Rapid Communications in Mass Spectrometry

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Characterization of high molecular weight macrocycles by desorption chemical ionization mass spectrometry
Rapid Communications in Mass Spectrometry - Tập 3 Số 4 - Trang 106-109 - 1989
Gianfranco Guglielmetti, Enrico Dalcanale, Stefanio Bonsignore, Marco Vincenti, Kenneth L. Busch
AbstractA series of multi‐armed macrocycles with molecular weights up to 4400 Da was studied by desorption chemical ionization. Both negative‐ and positive‐ion spectra exhibited excellent signal‐to‐noise ratio, despite the limited amount of material sampled (0.1–1 pmol). The molecular ions generally represent the base peaks of the spectra, but the extent of fragmen...... hiện toàn bộ
Aromatic hydrocarbon derivatives of fullerences
Rapid Communications in Mass Spectrometry - Tập 5 Số 10 - Trang 472-474 - 1991
Steven H. Hoke, Jay Molstad, Gregory L. Payne, Robert J. Cotter, Bart Kahr, Dor Ben‐Amotz, R. Graham Cooks
AbstractThe fullerences C60 and C70 form adducts with toluene, p‐xylene and other aromatic compounds when refluxed in these solvents in the presences of FeCl3. Benzene derivatives are produced only when bromine is also present. Mass spectra of the reaction mixtures indicate the presence of derivatives i...... hiện toàn bộ
Development of a multi‐target screening analysis for 301 drugs using a QTrap liquid chromatography/tandem mass spectrometry system and automated library searching
Rapid Communications in Mass Spectrometry - Tập 19 Số 10 - Trang 1332-1338 - 2005
Christoph Mueller, Wolfgang Weinmann, Sebastian Dresen, André Schreiber, Merja Gergov
AbstractA new multi‐target screening (MTS) procedure for drugs in blood and urine for toxicological analysis has been developed using a hybrid triple‐quadrupole linear ion trap mass spectrometer (QTrap) for the fast detection and identification of 301 forensically important drugs, e.g. tranquilizers (benzodiazepines), hypnotics, drugs of abuse (opiates, cocaine, am...... hiện toàn bộ
Enhancements in travelling wave ion mobility resolution
Rapid Communications in Mass Spectrometry - Tập 25 Số 11 - Trang 1559-1566 - 2011
Kevin Giles, Jonathan P. Williams, Iain D. G. Campuzano
The use of ion mobility separation to determine the collision cross‐section of a gas‐phase ion can provide valuable structural information. The introduction of travelling‐wave ion mobility within a quadrupole/time‐of‐flight mass spectrometer has afforded routine collision cross‐section measurements to be performed on a range of ionic species differing in gas‐phase size/structure and molecu...... hiện toàn bộ
Travelling wave ion mobility mass spectrometry of 5‐aminolaevulinic acid, porphobilinogen and porphyrins
Rapid Communications in Mass Spectrometry - Tập 26 Số 4 - Trang 480-486 - 2012
Christopher M. Benton, Chang Kee Lim, Caje Moniz, Donald J. L. Jones
RATIONALEHuman porphyrias, diseases caused by enzyme defects in haem biosynthesis, are characterised by the excessive production, accumulation and excretion of porphyrins and/or 5‐aminolaevulinic acid (ALA) and porphobilinogen (PBG). A method for the simultaneous separation, detection and identification of ALA, PBG and porphyrins would greatly facilitate ...... hiện toàn bộ
Isotope effects associated with the preparation and methylation of fatty acids by boron trifluoride in methanol for compound‐specific stable hydrogen isotope analysis via gas chromatography/thermal conversion/isotope ratio mass spectrometry
Rapid Communications in Mass Spectrometry - Tập 26 Số 10 - Trang 1232-1240 - 2012
David Chivall, Robert Berstan, Ian D. Bull, Richard P. Evershed
RATIONALECompound‐specific stable hydrogen isotope analysis of fatty acids is being used increasingly as a means of deriving information from a diverse range of materials of archaeological, geological and environmental interest. Preparative steps required prior to isotope ratio mass spectrometry (IRMS) analysis have the potential to alter determined δD va...... hiện toàn bộ
Mass spectrometric analysis of the individual variability of Bothrops jararaca venom peptide fraction. Evidence for sex‐based variation among the bradykinin‐potentiating peptides
Rapid Communications in Mass Spectrometry - Tập 21 Số 6 - Trang 1034-1042 - 2007
Daniel C. Pimenta, Benedito C. Prezoto, Katsuhiro Konno, Robson L. Melo, Maria F. Furtado, Antônio Carlos Martins de Camargo, Solange M.T. Serrano
AbstractVariation in the snake venom proteome is well documented and it is a ubiquitous phenomenon at all taxonomical levels. However, variation in the snake venom peptidome is so far not described. In this work we used mass spectrometry [liquid chromatography/mass spectrometry (LC/MS) and matrix‐assisted laser desorption/ionization time‐of‐flight (MALDI‐TOFMS)] to...... hiện toàn bộ
Solid‐phase permethylation of glycans for mass spectrometric analysis
Rapid Communications in Mass Spectrometry - Tập 19 Số 23 - Trang 3421-3428 - 2005
Pilsoo Kang, Yehia Mechref, Iveta Kloučková, Miloš V. Novotný
AbstractA miniaturized approach was developed for quantitative permethylation of oligosaccharides, which involves packing of sodium hydroxide powder in microspin columns or fused‐silica capillaries (500 µm i.d.), permitting effective derivatization in less than a minute at microscale. Prior to mass spectrometry, analytes are mixed with methyl iodide in dimethyl sul...... hiện toàn bộ
Distinguishing wild ruminant lipids by gas chromatography/combustion/isotope ratio mass spectrometry
Rapid Communications in Mass Spectrometry - Tập 26 Số 19 - Trang 2359-2364 - 2012
Oliver E. Craig, Richard Allen, Anu Thompson, Rhiannon E. Stevens, Valerie J. Steele, Carl Heron
RATIONALEThe carbon isotopic characterisation of ruminant lipids associated with ceramic vessels has been crucial for elucidating the origins and changing nature of pastoral economies. δ13C values of fatty acids extracted from potsherds are commonly compared with those from the dairy and carcass fats of modern domesticated animals to ...... hiện toàn bộ
Development of a liquid chromatography/tandem mass spectrometry method for the simultaneous determination of 16 mycotoxins on cellulose filters and in fungal cultures
Rapid Communications in Mass Spectrometry - Tập 20 Số 5 - Trang 771-776 - 2006
Barbara Delmulle, Sarah De Saeger, A. Adams, Norbert De Kimpe, Carlos Van Peteghem
AbstractThe development of a liquid chromatography/tandem mass spectrometry (LC/MS/MS) method for the simultaneous determination of 16 mycotoxins possibly related to the ‘Sick Building Syndrome’ on filters and in fungal cultures is described. Fungi‐surface sampling as regards the ‘Sick Building Syndrome’ preferably happens by scraping off fungal material and vacuum...... hiện toàn bộ
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