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1,446 Newest Publications about the topic spectrometers

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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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In crystallo optical spectroscopy (icOS) as a complementary tool on the macromolecular crystallography beamlines of the ESRF

23-Jan-2015 | David von Stetten, Thierry Giraud, Philippe Carpentier, Franc Sever, Maxime Terrien, Fabien Dobias, Douglas H. Juers ..., Acta Crystallographica Section D, 2015

The analysis of structural data obtained by X‐ray crystallography benefits from information obtained from complementary techniques, especially as applied to the crystals themselves. As a consequence, optical spectroscopies in structural biology have become instrumental in assessing the relevance ...

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Negative electrospray ionization mass spectrometry: a method for sequencing and determining linkage position in oligosaccharides from branched hemicelluloses

19-Jan-2015 | Bernard Quéméner, Jacqueline Vigouroux, Estelle Rathahao, Jean Claude Tabet, Aleksandra Dimitrijevic, Marc Lahaye, Journal of Mass Spectrometry, 2015

Xyloglucans of apple, tomato, bilberry and tamarind were hydrolyzed by commercial endo β‐1‐4‐D‐endoglucanase. The xylo‐gluco‐oligosaccharides (XylGos) released were separated on CarboPac PA 200 column in less than 15 min, and, after purification, they were structurally characterized by negative ...

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Portable FTIR analyzers for the rapid determination of total trans fat

15-Jan-2015 | Magdi M. Mossoba, Cynthia T. Srigley, John K.G. Kramer, Lipid Technology, 2015

Mid‐infrared spectroscopy (MIS) has been a particularly valuable, rapid analytical tool because it provides the total trans fat content of lipids in a single measurement. In recent years, portable Fourier transform infrared (FTIR) analyzers, which are most useful for field laboratories, have ...

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Photolytic determination of charge state for large proteins and fragments in an ion trap mass spectrometer

13-Jan-2015 | Yana A. Lyon, Ryan R. Julian, Rapid Communications in Mass Spectrometry, 2015

Rationale One of the major shortcomings of linear ion trap mass spectrometers is poor resolution. Failure to resolve isotopic peaks makes charge state determination for large proteins very difficult, hindering the ability to perform top‐down proteomics. Methods Peptides, proteins and ...

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Method development for the determination of chromium and thallium in fertilizer samples using graphite furnace atomic absorption spectrometry and direct solid sample analysis

04-Jan-2015 | Author(s): Aline R. Borges , Luciane L. François , Emilene M. Becker , Maria Goreti R. Vale , Bernhard Welz, Microchemical Journal, 2015

Publication date: March 2015 Source:Microchemical Journal, Volume 119 Author(s): Aline R. Borges , Luciane L. François , Emilene M. Becker , Maria Goreti R. Vale , Bernhard Welz A method has been developed for the determination of chromium and thallium in fertilizer samples using line ...

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