseases. BAs...
