Rapid Communications in Mass Spectrometry

article

Diet‐tissue discrimination factors and turnover of carbon and nitrogen stable isotopes in tissues of an adult predatory coral reef fish, Plectropomus leopardus

J. K. Matley, A. T. Fisk, A. J. Tobin, M. R. Heupel, more

Rapid Communications in Mass Spectrometry > 30 > 1 > 29 - 44

RationaleStable isotope ratios (δ¹³C and δ¹⁵N values) provide a unique perspective into the ecology of animals because the isotope ratio values of consumers reflect the values in food. Despite the value of stable isotopes in ecological studies, the lack of species‐specific experimentally derived diet‐tissue discrimination factors (DTDFs) and turnover rates limits their application at a broad scale...

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Diet‐tissue stable isotope (Δ¹³C and Δ¹⁵N) discrimination factors for multiple tissues from terrestrial reptiles

Ronnie Steinitz, Jeffrey M. Lemm, Stesha A. Pasachnik, Carolyn M. Kurle

Rapid Communications in Mass Spectrometry > 30 > 1 > 9 - 21

RationaleStable isotope analysis is a powerful tool for reconstructing trophic interactions to better understand drivers of community ecology. Taxon‐specific stable isotope discrimination factors contribute to the best use of this tool. We determined the first Δ¹³C and Δ¹⁵N values for Rock Iguanas (Cyclura spp.) to better understand isotopic fractionation and estimate wild reptile foraging ecology...

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Fragmentation study of aminoalcohol‐diterpenoid alkaloids by electrospray ionization time‐of‐flight mass spectrometry

Xiuxiu Liu, Minghai Tang, Lu Wang, Ruobing Chao

Rapid Communications in Mass Spectrometry > 30 > 1 > 161 - 169

RationaleAminoalcohol‐diterpenoid alkaloids were found to be a group of cardioactive substances in the lateral roots of Aconitum carmichaeli Debx. Studies on the fragmentation behaviors and features of these alkaloids in mass spectrometry would be important for their structural identification and in vivo metabolic research, which has not received much attention thus far. MethodsIn this study, the...

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Even‐electron [M–H]⁺ ions generated by loss of AgH from argentinated peptides with N‐terminal imine groups

Alexandra Plaviak, Sandra Osburn, Khiry Patterson, Michael J. Stipdonk

Rapid Communications in Mass Spectrometry > 30 > 1 > 69 - 80

RationaleExperiments were performed to probe the creation of apparent even‐electron, [M–H]⁺ ions by CID of Ag‐cationized peptides with N‐terminal imine groups (Schiff bases). MethodsImine‐modified peptides were prepared using condensation reactions with aldehydes. Ag⁺‐cationized precursors were generated by electrospray ionization (ESI). Tandem mass spectrometry (MSⁿ) and collision‐induced dissociation...

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Tandem mass spectrometry sequencing in the negative ion mode to read binary information encoded in sequence‐defined poly(alkoxyamine amide)s

Laurence Charles, Chloé Laure, Jean‐François Lutz, Raj Kumar Roy

Rapid Communications in Mass Spectrometry > 30 > 1 > 22 - 28

RationaleDigitally encoded oligomers composed of two distinct amide coding units spaced by a nitroxide moiety were recently decrypted using a tandem mass spectrometry (MS/MS) sequencing approach developed for protonated oligomers. Here, the MS/MS behavior of deprotonated oligomers was explored in the negative ion mode to provide both structural and mechanistic complementary information. MethodsBinary‐encoded...

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Laser desorption sample transfer for gas chromatography/mass spectrometry

Chinthaka A. Seneviratne, Suman Ghorai, Kermit K. Murray

Rapid Communications in Mass Spectrometry > 30 > 1 > 89 - 94

RationaleAmbient mass spectrometry can detect small molecules directly, but complex mixtures can be a challenge. We have developed a method that incorporates small molecule separation based on laser desorption with capture on a solid‐phase microextraction (SPME) fiber for injection into a gas chromatography/mass spectrometry (GC/MS) system. MethodsSamples on a metal target were desorbed by a 3 µm...

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Effects of a proton‐conducting ionic liquid on secondary ion formation in time‐of‐flight secondary ion mass spectrometry

Yukio Fujiwara, Naoaki Saito

Rapid Communications in Mass Spectrometry > 30 > 1 > 239 - 249

RationaleA protic ionic liquid, diethylmethylammonium trifluoromethanesulfonate ([dema][TfO]), has low vapor pressure and high protonic conductivity even at room temperature. Since [dema][TfO] has a mobile proton in its salt structure, its primary beam is expected to enhance the formation of protonated molecular ions. However, mass spectrometric characteristics of [dema][TfO] are not well known. In...

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Urea and lipid extraction treatment effects on δ¹⁵N and δ¹³C values in pelagic sharks

Yunkai Li, Yuying Zhang, Nigel E. Hussey, Xiaojie Dai

Rapid Communications in Mass Spectrometry > 30 > 1 > 1 - 8

RationaleStable isotope analysis (SIA) provides a powerful tool to investigate diverse ecological questions for marine species, but standardized values are required for comparative assessments. For elasmobranchs, their unique osmoregulatory strategy involves retention of ¹⁵N‐depleted urea in body tissues and this may bias δ¹⁵N values. This may be a particular problem for large predatory species, where...

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Apparent activation of H₂O and elimination of H₂ from gas‐phase mixed‐metal complexes containing silver, calcium and deprotonated glycine

Sandra Osburn, Alexandra Plaviak, Jordan Pestok, Michael J. Van Stipdonk

Rapid Communications in Mass Spectrometry > 30 > 1 > 101 - 111

RationaleIon trap mass spectrometry was used to study the reactivity of species derived from gas‐phase, mixed‐metal complexes, [Ag₂Xx(Gly‐H)₃]⁺, where Xx = Ca, Mg, Sr and Ag, and in particular the apparent activation of an H₂O ligand added during an ion‐molecule reaction. MethodsPrecursor [Ag₂Xx(Gly‐H)₃]⁺ complexes were formed by electrospray ionization (ESI) using spray solutions in which AgNO₃,...

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Identification of double‐bond positions in isomeric alkenones from a lacustrine haptophyte

James T. Dillon, William M. Longo, Yifan Zhang, Rafael Torozo, more

Rapid Communications in Mass Spectrometry > 30 > 1 > 112 - 118

RationaleMeasurements of alkenone unsaturation ratios are widely used for paleotemperature reconstructions in ocean and lake environments. Previously, we reported the discovery of a series of tri‐unsaturated alkenone positional isomers (Δ^{14, 21, 28}) from oligosaline and freshwater lakes in Greenland and Alaska. In this work we provide a detailed analysis of the structures and isotopic compositions...

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Electrospray ion mobility mass spectrometry of positively and negatively charged (1R,2S)‐dodecyl(2‐hydroxy‐1‐methyl‐2‐phenylethyl)dimethylammonium bromide aggregates

Serena Indelicato, David Bongiorno, Leopoldo Ceraulo, Valentina Calabrese, more

Rapid Communications in Mass Spectrometry > 30 > 1 > 230 - 238

RationaleSelf‐assembling processes of surfactants in the gas phase constitute a developing research field of interest since they allow information to be gained on the peculiar structural organization of these aggregates, on their ability to incorporate from small molecules up to proteins and on their possible use as carriers of drugs in the gas phase or as cleaning agents and exotic reaction media...

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Dissociation of protonated N‐(3‐phenyl‐2H‐chromen‐2‐ylidene)‐ benzenesulfonamide in the gas phase: cyclization via sulfonyl cation transfer

Shanshan Wang, Cheng Dong, Lian Yu, Cheng Guo, more

Rapid Communications in Mass Spectrometry > 30 > 1 > 95 - 100

RationaleIn the tandem mass spectrometry of protonated N‐(3‐phenyl‐2H‐chromen‐2‐ylidene)benzenesulfonamides, the precursor ions have been observed to undergo gas‐phase dissociation via two competing channels: (a) the predominant channel involves migration of the sulfonyl cation to the phenyl C atom and the subsequent loss of benzenesulfinic acid along with cyclization reaction, and (b) the minor one...

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Glycerol monoalkanediol diethers: a novel series of archaeal lipids detected in hydrothermal environments

Thorsten Bauersachs, Lorenz Schwark

Rapid Communications in Mass Spectrometry > 30 > 1 > 54 - 60

RationaleRecent advances in analytical techniques used to study archaeal membrane lipids have led to the identification of several novel di‐ and tetraether lipid structures. Here, we report the presence of a previously unknown series of archaeal diethers that have been detected exclusively in hydrothermally affected environments. MethodsPolar lipid extracts were analyzed using high‐performance liquid...

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Structures of polymeric pigments in red wine and their derived quantification markers revealed by high‐resolution quadrupole time‐of‐flight mass spectrometry

Liming Zeng, Pierre‐Louis Teissèdre, Michaël Jourdes

Rapid Communications in Mass Spectrometry > 30 > 1 > 81 - 88

RationaleThe quantification of polymeric pigment families in red wine through their derived quantification markers released during phloroglucinolysis will allow the understanding of their formation kinetics and evolutions during aging which has not been achieved until now and is in urgent need. The identification of these quantification markers was achieved by high‐resolution mass spectrometry (HRMS)...

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Coupling of size‐exclusion chromatography with electrospray ionization charge‐detection mass spectrometry for the characterization of synthetic polymers of ultra‐high molar mass

Arthur Viodé, Xavier Dagany, Michel Kerleroux, Philippe Dugourd, more

Rapid Communications in Mass Spectrometry > 30 > 1 > 132 - 136

RationaleCoupling size‐exclusion chromatography (SEC) with mass spectrometry (MS) allowed generation of a SEC calibration curve based on the analyte itself, which is more reliable than calibration based on non‐related standards and faster than the use of the multiple detection mode. However, such SEC/MS couplings were limited to rather small synthetic polymers. MethodsBased on the concept of image...

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Electrospray ionization tandem mass spectrometry analysis of isopimarane diterpenes from Velloziaceae

Angelo Cunha Pinto, Ricardo Vessecchi, Carmelita Gomes Silva, Ana Carolina Lourenço Amorim, more

Rapid Communications in Mass Spectrometry > 30 > 1 > 61 - 68

RationaleThe study of natural products by electrospray ionization tandem mass spectrometry (ESI‐MS/MS) is an important strategy for the characterization of the major fragmentation reactions which can then help to determine the composition of complex mixtures. Application of ESI‐MS/MS to a series of isopimarane diterpenes from Velloziaceae allowed the rationalization of their fragmentation mechanisms...

article

From mass to structure: an aromaticity index for high‐resolution mass data of natural organic matter

B. P. Koch, T. Dittmar

Rapid Communications in Mass Spectrometry > 30 > 1 > 250 - 250

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Variations in stable isotope ratios in lamb blood fractions following dietary changes: a preliminary study

L. Bontempo, F. Camin, L. Ziller, L. Biondi, more

Rapid Communications in Mass Spectrometry > 30 > 1 > 170 - 174

RationaleIn meat production it is common practice to use finishing diets based on concentrates, even for those animals previously raised on pasture. No studies have investigated the variations of stable isotope ratios in lamb plasma and erythrocytes, following a switch from pasture to a concentrate‐based diet during the last days before slaughter. For meat traceability it is important to verify how...

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Application of liquid chromatography/electrospray ionization ion trap tandem mass spectrometry for the evaluation of global nucleic acids: methylation in garden cress under exposure to CuO nanoparticles

Armando Alcazar Magana, Kazimierz Wrobel, Alma Rosa Corrales Escobosa, Katarzyna Wrobel

Rapid Communications in Mass Spectrometry > 30 > 1 > 209 - 220

RationaleA full understanding of the biological impact of nanomaterials demands analytical procedures suitable for the detection/quantification of epigenetic changes that occur in the exposed organisms. Here, the effect of CuO nanoparticles (NPs) on global methylation of nucleic acids in Lepidium sativum was evaluated by liquid chromatography/ion trap mass spectrometry. Enhanced selectivity toward...

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Total energy expenditure assessed by salivary doubly labelled water analysis and its relevance for short‐term energy balance in humans

Stefano Guidotti, Berthe M. A. A. A. Verstappen‐Dumoulin, Henk G. Jansen, Anita T. Aerts‐Bijma, more

Rapid Communications in Mass Spectrometry > 30 > 1 > 143 - 150

RationaleThe doubly labelled water (DLW) method is a stable isotopic technique for measuring total energy expenditure (TEE). Saliva is the easiest sampling fluid for assessing isotopic enrichments, but blood is considered superior because of its rapid exchange with body water. Therefore, we compared a large range of isotopic enrichments in saliva and blood, and related TEE in subjects with their ad libitum...

INFONA - science communication portal

Rapid Communications in Mass Spectrometry

Diet‐tissue discrimination factors and turnover of carbon and nitrogen stable isotopes in tissues of an adult predatory coral reef fish, Plectropomus leopardus

Diet‐tissue stable isotope (Δ¹³C and Δ¹⁵N) discrimination factors for multiple tissues from terrestrial reptiles

Fragmentation study of aminoalcohol‐diterpenoid alkaloids by electrospray ionization time‐of‐flight mass spectrometry

Even‐electron [M–H]⁺ ions generated by loss of AgH from argentinated peptides with N‐terminal imine groups

Tandem mass spectrometry sequencing in the negative ion mode to read binary information encoded in sequence‐defined poly(alkoxyamine amide)s

Laser desorption sample transfer for gas chromatography/mass spectrometry

Effects of a proton‐conducting ionic liquid on secondary ion formation in time‐of‐flight secondary ion mass spectrometry

Urea and lipid extraction treatment effects on δ¹⁵N and δ¹³C values in pelagic sharks

Apparent activation of H₂O and elimination of H₂ from gas‐phase mixed‐metal complexes containing silver, calcium and deprotonated glycine

Identification of double‐bond positions in isomeric alkenones from a lacustrine haptophyte

Electrospray ion mobility mass spectrometry of positively and negatively charged (1R,2S)‐dodecyl(2‐hydroxy‐1‐methyl‐2‐phenylethyl)dimethylammonium bromide aggregates

Dissociation of protonated N‐(3‐phenyl‐2H‐chromen‐2‐ylidene)‐ benzenesulfonamide in the gas phase: cyclization via sulfonyl cation transfer

Glycerol monoalkanediol diethers: a novel series of archaeal lipids detected in hydrothermal environments

Structures of polymeric pigments in red wine and their derived quantification markers revealed by high‐resolution quadrupole time‐of‐flight mass spectrometry

Coupling of size‐exclusion chromatography with electrospray ionization charge‐detection mass spectrometry for the characterization of synthetic polymers of ultra‐high molar mass

Electrospray ionization tandem mass spectrometry analysis of isopimarane diterpenes from Velloziaceae

From mass to structure: an aromaticity index for high‐resolution mass data of natural organic matter

Variations in stable isotope ratios in lamb blood fractions following dietary changes: a preliminary study

Application of liquid chromatography/electrospray ionization ion trap tandem mass spectrometry for the evaluation of global nucleic acids: methylation in garden cress under exposure to CuO nanoparticles

Total energy expenditure assessed by salivary doubly labelled water analysis and its relevance for short‐term energy balance in humans

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