Methods for Studying Petroleum Porphyrins (Review)

Ultrahigh-Purity Vanadyl Petroporphyrins

(2018) B. McKay Rytting et al.   ENERGY & FUELS

Selective ionization by electron-transfer MALDI-MS of vanadyl porphyrins from crude oils

(2018) Deisy Giraldo-Dávila et al.   FUEL

Simultaneous Detection of Vanadyl, Nickel, Iron, and Gallium Porphyrins in Marine Shales from the Eagle Ford Formation, South Texas

(2018) Fang Zheng et al.   ENERGY & FUELS

Comparative Study of Resins and Asphaltenes of Heavy Oils as Sources for Obtaining Pure Vanadyl Porphyrins by the Sulfocationite-Based Chromatographic Method

(2018) Nikolay Alexandrovich Mironov et al.   ENERGY & FUELS

Role of Vanadylporphyrins in the Flocculation and Sedimentation of Asphaltenes of Heavy Oils with High Vanadium Content

(2017) Yulia Yurevna Borisova et al.   ENERGY & FUELS

Size Distributions of Sulfur, Vanadium, and Nickel Compounds in Crude Oils, Residues, and Their Saturate, Aromatic, Resin, and Asphaltene Fractions Determined by Gel Permeation Chromatography Inductively Coupled Plasma High-Resolution Mass Spectrometry

(2017) German Gascon et al.   ENERGY & FUELS

Chromatographic Isolation of Petroleum Vanadyl Porphyrins Using Sulfocationites as Sorbents

(2017) Nikolay Alexandrovich Mironov et al.   ENERGY & FUELS

In Situ Identification of Various Structural Features of Vanadyl Porphyrins in Crude Oil by High-Field (3.4 T) Electron–Nuclear Double Resonance Spectroscopy Combined with Density Functional Theory Calculations

(2017) Timur Biktagirov et al.   ENERGY & FUELS

Development of a chromatographic methodology for the separation and quantification of V, Ni and S compounds in petroleum products

(2017) Vicmary Vargas et al.   FUEL PROCESSING TECHNOLOGY

Oligo p-Phenylenevinylene Derivatives as Electron Transfer Matrices for UV-MALDI

(2017) Laura J. Castellanos-García et al.   JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY

Composition and sorption properties of asphaltene sulfonates

(2017) Makhmut R. Yakubov et al.   PETROLEUM SCIENCE AND TECHNOLOGY

Chromatographic isolation of vanadyl porphyrins from heavy oil resins

(2017) N. A. Mironov et al.   RUSSIAN CHEMICAL BULLETIN

The stability and evolution of oil systems studied via advanced methods in situ

(2017) O N Martyanov et al.   RUSSIAN CHEMICAL REVIEWS

Simultaneous quantitative analysis of Ni, VO, Cu, Zn and Mn geoporphyrins by liquid chromatography-high resolution multistage mass spectrometry: Method development and validation

(2016) Martijn Woltering et al.   CHEMICAL GEOLOGY

Electron Spin Resonance of Slowly Rotating Vanadyls–Effective Tool to Quantify the Sizes of Asphaltenes in Situ

(2016) Sergey N. Trukhan et al.   ENERGY & FUELS

Toward the Asphaltene Structure by Electron Paramagnetic Resonance Relaxation Studies at High Fields (3.4 T)

(2016) G. V. Mamin et al.   ENERGY & FUELS

Structural-group composition and properties of heavy oil asphaltenes modified with sulfuric acid

(2016) Makhmut R. Yakubov et al.   PETROLEUM SCIENCE AND TECHNOLOGY

Features of the composition of vanadyl porphyrins in the crude extract of asphaltenes of heavy oil with high vanadium content

(2016) M. R. Yakubov et al.   PETROLEUM SCIENCE AND TECHNOLOGY

Metal porphyrin occlusion: Adsorption during asphaltene aggregation

(2016) Jimmy Castillo et al.   PETROLEUM SCIENCE AND TECHNOLOGY

Method for the quantification of vanadyl porphyrins in fractions of crude oils by High Performance Liquid Chromatography–Flow Injection–Inductively Coupled Plasma Mass Spectrometry

(2016) Flávia G. Wandekoken et al.   SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY

High Field Electron Paramagnetic Resonance Characterization of Electronic and Structural Environments for Paramagnetic Metal Ions and Organic Free Radicals in Deepwater Horizon Oil Spill Tar Balls

(2015) Vasanth Ramachandran et al.   ANALYTICAL CHEMISTRY

Distribution of Vanadium Compounds in Petroleum Vacuum Residuum and Their Transformations in Hydrodemetallization

(2015) Tingting Liu et al.   ENERGY & FUELS

Characterization of Vanadyl and Nickel Porphyrins Enriched from Heavy Residues by Positive-Ion Electrospray Ionization FT-ICR Mass Spectrometry

(2015) He Liu et al.   ENERGY & FUELS

Structural modifications of VO2+ chelates in the organic matter of oils and bitumens from the EPR spectra

(2015) L. G. Gilinskaya et al.   JOURNAL OF STRUCTURAL CHEMISTRY

Controls on the stratigraphic distribution and nitrogen isotopic composition of zinc, vanadyl and free base porphyrins through Oceanic Anoxic Event 2 at Demerara Rise

(2015) Christopher K. Junium et al.   ORGANIC GEOCHEMISTRY

Chromatographic Enrichment and Subsequent Separation of Nickel and Vanadyl Porphyrins from Natural Seeps and Molecular Characterization by Positive Electrospray Ionization FT-ICR Mass Spectrometry

(2014) Jonathan C. Putman et al.   ANALYTICAL CHEMISTRY

Evaluation of Laser Desorption Ionization Coupled to Fourier Transform Ion Cyclotron Resonance Mass Spectrometry To Study Metalloporphyrin Complexes

(2014) Yunju Cho et al.   ENERGY & FUELS

Unprecedented Ultrahigh Resolution FT-ICR Mass Spectrometry and Parts-Per-Billion Mass Accuracy Enable Direct Characterization of Nickel and Vanadyl Porphyrins in Petroleum from Natural Seeps

(2014) Amy M. McKenna et al.   ENERGY & FUELS

Separation and identification of porphyrin biomarkers from a heavy crude oil Zaap-1 offshore well, Sonda de Campeche, México

(2014) Marcela Espinosa et al.   JOURNAL OF PORPHYRINS AND PHTHALOCYANINES

New Vanadium Compounds in Venezuela Heavy Crude Oil Detected by Positive-ion Electrospray Ionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

(2014) Xu Zhao et al.   Scientific Reports

Separation and Characterization of Vanadyl Porphyrins in Venezuela Orinoco Heavy Crude Oil

(2013) Xu Zhao et al.   ENERGY & FUELS

Unusual Analyte-Matrix Adduct Ions and Mechanism of Their Formation in MALDI TOF MS of Benzene-1,3,5-Tricarboxamide and Urea Compounds

(2013) Xianwen Lou et al.   JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY

Changes of Diameter Distribution with Temperature Measured for Asphaltenes and Their Fractions A1 and A2. Impact of These Measurements in Colloidal and Solubility Issues of Asphaltenes

(2012) Sócrates Acevedo et al.   ENERGY & FUELS

High performance liquid chromatography hyphenated to inductively coupled plasma mass spectrometry for V and Ni quantification as tetrapyrroles

(2011) Christiane Béatrice Duyck et al.   SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY

Chemistry and Association of Vanadium Compounds in Heavy Oil and Bitumen, and Implications for Their Selective Removal†

(2010) Greg P. Dechaine et al.   ENERGY & FUELS

Fractionation and speciation of nickel and vanadium in crude oils by size exclusion chromatography-ICP MS and normal phase HPLC-ICP MS

(2010) Guilhem Caumette et al.   JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY

Mass Spectrometry of Metalloporphyrins in Egyptian Oil Shales from Red Sea Area

(2010) S. Faramawy et al.   PETROLEUM SCIENCE AND TECHNOLOGY

Enrichment, Resolution, and Identification of Nickel Porphyrins in Petroleum Asphaltene by Cyclograph Separation and Atmospheric Pressure Photoionization Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

(2009) Kuangnan Qian et al.   ANALYTICAL CHEMISTRY

Separation of Petroporphyrins from Asphaltenes by Chemical Modification and Selective Affinity Chromatography

(2009) Cindy-Xing Yin et al.   ENERGY & FUELS

Trapping of Paraffin and Other Compounds by Asphaltenes Detected by Laser Desorption Ionization−Time of Flight Mass Spectrometry (LDI−TOF MS): Role of A1 and A2 Asphaltene Fractions in This Trapping

(2009) Sócrates Acevedo et al.   ENERGY & FUELS

Identification of Vanadyl Porphyrins in a Heavy Crude Oil and Raw Asphaltene by Atmospheric Pressure Photoionization Fourier Transform Ion Cyclotron Resonance (FT-ICR) Mass Spectrometry

(2009) Amy M. McKenna et al.   ENERGY & FUELS

Observation of vanadyl porphyrins and sulfur-containing vanadyl porphyrins in a petroleum asphaltene by atmospheric pressure photonionization Fourier transform ion cyclotron resonance mass spectrometry

(2008) Kuangnan Qian et al.   RAPID COMMUNICATIONS IN MASS SPECTROMETRY