Cloud droplets contain dynamic and complex pools of highly heterogeneous organic matter, resulting from the dissolution both water-soluble carbon in atmospheric aerosol particles gas-phase soluble species, are constantly impacted by chemical, photochemical, biological transformations. samples two summer events, characterized different air masses physicochemical properties, were collected at Puy de Dôme station France, concentrated on a strata-X solid-phase extraction cartridge directly...

A cloud water sample collected at the puy de Dôme observatory (PUY) has been incubated under dark conditions, with its endogenous microbiota two different temperatures (5 and 15 °C), change in molecular organic composition of this was analyzed by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). Microorganisms were metabolically active strongly modified dissolved matter since they able to form consume many compounds. Using Venn diagrams, four fractions compounds...

Secondary organic aerosols (SOA) produced in the atmosphere from sequential oxidation of biogenic or anthropogenic volatile compounds (VOC) represent a significant part atmospheric aerosol. Aerosol particles can act as cloud condensation nuclei be scavenged by droplets, where carbon undergo chemical and biological transformations. Due to its high complexity, nontargeted analysis FT-ICR MS (Fourier-transform ion cyclotron resonance mass spectrometry) has been used characterize dissolved...

A statistical analysis of 295 cloud samples collected at the Puy de Dôme station in France (PUY), covering period 2001–2018, was conducted using principal component (PCA), agglomerative hierarchical clustering (AHC), and partial least squares (PLS) regression. Our model classified water on basis their chemical concentrations dynamical history air masses estimated with back-trajectory calculations. The split our dataset into two sets, i.e., first set characterized by westerly marine...

Atmospheric aerosols (AAs) significantly influence the global radiative balance, air quality, biogeochemical cycles, and human health. While their climate health impacts are well-studied, role, including contributions of phosphorus (P), nitrogen (N), organic matter (OM) to oligotrophic regions like Mediterranean basin, is less explored. Recent studies suggest variable atmospheric deposition trace metals nutrients associated with both natural (i.e. recurring Saharan dust storms, biomass...

Direct Analysis in Real Time (DART™) high-resolution Orbitrap™ mass spectrometry (HRMS) combination with Raman microscopy was used for the detailed molecular level characterization of explosives including not only charge but also complex matrix binders, plasticizers, polymers, and other possible organic additives. A total 15 defused military weapons grenades, mines, rockets, submunitions, mortars were examined. Swabs wipes to collect trace (residual) amounts their constituents from...

Abstract Humic substances play empirically several essential functions in biogeochemical cycles such as storage of carbon, pollutants, nutrients and water, yet the underlying mechanisms remain poorly known because their precise molecular structure is largely unknown so far. Here, we extracted humic from biomass waste bell pepper, fennel, artichoke, coffee ground, husks, nursery residues. We analyzed extracts by ultra-high resolution Orbitrap Fusion Lumos Tribrid 1 M mass spectrometry, using...

Dissolved organic matter (DOM) is a small but very reactive pool of (OM) in the environment. Its role related to its composition, which depends on source. In soils, vegetation main source DOM, and biodegradation regulating mechanism. This study aims characterise DOM produced by contrasted arctic species their products. The water-extractable (WEOM) was from C. stellaris (lichen), E. vaginatum (sedge), A. polifolia (dwarf evergreen shrub) B. nana (deciduous dwarf shrub). WEOM were inoculated...

RATIONALE Despite the widespread use of direct analysis in real time mass spectrometry (DART‐MS), its capabilities terms accessible range and types polymers that can be analysed are not well known. The goal this work was to evaluate limitations ionization technique combined with orbitrap tandem spectrometry, for characterization (structural polydispersity metrics) various synthetic natural polymers. METHODS DART‐MS (and ‐MS 2 ), using an spectrometer, polymer were evaluated industrial...

Fluorinated polymers are a diverse and important class of with unique applications. However, characterization fluorinated by conventional mass spectrometric methods is challenging because (i) their high fluorine contents make them insoluble or only sparingly soluble in most common solvents (ii) commonly used matrices employed for MALDI do not desorb ionize efficiently. In this work, atmospheric-solid-analysis-probe (ASAP) high-resolution orbitrap spectrometry (HRMS) was as new tool the...

Detailed molecular composition of solid phase extracted dissolved organic matter (SPEDOM) collected from fractured-rock groundwater was compared to connected surface river water at two different watersheds in the unconfined chalk aquifer Champagne France using full scan ultrahigh resolution electrospray and photoionization Fourier transform ion cyclotron mass spectrometry (FT-ICR MS), Orbitrap tandem MS (MS/MS) 1H magnetic resonance spectroscopy (NMR). NMR indicated that SPEDOM carried a...

Concentrations of 33 metal elements were determined by ICP-MS (Inductively Coupled Plasma Mass Spectrometry) analysis for 24 cloud water samples (corresponding to 10 events) collected at the puy de Dôme station. Clouds present contrasted chemical composition with mainly marine and continental characteristics; some events, a further anthropogenic source can be superimposed on background level. In this context, measurements trace metals may help evaluate impact natural sources better...

Theoretical and experimental work has been conducted about possible prebiotic syntheses of cysteine. Activated derivatives this amino acid can oligomerize polymerize to afford various poly‐thiazolines cysteine‐rich chains.

Abstract Seven cloud water samples were collected from May to October 2018 at the Puy de Dôme station (PUY) in France and analyzed by positive‐ion atmospheric pressure photoionization [(+)APPI] Fourier transform ion cyclotron resonance mass spectrometry. The assigned formulas (ranging 3,865 6,380) attributed using multidimensional stoichiometric constraint classification of Rivas‐Ubach et al. (2018, https://doi.org.10.1021/acs.analchem.8b00529 ) six main categories (RUCs): LipidC, ProteinC,...

In podzols, the production and mobilization of dissolved organic matter (DOM) account for a considerable loss carbon from forest floor. The dynamics DOM in podzol soils pine result complex interactions between water infiltrations, weathering, biological transformation, retention-mobilization mechanisms. However, little is known about how molecular composition changes spatially soil as it moves upper horizons (organic (O) eluvial (E)) to illuvial horizon (B(h/s)) groundwater. this study,...