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Showing papers in "International Journal of Mass Spectrometry in 2010"


Journal ArticleDOI
TL;DR: In this article, a combined procedure for separating Lu, Hf, Rb, Sr, Sm and Nd from a single sample digestion is presented, and the results show good agreement with previously reported values by isotope dilution methods.

331 citations


Journal ArticleDOI
TL;DR: A mass spectrometer interface for planar geometries is constructed that takes advantage of atmospheric pressure gas dynamic principles, rather than ion focusing, to minimize ion losses from diffusion in the analyzer and to maximize total ion transport into the mass spectromaeter.

166 citations


Journal ArticleDOI
TL;DR: In this article, a high resolution ion mobility time-of-flight mass spectrometer with electrospray ionization source (ESI-IM-MS) was evaluated as an analytical method for rapid analysis of complex biological samples such as human blood metabolome.

155 citations


Journal ArticleDOI
TL;DR: Ion mobility techniques, using both traveling wave-based technology and standard drift tube methods, along with molecular modeling were used to examine the gas-phase conformational properties of a series of isomeric oligosaccharides and hydrazine-released N-linked glycans from various sources as mentioned in this paper.

127 citations


Journal ArticleDOI
TL;DR: In this paper, the n(238U)/n(235U) isotope ratio of the NBL CRM 112a standard has been re-measured in a collaborative effort by several geochemistry laboratories and the Institute for Reference Materials and Measurements.

107 citations


Journal ArticleDOI
TL;DR: In this article, a two-dimensional differential mobility analyzer (DMA)-MS spectra of multiply charged clusters formed in electrosprays of concentrated solutions of tetrahexylammonium bromide (A+Br−) were obtained.

107 citations


Journal ArticleDOI
TL;DR: In this paper, the authors show that the mass accuracy obtained by a commercial apparatus can be improved by proper data analysis, which allows for a mass accuracy that suffices for elemental determination in the most common situations.

103 citations


Journal ArticleDOI
TL;DR: In this article, the effect of TWIMS wave height parameters on the calibration is addressed by comparison of theoretical collision cross-sections calculated using helium and nitrogen radii with TWIMs-MS cross-section measurements determined in either helium or nitrogen buffer gases.

94 citations


Journal ArticleDOI
TL;DR: In this article, the authors present a study into a mode of operation of the travelling wave mobility separator which enables direct determination of mobility and hence collision cross-section (CCS) values.

86 citations


Journal ArticleDOI
TL;DR: In this article, the dependence of ion signal intensities on laser fluence was investigated for MALDI imaging mass spectrometry at high spatial resolution (optical focus diameters in the range of 1.1-8.4μm).

83 citations


Journal ArticleDOI
Yun Zhang1, Hao Chen1
TL;DR: Chen et al. as mentioned in this paper reported an improved method that employs modified phenylboronic acids including 3-nitrophenylbornic acid and N-methyl-4-pyridineboronic acid iodide.

Journal ArticleDOI
TL;DR: In this article, the authors used ion mobility-mass spectrometry to investigate the effects of aqueous buffer removal on the structure of an archetypal ring complex, GroEL.

Journal ArticleDOI
TL;DR: In this article, the IRMPD action spectra of cationized cysteine (Cys) were examined by infrared multiple photon dissociation (IRMPD) action spectroscopy utilizing light generated by a free electron laser, in conjunction with quantum-chemical calculations.

Journal ArticleDOI
TL;DR: In this article, two proton transfer reaction time-of-flight mass spectrometers (Ionicon Analytik) have been used to identify solid explosives (RDX, TNT, HMX, PETN and Semtex A).

Journal ArticleDOI
TL;DR: In this article, a modified isotope dilution mass spectrometry (IDMS) technique was used for the experimental determination of absolute isotopic abundances using a virtual element consisting of all isotopes but the one having the largest or smallest abundance.

Journal ArticleDOI
TL;DR: In this article, the state of the art of bioimaging of metals in thin brain tissue sections by LA-ICP-MS with spatial resolution at the micrometre scale and prospects for developing quantitative techniques at nanometre range.

Journal ArticleDOI
TL;DR: In this paper, the stability of the salt bridge (SB; zwitterionic) conformer relative to the most stable canonical structure with a single formal charge site (charge solvation; CS) of aliphatic amino acids (e.g., Pro, Na+, K+, Rb+, and Cs+) was investigated using IRMPD spectroscopy utilizing light generated by a free electron laser and computational modeling.

Journal ArticleDOI
TL;DR: In this article, a high resolution ion mobility spectrometer (HRIMS) equipped with an electrospray ionization (ESI) source was used to analyze trace levels of several energetic materials.

Journal ArticleDOI
TL;DR: In this paper, the GUM (guide to the expression of Uncertainty in Measurement) approach is used to calculate standard uncertainties for routine uranium isotope mass spectrometry measurements for nuclear safeguards and nuclear metrology.

Journal ArticleDOI
TL;DR: In this article, the authors investigated the effects of E / N over the range of 90 −140 Td on the product ions resulting from the reactions of H 3 O + with 12 saturated alcohols using a proton transfer reaction mass spectrometer (PTR-MS).

Journal ArticleDOI
TL;DR: In this paper, the absolute photoionization cross-sections of 12 oxygenated hydrocarbons were measured in the photon energy range from respective ionization thresholds to 11.5 eV.

Journal ArticleDOI
TL;DR: Differential mobility ion filters preselect specific ions and suppress chemical noise created in typical atmospheric-pressure ionization sources (ESI, MALDI, and others) as discussed by the authors, which is based on the field dependence of ion mobility, which, in turn, depends on ion characteristics that include conformation, charge distribution, molecular polarizability, and other properties.

Journal ArticleDOI
TL;DR: In this paper, a new methodology for the precise determination of bromine isotope ratio in individual organic compounds based on the simultaneous introduction of Brominated organic compounds and strontium as an external spike into MC-ICPMS was presented.

Journal ArticleDOI
TL;DR: In this paper, the reaction rate coefficients between VOCs and the hydronium ion have been calculated in the context of Proton Transfer Reaction Mass Spectrometer (PTR-MS).

Journal ArticleDOI
TL;DR: In this article, a procedure is described to prepare SI-traceable argon isotope amount ratios in high purity argon using a gravimetric approach, and a total of three synthetic isotope mixtures have been prepared, from argon gases enriched in (36)Ar, (38)Ar and (40)Ar.

Journal ArticleDOI
TL;DR: In this paper, the exact analytical equation for the Avogadro constant was given via exact analytical equations for a three-isotope system and the conditions ensuring the existence and uniqueness of the calibration-equation solutions were related.

Journal ArticleDOI
TL;DR: In this paper, the IRMPD action spectra of six sodium cationized complexes of uracil and five thiouracils were examined via infrared multiple photon dissociation (IRMPD) action spectroscopy and theoretical electronic structure calculations.

Journal ArticleDOI
TL;DR: In this paper, the first measurements of absolute cross-sections for near-threshold molecular and dissociative photoionization are presented for 11 small esters (methyl formate, ethyl formate and vinyl acetate) using a monochromated VUV synchrotron light source.

Journal ArticleDOI
TL;DR: In this article, the interaction of halide anions (Cl-, Br-, and I-) with glutamic acid (Glu), histidine (His), and arginine (Arg) was investigated using infrared multiple photon dissociation (IRMPD) spectroscopy between 850 and 1900 cm(-1) and hybrid density functional theory.

Journal ArticleDOI
TL;DR: Ion-helium collision cross sections (CCS) for peptide, small protein, and peptide/protein ionic complexes are reported and calculated structures obtained by using a protein-protein structure algorithm generator, based on a combined Biomolecular complex Generation with Global Evaluation and Ranking and Multi Dimensional Scaling.