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With current trends in proteomics, especially regarding clinical and low input (to single cell) samples, it is increasingly important to both maximize the throughput of the analysis and maintain as much sensitivity as possible. The new generation of mass spectrometers (MS) are taking a huge leap in sensitivity, allowing analysis of samples with shorter liquid chromatography (LC) methods while digging as deep in the proteome. However, the throughput can be doubled by implementing a dual column nano-LC-MS configuration. For this purpose, we used a dual-column setup with a two-outlet electrospray source and compared it to a classic dual-column setup with a single-outlet source.
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http://dx.doi.org/10.1021/acs.analchem.4c00845 | DOI Listing |
J Agric Food Chem
September 2025
Laboratory of Analytical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimioupolis Zografou, Athens 15771, Greece.
An innovative 4D targeted method was developed for the determination of 61 bioactive compounds in royal jelly (RJ) related to their health-promoting properties. The method, apart from high-resolution mass spectrometry, exploits the advantages of vacuum-insulated probe-heated electrospray ionization source (VIP-HESI), reducing thermal degradation, and trapped ion mobility spectrometry (TIMS), improving selectivity and compound identification. The optimization of VIP-HESI ionization parameters using experimental designs showed that the critical parameters were the capillary voltage as well as the probe gas flow rate and temperature.
View Article and Find Full Text PDFAntioxidants (Basel)
August 2025
Laboratorio de Desarrollo de Bioprocesos Sostenibles (Labisost), Escuela de Agronomía, Facultad de Ciencias Agronómicas y de los Alimentos, Pontificia Universidad Católica de Valparaíso, Casilla 4-D, Quillota 2260000, Chile.
This study investigates the phenolic composition and antioxidant potential of root extracts from three varieties (green, red, and orange) using ultra-high-performance liquid chromatography coupled with diode array detection and electrospray ionization-tandem mass spectrometry (UHPLC-DAD-ESI-MS/MS). Phenolic compounds were extracted with a hydromethanolic solvent and quantified by spectrophotometric assays, while antioxidant activity was assessed through DPPH, ABTS, iron III reduction, hydroxyl radical, and nitric oxide scavenging methods. A total of 26 compounds were identified, including piscidic acid, epicatechin-3--gallate, and isovitexin, with several phenolics newly reported for roots.
View Article and Find Full Text PDFFoods
August 2025
Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.
The widespread use of non-ionic surfactants, e.g., nonylphenol ethoxylates or dodecyl ethoxylates, may result in their occurrence in foodstuffs.
View Article and Find Full Text PDFBiotechnol Adv
August 2025
Université de Reims Champagne-Ardenne, INRAE, FARE, UMR, A 614 Reims, France. Electronic address:
Lignocellulosic biomass (LB), which encompasses various plant samples, requires thorough characterization to optimize its use as a carbon resource. Chemical imaging simultaneously provides chemical and spatial information, offering significant benefits for LB analysis. This review presents an overview of the most advanced techniques for achieving this goal.
View Article and Find Full Text PDFACS Bio Med Chem Au
August 2025
Laboratory for Bioanalytical Chemistry, University of Neuchâtel, Avenue de Bellevaux 51, CH-2000 Neuchâtel, Switzerland.
-acyl ethanolamines represent conserved lipophilic signaling molecules that function as endogenous ligands at G-protein-coupled receptors, ion channels, and nuclear receptors. Using a combination of comparative ultrahigh-performance liquid chromatography electrospray ionization high-resolution tandem mass spectrometry (UHPLC-ESI-HR-MS) analysis and microreactions, a diversity of glycosylated -acyl phosphoethanolamines were characterized in nematodes. Representative examples were enriched by RP-C18 chromatography and identified by NMR spectroscopy.
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