Results 191 to 200 of about 57,188 (237)

Nickel Wall-coated Microreactors for Enhanced Sensitivity and Peak Resolution in Compound-specific Carbon and Nitrogen Isotope Analysis. [PDF]

Anal Chem
Al-Ghoul H, Elsner M.
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
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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
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Forensic applications of isotope ratio mass spectrometry—A review

Forensic Science International, 2006
The key role of a forensic scientist is to assist in determining whether a crime has been committed, and if so, assist in the identification of the offender. Many people hold the belief that a particular item can be conclusively linked to a specific person, place or object. Unfortunately, this is often not achievable in forensic science.
Sarah, Benson, Chris, Lennard, Philip, Maynard, Claude, Roux   +3 more
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Forensic isotope ratio mass spectrometry of packaging tapes

The Analyst, 2004
Pressure sensitive adhesive tape (brown parcel tape) is employed in a great many criminal activities such as the restraint of individuals during robbery and offences against the person, the enclosure of explosive devices and the packaging and concealment of controlled drugs.
Carter, James F., Grundy, Polly L., Hill, Jenny C., Ronan, Neil C., Titterton, Emma L., Sleeman, Richard   +5 more
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A review on the determination of isotope ratios of boron with mass spectrometry

Mass Spectrometry Reviews, 2016
The present review discusses different mass spectrometric techniques—viz, thermal ionization mass spectrometry (TIMS), inductively coupled plasma mass spectrometry (ICPMS), and secondary ion mass spectrometry (SIMS)—used to determine 11B/10B isotope ratio, and concentration of boron required for various applications in earth sciences, marine ...
Suresh Kumar, Aggarwal, Chen-Feng, You
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The Influence of Diet on Isotope Ratio Mass Spectrometry Values

Clinical Journal of Sport Medicine, 2009
Athletes have increasingly used testosterone (T) and other endogenous anabolic steroids that cannot be detected by conventional gas chromatography-mass spectrometry. This led to gas chromatography-combustion-isotope ratio mass spectrometry(GC/C/IRMS), which measures the relative amount of 13C in urinary steroids.
Gary, Green, Rodrigo, Aguilera, Brian, Ahrens, Boro, Starcevic, Felice, Kurtzman, Jinbo, Su, Don, Catlin   +6 more
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