A5007660943- Petroleum Processing and Analysis
- Hydrocarbon exploration and reservoir analysis
- Mass Spectrometry Techniques and Applications
- Geochemistry and Geologic Mapping
- Metabolomics and Mass Spectrometry Studies
- Analytical Chemistry and Chromatography
- Oil Spill Detection and Mitigation
- Phytochemicals and Antioxidant Activities
- Enhanced Oil Recovery Techniques
- Identification and Quantification in Food
- Atmospheric and Environmental Gas Dynamics
- Bamboo properties and applications
- Biological and pharmacological studies of plants
- Venomous Animal Envenomation and Studies
- Biological Activity of Diterpenoids and Biflavonoids
- Microbial bioremediation and biosurfactants
- Geography and Environmental Studies
- Analytical chemistry methods development
- Bariatric Surgery and Outcomes
- Dental Radiography and Imaging
- Gastroesophageal reflux and treatments
- Natural product bioactivities and synthesis
- Antimicrobial Peptides and Activities
- Enzyme Catalysis and Immobilization
- Heavy metals in environment
Universidade Estadual de Campinas (UNICAMP)
2013-2021
Pontifícia Universidade Católica de Campinas
2015-2018
Hospital de Clínicas da Unicamp
2018
The performance of the high-field MegaOrbitrap Fourier transform mass spectrometer (FT-MS) with electrospray ionization (ESI) was evaluated to perform petroleum sample characterization via classical petroleomics approaches. Pertinent parameters that underpin main figures merit, is, signal noise ratios, dynamic range, spectral error, scan speed, accuracy and resolving power = Rp, provide subsidies develop these analyzers were tested. Comparisons are made data obtained using most common...
The technique of choice for petroleomics has been ultra-high-resolution and high-accuracy Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS), but other techniques such as mobility have shown to provide additional or alternative information about crude oil composition. Using the traveling wave (TWIM) cell a hybrid Q-TWIM-TOF first-generation Synapt instrument electrospray ionization in both positive negative modes, different samples with polar compound profiles petro...
Profiles for polar heteroatom compounds were obtained via Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) using electrospray ionization (ESI) in negative-ion mode a set of 30 Brazilian oil samples from distinct sedimentary basins and used to estimate biodegradation extents. The initially subjected traditional geochemical analysis classify them term levels as based on the Peters Moldowan scale (PM scale). When profiles correlated with PM scale, it was found that O1, N,...
IM-MS, was performed in a new uniform-field drift tube, IM-QTOF instrument. It can resolve and characterize crude oil its contaminants, as well petrofuels their additives.
A comprehensive investigation of the formation fullerenes from carbonaceous materials using laser-based mass spectrometry techniques.
The ultrahigh resolution and mass accuracy of Fourier transform ion cyclotron resonance spectrometry (FT-ICR MS) with the aid soft ionization techniques, such as electrospray (ESI), have been shown to provide fast comprehensive class composition information crude petroleum samples distillates. This has translated into major geochemical properties oil, but level reliability petroleomic approach by FT-ICR MS compare or predict sample characteristics remains an open question. To access this...
A total of 15 standard compounds with structures similar to those normally found in crude oils were analyzed using an ultrahigh-resolution and high-accuracy Fourier transform ion cyclotron resonance (7.2 T LTQ FT Ultra, Thermo Fisher, Bremen, Germany) mass spectrometer. Four different ionization techniques used: electrospray (ESI), atmospheric pressure chemical (APCI), photoionization (APPI), a novel technique that couples APCI APPI, herein termed photo- (APPCI). Relationships between...
The main phenolic constituents of <italic>S. obovatum</italic> leaf extracts, analyzed by FT-ICR MS, were correlated with their antioxidant and <italic>in vitro</italic> antiproliferative activities.
Asphaltenes are still problematic fractions and their composition is not fully unveiled as it relates to the original crude oil precipitation method. In this work, of asphaltenes precipitated with n-heptane n-pentane from ten oils Sergipe-Alagoas Basin were assessed by ultrahigh resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) using five ionization procedures (electrospray (ESI), ESI(+) formic acid, ESI(−) ammonium hydroxide, tetramethylammonium atmospheric...
Design of experiments (DOE) applied to mass spectrometry (MS), mainly focusing on the optimization ionization techniques, has been optimize in order provide highest amount information with lowest number experiments.However, DOE not used petroleomics.For first time, we main parameters associated crude oil analysis a petroleomics approach.For technique, atmospheric pressure photoionization (APPI) selected and data were acquired high resolution (400,000 at m/z 400) accuracy (< 1 ppm) Fourier...
Representative tar balls collected in two distinct years (2012 and 2014) a beach along the State of Bahia, northeastern Brazil, were geochemically characterized order to identify correlations between them investigate potential sources.Terpanes steranes biomarkers (detected by gas chromatography coupled mass spectrometry, GC-MS), carbon stable isotope ratio (δ 13 C), Ni V ratios polar compounds Fourier transform ion cyclotron resonance spectrometry using electrospray ionization negative mode...
The presence of acidic compounds as naphthenic acids in crude oil causes several problems for the petroleum industry, including corrosion both upstream and downstream production processes. Based on this scenario, main objective work was to investigate removal compound from two Brazilian heavy oils by adsorption processes using six potential adsorbents: powdered shale, activated carbon, bentonite, silica gel, sandstone wood. These raw materials were previously characterized conventional...
In the last years most of petroleum reserves discovered in Brazil, except for large pre-salt reserves, as well many parts world, contain unconventional oils with lower API gravity and high total acid number (TAN).The main species responsible by acidity are naphthenic acids, which also leads to several problems industry, such corrosivity both up downstream production processes.In this context, aim work was study corrosiveness 35 Brazilian crude oil samples using relative abundance O 2 class,...
n-ALKYLCYCLOHEXANES
Summary In this work, we investigate in detail the acidic polar composition of five oil samples from distinct fields Sergipe-Alagoas Basin (Brazil) by FT-ICR MS using ESI(-). We aim to present significance species reveal geochemical information petroleum fluids and reconstruct maturity depositional environment source rocks extracting features biodegradation. The heteroatom class distribution shows great variability, with a higher abundance N O2 classes, followed O1, NO, NO2 classes....