Results 191 to 200 of about 57,277 (241)

Toward diagnostically relevant isotope-ratio biomarkers: what does MC-ICP-MS still need for standardized measurements? [PDF]

Anal Bioanal Chem
Ramirez DA, Meermann B.
europepmc   +1 more source

Isotope Decluttering Reduces Spectral Complexity while Maintaining Protein Structure. [PDF]

Anal Chem
Hakke SS, Noteborn WEM, Cabukusta B, Gao Y, Knoops K, López-Iglesias C, Kilgour DPA, Clarke DJ, Mathew A, Heeren RMA.   +9 more
europepmc   +1 more source

Methodological Development and Theoretical Framework for the Isotopic Analysis of Mass Spectral Fragments of Phytol Using Orbitrap Mass Spectrometry. [PDF]

ACS Omega
Tomečková Öztoprak M, van der Meer MTJ, Hopmans EC, Villanueva L, Schouten S.   +4 more
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δ¹³C and δ¹⁵N Values of Residues Provide Insights Into Identification of the Explosive Source. [PDF]

Rapid Commun Mass Spectrom
Ehleringer JR, Howa JD.
europepmc   +1 more source

Establishment of a Purge and Trap Continuous-Flow Isotope Ratio Mass Spectrometer System for Analysis of Stable Nitrate Isotopes (δ¹⁵N and δ¹⁸O) in Water Samples by Ti(III) Reduction. [PDF]

Rapid Commun Mass Spectrom
Gcakasi MN, Stumpp C, Watzinger A.
europepmc   +1 more source

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Applied gas chromatography coupled to isotope ratio mass spectrometry

Journal of Chromatography A, 1999
Compound-specific isotope analysis (CSIA) by isotope ratio mass spectrometry (IRMS) following on-line combustion (C) of compounds separated by gas chromatography (GC) is a relatively young analytical method. Due to its ability to measure isotope distribution at natural abundance level with great accuracy and high precision, GC-C-IRMS has increasingly ...
Wolfram Meier-Augenstein
exaly   +3 more sources

High Precision Isotope Ratio Monitoring Techniques in Mass Spectrometry

Journal of Mass Spectrometry, 1996
Isotope ratio monitoring following on-line combustion is a new method in gas chromatography/mass spectrometry (GC/MS) that allows the ratios of abundances of stable isotopes of elements such as carbon and nitrogen to be determined for individual compounds introduced via a gas chromatograph.
Willi A Brand
exaly   +3 more sources

Optical isotope ratio spectroscopy – complementing isotope ratio mass spectrometry

OSA Optical Sensors and Sensing Congress 2021 (AIS, FTS, HISE, SENSORS, ES), 2021
Isotope ratio measurements and scale definitions are typically related to mass specectroscopy. This work discusses the challenges of optical isotope ratio spectroscopy and its prospects to significantly complement isotope ratio mass spectrometry.
Braden-Behrens, Jelka, Meuzelaar, Heleen, Mohn, Joachim, Nwaboh, Javis A., Persijn, Stefan, Rolle, Francesca, Sega, Michela, Steur, Pharahilda M., Wacker, Lars, Zeyer, Kerstin, Werhahn, Olav, Ebert, Volker   +11 more
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Isotope ratio mass spectrometry

The Analyst, 2009
Isotope Ratio Mass Spectrometry (IRMS) is a specialized technique used to provide information about the geographic, chemical, and biological origins of substances. The ability to determine the source of an organic substance stems from the relative isotopic abundances of the elements which comprise the material.
Zeland, Muccio, Glen P, Jackson
openaire   +2 more sources

Isotope ratio monitoring gas chromatography/Mass spectrometry of D/H by high temperature conversion isotope ratio mass spectrometry

Rapid Communications in Mass Spectrometry, 1999
Of all the elements, hydrogen has the largest naturally occurring variations in the ratio of its stable isotopes (D/H). It is for this reason that there has been a strong desire to add hydrogen to the list of elements amenable to isotope ratio monitoring gas chromatography/mass spectrometry (irm-GC/MS). In irm-GC/MS the sample is entrained in helium as
Hilkert, A., Douthitt, C., Schlüter, H., Brand, W.   +3 more
openaire   +3 more sources