Results 111 to 120 of about 105,676 (166)

The carbon isotope ratio of breath is elevated by short-term and long-term added sugar and animal protein intake in a controlled feeding study. [PDF]

Am J Clin Nutr
O'Brien DM, Freedman LS, Rivera P, Merriman S, Sági-Kiss V, Palma-Duran SA, Barrett B, Commins J, Kipnis V, Tasevska N.   +9 more
europepmc   +1 more source

Comparison of Carbon Isotope Ratio Measurement of the Vanillin Methoxy Group by GC-IRMS and ¹³C-qNMR. [PDF]

J Am Soc Mass Spectrom
Greule M, Le PM, Meija J, Mester Z, Keppler F.   +4 more
europepmc   +1 more source

Using stable oxygen isotope dual-inlet isotope-ratio mass spectrometry to elucidate uranium transport and mixed ²³⁰Th/U calcite formation ages at the seminal Devils Hole, Nevada, natural laboratory. [PDF]

Rapid Commun Mass Spectrom
Coplen TB, Seal RR, Reid LT, Jordan JA, Mumford AC.   +4 more
europepmc   +1 more source

An optimized method for extraction and purification of inorganic phosphate from plant material for oxygen isotope ratio analysis. [PDF]

MethodsX
Rieckmann MM, Blake RE, Chang SJ, Laursen KH.   +3 more
europepmc   +1 more source

Correction: Fadil et al. Isotope Ratio Outlier Analysis (IROA) for HPLC-TOFMS-Based Metabolomics of Human Urine. Metabolites 2022, 12, 741. [PDF]

Metabolites
Fadil F, Samol C, Berger RS, Kellermeier F, Gronwald W, Oefner PJ, Dettmer K.   +6 more
europepmc   +1 more source

Improved organic and pesticide-free rice (Oryza sativa L.) authentication based on multiple stable isotope ratio analysis and rice milling state. [PDF]

Heliyon
Chi HY, Kim WR, Kim JY, Kim SH.
europepmc   +1 more source

Authentication of Fennel, Star Anise, and Anise Essential Oils by Gas Chromatography (GC/MS) and Stable Isotope Ratio (GC/IRMS) Analyses. [PDF]

Plants (Basel)
Murphy BJ, Wilson TM, Ziebarth EA, Bowerbank CR, Carlson RE.   +4 more
europepmc   +1 more source

High-Density Balsamic Vinegar: Application of Stable Isotope Ratio Analysis to Determine Watering Down. [PDF]

J Agric Food Chem
Perini M, Pianezze S, Paolini M, Larcher R.   +3 more
europepmc   +1 more source

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Isotope‐ratio detection for gas chromatography

Journal of Separation Science, 2006
AbstractInstrumentation and methods exist for highly precise analyses of the stable‐isotopic composition of organic compounds separated by GC. The general approach combines a conventional GC, a chemical reaction interface, and a specialized isotope‐ratio mass spectrometer (IRMS).
Alex L Sessions
openaire   +5 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
openaire   +2 more sources