Petroleomics by EASI(±) FT-ICR MS

Abstract

An ambient ionization/desorption technique, namely, easy ambient sonic-spray ionization mass spectrometry (EASI), has been applied to crude oil samples. From a single droplet of the sample placed on an inert surface, EASI(+/-) is shown to promote efficient desorption and ionization of a myriad of polar components via the action of its cloud of very minute supersonic bipolar charged droplets. The gaseous [M + H](+) and [M - H](-) ions concurrently formed by EASI(+/-) were analyzed by Fourier transform mass spectrometry (FT-ICR MS), and a total of approximately 6000 acidic and basic components have been attributed. EASI(+/-) FT-ICR MS of crude oils is show to be almost as fast as ESI(+)/ESI(-) FT-ICR MS, providing similar compositional information of polar components and spectral quality comparable to that of a commercial nonochip-based robotic ESI device. EASI(+/-) requires no sample workup thus eliminating risks of contamination during sample manipulation and memory effects because of carry over in pumping ESI lines. More importantly, EASI(+/-) is a voltage-free ionization technique therefore eliminating risks of redox processes or duality of ionization mechanisms that can be observed in voltage-assisted processes. Data visualization via typical petroleomic plots confirms the similarity of the compositional information provided by EASI(+/-) compared to ESI(+)/ESI(-). The ambient EASI(+/-) FT-ICR MS method requires no voltage switching in changing the ion polarity mode, offering a workup, heating and voltage-free protocol for petroleomic studies performed at open atmosphere directly on the undisturbed crude oil sample.

Structural and proactive safety aspects of oxidation debris from multiwalled carbon nanotubes

“…The electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS) technique has been shown to provide a comprehensive overview, at the molecular level, of complex mixtures such as natural organic matter and crude oils [25,26]. Therefore, we decided to study DEBRIS obtained from HNO 3 -treated MWCNTs by the ESI FT-ICR MS technique.…”

Discrimination of arabica coffee cultivars by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry and chemometrics

“…Ultra-high resolution and mass accuracy mass spectrometers, such as those using Fourier transform ion cyclotron resonance (FT-ICR) analysers, have been successfully applied in metabolomics investigations for many years (Aharoni et al, 2002;Cuadros-Inostroza et al, 2010;Takahashi et al, 2008). FT-ICR MS provides high mass resolution and accuracy with mass errors of 1 ppm or less, which combined with a soft ionization, as electrospray ionization (ESI), enables the determination of molecular formulae from mass measurements only (Corilo et al, 2010;Garrett, Vaz, Hovell, Eberlin, & Rezende, 2012;Marshall & Rodgers, 2004).…”

Comprehensive Characterization of Second-Generation Biofuel from Invasive Freshwater Plants by FT-ICR MS

“…The PetroMS process is described elsewhere [16]. We considered a match between the experimental m/z value and the theoretical m/z value from the library when the mass error was<1 ppm.…”

“…FT-ICR MS with electrospray ionization (ESI) in both the positive and negative ion modes has been widely used in petroleomic studies to characterize crude oils and derivatives [15]. Petroleomics by ESI-FT-ICR MS has been shown to allow for class attributions of the thousands of polar compounds present in crude oils and to provide crucial data for the oil industry [16,17].…”