Improved ion optics for introduction of ions into a 9.4-T Fourier transform ion cyclotron resonance mass spectrometer

Yu, Chang; Leach, Franklin E.; Kaiser, Nathan K.; Dang, Xibei; Ibrahim, Yehia; Norheim, Randolph V.; Anderson, Gordon A.; Smith, Richard; Marshall, Alan G.

doi:10.1002/jms.3523

Cited by 12 publications

(10 citation statements)

References 28 publications

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“…Leachates were acidified to pH ∼2 and solid phase extracted with PPL Bond Elut (Agilent) resin cartridges, which were eluted in methanol . Each extract was diluted in methanol to a final concentration of 200 μgC/mL and analyzed in triplicate by direct infusion negative-ion electrospray ionization ((−) ESI) coupled to a custom-built Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer equipped with a 9.4 T 220 mm room-temperature bore superconducting magnet (Oxford Instruments, Abingdon, U.K.). − Multiple (50) time-domain acquisitions were coadded, Hanning-apodized, zero-filled once, and then Fourier transformed with a modular ICR data acquisition station (MIDAS) . Signals were only considered if greater than 6σ root-mean-square (RMS) baseline noise.…”

Section: Methodsmentioning

confidence: 99%

Molecular and Spectroscopic Characterization of Water Extractable Organic Matter from Thermally Altered Soils Reveal Insight into Disinfection Byproduct Precursors

Cawley

Hohner

Podgorski

et al. 2016

Environ. Sci. Technol.

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To characterize the effects of thermal-alteration on water extractable organic matter (WEOM), soil samples were heated in a laboratory at 225, 350, and 500 °C. Next, heated and unheated soils were leached, filtered, and analyzed for dissolved organic carbon (DOC) concentration, optical properties, molecular size distribution, molecular composition, and disinfection byproduct (DBP) formation following the addition of chlorine. The soils heated to 225 °C leached the greatest DOC and had the highest C- and N-DBP precursor reactivity per unit carbon compared to the unheated material or soils heated to 350 or 500 °C. The molecular weight of the soluble compounds decreased with increasing heating temperature. Compared to the unheated soil leachates, all DBP yields were higher for the leachates of soils heated to 225 °C. However, only haloacetonitrile yields (μg/mg) were higher for leachates of the soils heated to 350 °C, whereas trihalomethane, haloacetic acid and chloropicrin yields were lower compared to unheated soil leachates. Soluble N-containing compounds comprised a high number of molecular formulas for leachates of heated soils, which may explain the higher yield of haloacetonitriles for heated soil leachates. Overall, heating soils altered the quantity, quality, and reactivity of the WEOM pool. These results may be useful for inferring how thermal alteration of soil by wildfire can affect water quality.

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Section: Methodsmentioning

confidence: 99%

Molecular and Spectroscopic Characterization of Water Extractable Organic Matter from Thermally Altered Soils Reveal Insight into Disinfection Byproduct Precursors

Cawley

Hohner

Podgorski

et al. 2016

Environ. Sci. Technol.

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“…IM isolated from Athabasca bitumen was diluted to a final concentration of 250 μg mL –1 in 50:50 DCM/MeOH with 0.125% (v/v) TMAH solution. FT-ICR MS analyses were performed on a custom-built 9.4 T FT-ICR mass spectrometer described elsewhere. − Ions were introduced to the mass spectrometer through a dual-stage radio frequency (rf)-focusing ion funnel . Data acquisition was performed with a modular ICR data station (PREDATOR) …”

Section: Methodsmentioning

confidence: 99%

Effect of the Water Content on Silica Gel for the Isolation of Interfacial Material from Athabasca Bitumen

Clingenpeel

Robbins²,

Corilo³

et al. 2015

Energy Fuels

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The role of the water content adsorbed to silica gel for the selective isolation of petroleum interfacially active material was examined. Systematic variation of the amount of water adsorbed on the silica surface and its effect on retained petroleum species (interfacially active) revealed that gravimetric yields of isolated interfacial material (IM) were inversely proportional to the amount of water loaded onto the silica gel. However, with the exception of the water-saturated silica gel (66.6% water g −1 silica gel), all silica gels investigated (11.1−53.8% water g −1 silica gel) were stained after IM isolation, indicating that >53.8% water g −1 silica gel is required to prevent irreversible, oil−silica interactions. Moreover, emulsion stability tests reveal that IM isolated from the water-saturated silica gel (66.6% water g −1 silica gel) forms the most stable emulsion relative to IM isolated from the unsaturated silica gels. Molecular-level analysis of isolated IM fractions as a function of the silica water loading by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) exposes a gradual shift to a lower carbon number and double bond equivalents (DBE) in the interfacially active, O x S y , N 1 O x , and N 1 O x S 1 classes as a function of the increasing silica water content. The results suggest that lower carbon number/DBE, more surface-active compounds are isolated with the water-saturated silica gel. Conversely, IM O x species isolated with water saturated silica gel have similarly low carbon number ranges, but higher DBE, and occupy compositional space characteristic of asphaltenic species.

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“…The transmission efficiency of ions can be improved with these techniques. The ion beam can be radially confined more tightly by using a quadrupole ion guide (Chen et al, 2015). The radial expansion of the ion cloud is reduced.…”

Section: Introductionmentioning

confidence: 99%

Towards Higher Sensitivity of Mass Spectrometry: A Perspective From the Mass Analyzers

Li¹,

Chu²,

Tan³

et al. 2021

Front. Chem.

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Mass spectrometry (MS) is one of the most widely used analytical techniques in many fields. Recent developments in chemical and biological researches have drawn much attention to the measurement of substances with low abundances in samples. Continuous efforts have been made consequently to further improve the sensitivity of MS. Modifications on the mass analyzers of mass spectrometers offer a direct, universal and practical way to obtain higher sensitivity. This review provides a comprehensive overview of the latest developments in mass analyzers for the improvement of mass spectrometers’ sensitivity, including quadrupole, ion trap, time-of-flight (TOF) and Fourier transform ion cyclotron (FT-ICR), as well as different combinations of these mass analyzers. The advantages and limitations of different mass analyzers and their combinations are compared and discussed. This review provides guidance to the selection of suitable mass spectrometers in chemical and biological analytical applications. It is also beneficial to the development of novel mass spectrometers.

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Improved ion optics for introduction of ions into a 9.4-T Fourier transform ion cyclotron resonance mass spectrometer

Cited by 12 publications

References 28 publications

Molecular and Spectroscopic Characterization of Water Extractable Organic Matter from Thermally Altered Soils Reveal Insight into Disinfection Byproduct Precursors

Molecular and Spectroscopic Characterization of Water Extractable Organic Matter from Thermally Altered Soils Reveal Insight into Disinfection Byproduct Precursors

Effect of the Water Content on Silica Gel for the Isolation of Interfacial Material from Athabasca Bitumen

Towards Higher Sensitivity of Mass Spectrometry: A Perspective From the Mass Analyzers

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