My watch list  

1,498 Newest Publications about the topic spectrometers


You can refine your search further. Select from the filter options on the left to narrow down your results.

On the Origin of AMS “Cooking Organic Aerosol” at a Rural Site

18-Nov-2015 | M. Dall’Osto; M. Paglione; S. Decesari; M. C. Facchini; C. O’Dowd; Christian Plass-Duellmer; Roy M. Harrison, Environmental Science & Technology, 2015

A number of field observations employing aerosol mass spectrometers (AMS) have demonstrated that organic matter rich in monocarboxylic acids and aliphatic carbonyls originating from cooking activities (the COA factor) contributes significantly to ambient organic matter (OM) in urban environments. ...


Extracting Accurate Precursor Information for Tandem Mass Spectra by RawConverter

04-Nov-2015 | Lin He; Jolene Diedrich; Yen-Yin Chu; John R. Yates, III, Analytical Chemistry, 2015

Extraction of data from the proprietary RAW files generated by Thermo Fisher mass spectrometers is the primary step for subsequent data analysis. High resolution and high mass accuracy data obtained by state-of-the-art mass spectrometers (e.g., Orbitraps) can significantly improve both ...


Phenyl group participation in rearrangements during collision‐induced dissociation of deprotonated phenoxyacetic acid

29-Oct-2015 | Luc M. LeBlanc, Andrew M. J. Crowell, J. Stuart Grossert, Robert L. White, Rapid Communications in Mass Spectrometry, 2015

Rationale The identification of trace constituents in biological and environmental samples is frequently based on the fragmentation patterns resulting from the collision‐induced dissociation (CID) of gas‐phase ions. Credible mechanistic characterization of fragmentation processes, including ...


Real-time reaction monitoring by ultrafast 2D NMR on a benchtop spectrometer

21-Oct-2015 | Boris Gouilleux; Benoît Charrier; Ernesto Danieli; Jean-Nicolas Dumez; Serge Akoka; François-Xavier Felpin; Mireia R ..., Analyst, 2015

Reaction monitoring is widely used to follow chemical processes in a broad range of application fields. Recently, the development of robust benchtop NMR spectrometers has brought NMR under the fume hood, making it possible to monitor chemical reactions in a safe and accessible environment. ...


Miniature and Fieldable Mass Spectrometers: Recent Advances

21-Oct-2015 | Dalton T. Snyder; Christopher J. Pulliam; Zheng Ouyang; R. Graham Cooks, Analytical Chemistry, 2015

Analytical Chemistry DOI: 10.1021/acs.analchem.5b03070


Distinguishing isomeric aldohexose‐ketohexose disaccharides by electrospray ionization mass spectrometry in positive mode

15-Oct-2015 | Hang Yuan, Liu Liu, Jinping Gu, Yan Liu, Meijuan Fang, Yufen Zhao, Rapid Communications in Mass Spectrometry, 2015

Rationale The identification of the structure of carbohydrates is challenging because of their complex composition of monosaccharide units, linkage position and anomeric configuration. We used a combination of principle component analysis (PCA) and tandem mass spectrometry (MS/MS), including ...


Micro‐pulverized extraction pretreatment for highly sensitive analysis of 11‐nor‐9‐carboxy‐Δ9‐tetrahydrocannabinol in hair by liquid chromatography/tandem mass spectrometry

13-Oct-2015 | Kenji Kuwayama, Hajime Miyaguchi, Tadashi Yamamuro, Kenji Tsujikawa, Tatsuyuki Kanamori, Yuko T. Iwata, Hiroyuki Inoue, Rapid Communications in Mass Spectrometry, 2015

Rationale A primary metabolite of Δ9‐tetrahydrocannabinol, 11‐nor‐9‐carboxytetrahydrocannabinol (THC‐COOH), serves as an effective indicator for cannabis intake. According to the recommendations of the Society of Hair Testing, at least 0.2 pg/mg of THC‐COOH (cut‐off level) must be present in a ...


Illuminating the dark matter in metabolomics [Chemistry]

13-Oct-2015 | Ricardo R. da Silva; Pieter C. Dorrestein; Robert A. Quinn, Proceedings of the National Academy of Sciences current issue, 2015

Despite the over 100-y history of mass spectrometry, it remains challenging to link the large volume of known chemical structures to the data obtained with mass spectrometers. Presently, only 1.8% of spectra in an untargeted metabolomics experiment can be annotated. This means that the vast ...


Numerical modeling and experimental validation of a universal secondary electrospray ionization source for mass spectrometric gas analysis in real-time

12-Oct-2015 | Author(s): César Barrios-Collado, Guillermo Vidal-de-Miguel, Pablo Martinez-Lozano Sinues, Sensors and Actuators B: Chemical, 2015

Publication date: February 2016 Source:Sensors and Actuators B: Chemical, Volume 223 Author(s): César Barrios-Collado, Guillermo Vidal-de-Miguel, Pablo Martinez-Lozano Sinues The process by which ambient vapors are ionized upon interaction with electrosprays is not fully understood, ...


Raman spectroscopic detection for liquid and solid targets using a spatial heterodyne spectrometer

08-Oct-2015 | Guangxiao Hu, Wei Xiong, Hailiang Shi, Zhiwei Li, Jing Shen, Xuejing Fang, Journal of Raman Spectroscopy, 2015

Spatial heterodyne Raman spectroscopy (SHRS) is a new type of effective method for the analysis of structure and composition of liquid and solid targets with the characteristics of no moving parts, high spectral resolution, high optical throughput and large field of view. The technique is very ...


Page 1 From 150
Subscribe to e-mail updates relating to your search

You will receive via e-mail the latest search results matching your search criteria. This service is free of charge and can be cancelled at any time.

Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE