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1,451 Newest Publications about the topic spectrometers

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Detection Limits of Organic Compounds Achievable with Intense, Short-Pulse Lasers

22-Apr-2015 | Jordan Miles; Simone De Camillis; Grace Alexander; Kathryn Hamilton; Thomas Kelly; John Costello; Matthew Zepf; Ian ..., Analyst, 2015

Many organic molecules have strong absorption bands which can be accessed by ultraviolet short pulse lasers to produce efficient ionization. This resonant multiphoton ionization scheme has already been exploited as an ionization source in time-of-flight mass spectrometers used for environmental ...

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High-Throughput Characterization of Small and Large Molecules Using Only a Matrix and the Vacuum of a Mass Spectrometer

17-Apr-2015 | Daniel W. Woodall; Beixi Wang; Ellen D. Inutan; Srinivas B. Narayan; Sarah Trimpin, Analytical Chemistry, 2015

Matrix assisted ionization vacuum (MAIV) rapidly generates gas-phase analyte ions from subliming solid-phase matrix:analyte crystals for analysis by mass spectrometry (MS). Ionization from the solid-phase allows the use of a variety of surfaces for introducing matrix:analyte samples to the vacuum ...

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Sensors, Vol. 15, Pages 8931-8944: A Reliable and Simple Method for Fabricating a Poly(Dimethylsiloxane) Electrospray Ionization Chip with a Corner-Integrated Emitter

16-Apr-2015 | Qian, Xiang ; Xu, Jie ; Yu, Cilong ; Chen, Yan ; Yu, Quan ; Ni, Kai ; Wang, Xiaohao, Sensors, 2015

Monolithically integrated emitters have been increasingly applied to microfluidic devices that are coupled to mass spectrometers (MS) as electrospray ionization sources (ESI). A new method was developed to fabricate a duplicable structure which integrated the emitter into a poly(dimethylsiloxane) ...

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Complementing reversed-phase selectivity with porous graphitized carbon to increase the metabolome coverage in an on-line two-dimensional LC-MS setup for metabolomics

08-Apr-2015 | Karin Ortmayr; Stephan Hann; Gunda Koellensperger, Analyst, 2015

Efficient and robust separation methods are indispensable in modern LC-MS based metabolomics, where high-resolution mass spectrometers are challenged by isomeric and isobaric metabolites. The optimization of chromatographic separation hence remains an invaluable tool in the comprehensive analysis ...

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Systematic evaluation of label‐free and super‐SILAC quantification for proteome expression analysis

25-Mar-2015 | Andreas Tebbe, Martin Klammer, Stefanie Sighart, Christoph Schaab, Henrik Daub, Rapid Communications in Mass Spectrometry, 2015

Rationale Advanced implementations of mass spectrometry (MS)‐based proteomics allow for comprehensive proteome expression profiling across many biological samples. The outcome of such studies critically depends on accurate and precise quantification, which has to be ensured for high‐coverage ...

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Synthesis and hydrolysis of gas-phase lanthanide and actinide oxide nitrate complexes: a correspondence to trivalent metal ion redox potentials and ionization energies

24-Mar-2015 | Ana F. Lucena; Célia Lourenço; Maria C. Michelini; Philip X. Rutkowski; José M. Carretas; Nicole Zorz; Laurence Bert ..., Physical Chemistry Chemical Physics, 2015

Several lanthanide and actinide tetranitrate ions, MIII(NO3)4−, were produced by electrospray ionization and subjected to collision induced dissociation in quadrupole ion trap mass spectrometers. The nature of the MO(NO3)3− products that result from NO2 elimination was evaluated by measuring the ...

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Differentiation of enantiomers by 2D NMR spectroscopy at 1 T using residual dipolar couplings

14-Mar-2015 | Martin R. M. Koos, Ernesto Danieli, Federico Casanova, Bernhard Blümich, Burkhard Luy, Magnetic Resonance in Chemistry, 2015

Differentiating enantiomers using 2D bench‐top NMR spectroscopy. Spectrometers working with permanent magnets at 1 T field strength allow the acquisition of 2D data sets. In conjunction with previously reported chiral alignment media, this setup allows the measurement of enantiomeric excess via ...

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Avoiding misidentification of bands in planetary Raman spectra

05-Mar-2015 | Liam V. Harris, Melissa McHugh, Ian B. Hutchinson, Richard Ingley, Cédric Malherbe, John Parnell, Alison Olcott Mars ..., Journal of Raman Spectroscopy, 2015

Raman spectroscopy has been identified as a powerful tool for astrobiology and remote robotic planetary exploration. It can be used to identify and characterise rock matrices, mineral inclusions and organic molecules and is demonstrably effective at identifying biomarkers, or indicators of ...

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A Microelectromechanical Systems-Enabled, Miniature Triple Quadrupole Mass Spectrometer

02-Mar-2015 | Steven Wright; Andrew Malcolm; Christopher Wright; Shane O’Prey; Edward Crichton; Neil Dash; Richard W. Moseley; Woj ..., Analytical Chemistry, 2015

Miniaturized mass spectrometers are becoming increasingly capable, enabling the development of many novel field and laboratory applications. However, to date, triple quadrupole tandem mass spectrometers, the workhorses of quantitative analysis, have not been significantly reduced in size. Here, ...

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An online temperature‐controlled vacuum‐equilibration preparation system for the measurement of δ2H values of non‐exchangeable‐H and of δ18O values in organic materials by isotope‐ratio mass spectrometry

28-Jan-2015 | Leonard I. Wassenaar, Keith A. Hobson, Leonardo Sisti, Rapid Communications in Mass Spectrometry, 2015

Rationale Measurement of δ2H values in non‐exchangeable‐H (δ2Hn) and δ18O values in organic environmental samples are inconsistent among laboratories worldwide due to varied and lengthy approaches in controlling for H isotope exchange (for δ2Hn values) and removal of trace moisture (δ2Hn and ...

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