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1,458 Newest Publications about the topic spectrometers

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Applications of DART‐MS for food quality and safety assurance in food supply chain

14-May-2015 | Tianyang Guo, Wei Yong, Yong Jin, Liya Zhang, Jiahui Liu, Sai Wang, Qilong Chen, Yiyang Dong, Haijia Su, Tianwei Tan, Mass Spectrometry Reviews, 2015

Direct analysis in real time (DART) represents a new generation of ion source which is used for rapid ionization of small molecules under ambient conditions. The combination of DART and various mass spectrometers allows analyzing multiple food samples with simple or no sample treatment, or in ...

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Raman spectra of water in fluid inclusions: I. Effect of host mineral birefringence on salinity measurement

12-May-2015 | Marie‐Camille Caumon, Alexandre Tarantola, Régine Mosser‐Ruck, Journal of Raman Spectroscopy, 2015

Raman microspectrometry of water in individual aqueous fluid inclusions can provide chemical information about fluid composition, in particular the concentration of chloride ions. The regular method consists in correlating the deformation of the OH stretching vibration band of liquid water in ...

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Fully Resolved NMR Correlation Spectroscopy

04-May-2015 | Daisy Pitoux, Bertrand Plainchont, Denis Merlet, Zhaoyu Hu, David Bonnaffé, Jonathan Farjon, Nicolas Giraud, Chemistry - A European Journal, 2015

Abstract A new correlation experiment cited as “push‐G‐SERF” is reported. In the resulting phased 2D spectrum, the chemical shift information is selected along the direct dimension, whereas scalar couplings involving a selected proton nucleus are edited in the indirect domain. The robustness ...

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Chemical Characterization of Pyrolysis Bio-oil: Application of Orbitrap Mass Spectrometry

04-May-2015 | Martin Staš; Josef Chudoba; David Kubička; Milan Pospíšil, Energy & Fuels, 2015

Pyrolysis bio-oil is a liquid product of the pyrolysis of biomass. After appropriate upgrading, it can be used as biofuel or as a source of valuable chemicals. To optimize a pyrolysis process, a detailed understanding of the chemical composition of bio-oils is necessary. Nonvolatile and ...

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Feasibility study of ED‐XRF analysis of atmospheric particulate matter samples collected with high time resolution

28-Apr-2015 | M. Giannoni, G. Calzolai, M. Chiari, F. Lucarelli, A. Mazzinghi, S. Nava, C. Ruberto, X-Ray Spectrometry, 2015

This study aims at verifying the feasibility of the analysis of particulate matter samples collected with hourly time resolution by a Streaker sampler device, using cheaper and more affordable instrumentations like energy dispersive X‐ray fluorescence (ED‐XRF) spectrometers. The ‘hourly’ samples ...

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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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Improved analysis of ultra‐high molecular mass polystyrenes in matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry using DCTB matrix and caesium salts

21-Apr-2015 | S. J. Gabriel, R. F. Steinhoff, M. Pabst, C. Schwarzinger, R. Zenobi, U. Panne, S. M. Weidner, Rapid Communications in Mass Spectrometry, 2015

Rationale The ionization of polystyrenes in matrix‐assisted laser desorption/ionization mass spectrometry (MALDI‐MS) is typically achieved by the use of silver salts. Since silver salts can cause severe problems, such as cluster formation, fragmentation of polymer chains and end group ...

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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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The Atomic, Molecular and Optical Science instrument at the Linac Coherent Light Source

16-Apr-2015 | Ken R. Ferguson, Maximilian Bucher, John D. Bozek, Sebastian Carron, Jean‐Charles Castagna, Ryan Coffee, G. Ivan Cur ..., Journal of Synchrotron Radiation, 2015

The Atomic, Molecular and Optical Science (AMO) instrument at the Linac Coherent Light Source (LCLS) provides a tight soft X‐ray focus into one of three experimental endstations. The flexible instrument design is optimized for studying a wide variety of phenomena requiring peak intensity. There ...

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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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